Can a creature tell when it has been affected by a Divination wizard's Portent?Does a creature that is immune to all outcomes (conditions, damage, etc.) of an effect still make a saving throw?Why is the Basilisk’s CR so low?How does nondetection interact with School of Divination's Portent?Can you use Lucky (feat) followed by Portent to replace a roll that's already been made?When can a Wild Magic sorcerer use Bend Luck if he can't see the die?How does a Divination Wizard's Portent work when they are not sure if/what roll the target may be making?Is a shield guardian affected by demonic madness in the Out of the Abyss adventure?How does the Divination wizard's Expert Divination feature work when you upcast a divination spell?

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Can a creature tell when it has been affected by a Divination wizard's Portent?


Does a creature that is immune to all outcomes (conditions, damage, etc.) of an effect still make a saving throw?Why is the Basilisk’s CR so low?How does nondetection interact with School of Divination's Portent?Can you use Lucky (feat) followed by Portent to replace a roll that's already been made?When can a Wild Magic sorcerer use Bend Luck if he can't see the die?How does a Divination Wizard's Portent work when they are not sure if/what roll the target may be making?Is a shield guardian affected by demonic madness in the Out of the Abyss adventure?How does the Divination wizard's Expert Divination feature work when you upcast a divination spell?






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14














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Consider the following situation (from my perspective as the DM):



  • One of my PCs casts a spell on an NPC (or monster etc.) which forces the target to make, say, a Wisdom save, or else be frightened.


  • Before the NPC rolls for his save, the divination wizard PC announces that she will use a low Portent die to give him a very low score on the save.


  • Unknown to either the PCs or the players, this NPC has a magical item that prevents him from being frightened, so regardless of the roll of the die, he will be unaffected by the spell.


  • If I announce that the NPC is not frightened, the players (and PCs) will know that the NPC either has a very high Wisdom modifier, or has some item or ability that prevents him from being frightened.


  • I would rather the players and PCs did not know this. Also, the NPC would rather the PCs did not know this.


Can the NPC tell that he has been "Portented"?



If so, he could choose to pretend that he had failed the save i.e. pretend to be frightened. Depending on the circumstances, this might be preferable for the NPC to giving away the existence of his magical item. It might also be preferable for me as the DM, given that I want to keep this item a secret...










share|improve this question











$endgroup$











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    $begingroup$
    A question apparently prompted by the third bullet point: Does a creature that is immune to a condition still make a saving throw?
    $endgroup$
    – V2Blast
    Apr 28 at 23:06










  • $begingroup$
    @Phil Please see this meta for why your comment was removed. Thanks!
    $endgroup$
    – doppelgreener
    Apr 29 at 14:23










  • $begingroup$
    Does the NPC know that the spell is being cast and that it would have caused them to become Frightened?
    $endgroup$
    – Ifusaso
    Apr 29 at 14:27

















14














$begingroup$


Consider the following situation (from my perspective as the DM):



  • One of my PCs casts a spell on an NPC (or monster etc.) which forces the target to make, say, a Wisdom save, or else be frightened.


  • Before the NPC rolls for his save, the divination wizard PC announces that she will use a low Portent die to give him a very low score on the save.


  • Unknown to either the PCs or the players, this NPC has a magical item that prevents him from being frightened, so regardless of the roll of the die, he will be unaffected by the spell.


  • If I announce that the NPC is not frightened, the players (and PCs) will know that the NPC either has a very high Wisdom modifier, or has some item or ability that prevents him from being frightened.


  • I would rather the players and PCs did not know this. Also, the NPC would rather the PCs did not know this.


Can the NPC tell that he has been "Portented"?



If so, he could choose to pretend that he had failed the save i.e. pretend to be frightened. Depending on the circumstances, this might be preferable for the NPC to giving away the existence of his magical item. It might also be preferable for me as the DM, given that I want to keep this item a secret...










share|improve this question











$endgroup$











  • 1




    $begingroup$
    Welcome to RPG.SE! Take the tour if you haven't already and see the help center if you need more guidance. Good Luck and Happy Gaming!
    $endgroup$
    – Someone_Evil
    Apr 28 at 21:01






  • 1




    $begingroup$
    A question apparently prompted by the third bullet point: Does a creature that is immune to a condition still make a saving throw?
    $endgroup$
    – V2Blast
    Apr 28 at 23:06










  • $begingroup$
    @Phil Please see this meta for why your comment was removed. Thanks!
    $endgroup$
    – doppelgreener
    Apr 29 at 14:23










  • $begingroup$
    Does the NPC know that the spell is being cast and that it would have caused them to become Frightened?
    $endgroup$
    – Ifusaso
    Apr 29 at 14:27













14












14








14


1



$begingroup$


Consider the following situation (from my perspective as the DM):



  • One of my PCs casts a spell on an NPC (or monster etc.) which forces the target to make, say, a Wisdom save, or else be frightened.


  • Before the NPC rolls for his save, the divination wizard PC announces that she will use a low Portent die to give him a very low score on the save.


  • Unknown to either the PCs or the players, this NPC has a magical item that prevents him from being frightened, so regardless of the roll of the die, he will be unaffected by the spell.


  • If I announce that the NPC is not frightened, the players (and PCs) will know that the NPC either has a very high Wisdom modifier, or has some item or ability that prevents him from being frightened.


  • I would rather the players and PCs did not know this. Also, the NPC would rather the PCs did not know this.


Can the NPC tell that he has been "Portented"?



If so, he could choose to pretend that he had failed the save i.e. pretend to be frightened. Depending on the circumstances, this might be preferable for the NPC to giving away the existence of his magical item. It might also be preferable for me as the DM, given that I want to keep this item a secret...










share|improve this question











$endgroup$




Consider the following situation (from my perspective as the DM):



  • One of my PCs casts a spell on an NPC (or monster etc.) which forces the target to make, say, a Wisdom save, or else be frightened.


  • Before the NPC rolls for his save, the divination wizard PC announces that she will use a low Portent die to give him a very low score on the save.


  • Unknown to either the PCs or the players, this NPC has a magical item that prevents him from being frightened, so regardless of the roll of the die, he will be unaffected by the spell.


  • If I announce that the NPC is not frightened, the players (and PCs) will know that the NPC either has a very high Wisdom modifier, or has some item or ability that prevents him from being frightened.


  • I would rather the players and PCs did not know this. Also, the NPC would rather the PCs did not know this.


Can the NPC tell that he has been "Portented"?



If so, he could choose to pretend that he had failed the save i.e. pretend to be frightened. Depending on the circumstances, this might be preferable for the NPC to giving away the existence of his magical item. It might also be preferable for me as the DM, given that I want to keep this item a secret...







dnd-5e class-feature wizard divination






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share|improve this question













share|improve this question




share|improve this question



share|improve this question








edited Apr 28 at 22:09









V2Blast

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asked Apr 28 at 21:00









DM_with_secretsDM_with_secrets

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3634 silver badges9 bronze badges










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    – Someone_Evil
    Apr 28 at 21:01






  • 1




    $begingroup$
    A question apparently prompted by the third bullet point: Does a creature that is immune to a condition still make a saving throw?
    $endgroup$
    – V2Blast
    Apr 28 at 23:06










  • $begingroup$
    @Phil Please see this meta for why your comment was removed. Thanks!
    $endgroup$
    – doppelgreener
    Apr 29 at 14:23










  • $begingroup$
    Does the NPC know that the spell is being cast and that it would have caused them to become Frightened?
    $endgroup$
    – Ifusaso
    Apr 29 at 14:27












  • 1




    $begingroup$
    Welcome to RPG.SE! Take the tour if you haven't already and see the help center if you need more guidance. Good Luck and Happy Gaming!
    $endgroup$
    – Someone_Evil
    Apr 28 at 21:01






  • 1




    $begingroup$
    A question apparently prompted by the third bullet point: Does a creature that is immune to a condition still make a saving throw?
    $endgroup$
    – V2Blast
    Apr 28 at 23:06










  • $begingroup$
    @Phil Please see this meta for why your comment was removed. Thanks!
    $endgroup$
    – doppelgreener
    Apr 29 at 14:23










  • $begingroup$
    Does the NPC know that the spell is being cast and that it would have caused them to become Frightened?
    $endgroup$
    – Ifusaso
    Apr 29 at 14:27







1




1




$begingroup$
Welcome to RPG.SE! Take the tour if you haven't already and see the help center if you need more guidance. Good Luck and Happy Gaming!
$endgroup$
– Someone_Evil
Apr 28 at 21:01




$begingroup$
Welcome to RPG.SE! Take the tour if you haven't already and see the help center if you need more guidance. Good Luck and Happy Gaming!
$endgroup$
– Someone_Evil
Apr 28 at 21:01




1




1




$begingroup$
A question apparently prompted by the third bullet point: Does a creature that is immune to a condition still make a saving throw?
$endgroup$
– V2Blast
Apr 28 at 23:06




$begingroup$
A question apparently prompted by the third bullet point: Does a creature that is immune to a condition still make a saving throw?
$endgroup$
– V2Blast
Apr 28 at 23:06












$begingroup$
@Phil Please see this meta for why your comment was removed. Thanks!
$endgroup$
– doppelgreener
Apr 29 at 14:23




$begingroup$
@Phil Please see this meta for why your comment was removed. Thanks!
$endgroup$
– doppelgreener
Apr 29 at 14:23












$begingroup$
Does the NPC know that the spell is being cast and that it would have caused them to become Frightened?
$endgroup$
– Ifusaso
Apr 29 at 14:27




$begingroup$
Does the NPC know that the spell is being cast and that it would have caused them to become Frightened?
$endgroup$
– Ifusaso
Apr 29 at 14:27










4 Answers
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No, there is no way to know that Portent was "used"



Portent is an unusual feature in that it leverages the distinction between the player and their character. Obviously, it is the player's choice when to replace a roll with a foretelling roll, but within the fiction, this does not correspond to any action or even any thought or intent on the character's part. All the character does is witness the fact that the glimpse of the future they received earlier that day has indeed come to pass.



To put it another way, when a foretelling roll is used, nothing changes in the present. Instead, the player retroactively decides what vision of the future their character has already received in the past. Hence, there is no detectable effect to be noticed in the present to determine that the feature was used.



This interpretation is supported by the first sentence of the feature, which is the only part that describes how it works rather than the mechanics of using it:




Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness.




Also note that no action or reaction of any kind is required to use the feature. If Portent represented an active manipulation of probability or fate by the diviner, it would make more sense for it to require a reaction to do so. Contrast this with the Wild Magic sorceror's Bend Luck ability, which explicitly does actively manipulate fate, and requires the sorceror's reaction to do so (emphasis added):




Starting at 6th level, you have the ability to twist fate using your wild magic. When another creature you can see makes an attack roll, an ability check, or a saving throw, you can use your reaction and spend 2 sorcery points to roll 1d4 and apply the number rolled as a bonus or penalty (your choice) to the creature’s roll. [...]




In the case of the Bend Luck ability, the sorceror is using their force of will to change something rather than passively witnessing something they had seen in a vision. In this case, it might not be unreasonable for the DM to rule that the victim sensed some kind of probabilistic funny business going on, e.g. "I'm sure that rock I tripped over wasn't there a second ago!"



Immunity to frightening (or another condition) is not a dead giveaway for your secret magic item



To address your specific problem, immunity to fear is not a terribly rare effect, so that alone isn't necessarily going to tip off your players that a special magic item is in play. Furthermore, if your players do infer that a magic item is protecting NPC from fear, they will most likely assume that the item does that and nothing more. From your question, it seems like the item in question probably does a good deal more than simply protect from fear. But if you're really worried about your players figuring it out, I think the best advice is to make sure you can still tell an interesting story if they do so, even if it's different from the story you had planned.



It seems that the fear effect was just an example, but the same can be said of most other condition immunities. At worst, your players will probably suspect a magic item or spell that specifically protects from that one condition.






share|improve this answer












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    11
















    $begingroup$

    No character in the game knows that a portent was used.



    The Portent feature doesn't have any visible or otherwise detectable in-world component. As written, not even the Diviner knows about the Portent in any way other than that the events are unfolding the same way they saw in a "glimpse of the future". The characters don't know whether their fate is being decided by dice, the DM, or by the players.



    However, your NPC might be able to tell which spell is being cast.



    An optional rule in Xanathar's Guide to Everything allows a creature to use a reaction to make an Arcana check to know which spell another creature is casting (DC is equal to 15 plus the spell's level). You could make this roll behind the screen to allow the NPC to know that the PC's spell would normally cause fear, an effect they're immune to, and then act as if they're frightened.



    Your players will not necessarily assume the NPC is immune to fear.



    Lots of creatures have legendary resistances, allowing them to choose to succeed on a saving throw when the dice (or portent) say they fail. If your NPC shows no signs of being frightened even after being portented to fail, the players might just assume the NPC used a legendary resistance.






    share|improve this answer












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      5
















      $begingroup$

      Probably not.



      To understand the workings of the feature, here is the description of the Divination wizard's Portent feature from p. 116 of the Player's Handbook:




      Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness. When you finish a long rest, roll two d20s and record the numbers rolled. You can replace any attack roll, saving throw, or ability check made by you or a creature that you can see with one of these foretelling rolls. You must choose to do so before the roll, and you can replace a roll in this way only once per turn.



      Each foretelling roll can be used only once. When you finish a long rest, you lose any unused foretelling rolls.




      As seen from here, the Divination Wizard doesn't actually alter the future but instead sees glimpses of it. Since all rolls of a die are independent of each other and equally likely to land on any of the numbers 1 through 20, the act of you replacing a creature's roll with a Portent die isn't equivalent to, say, imposing disadvantage on a roll, since what has essentially happened is that the die roll for that particular moment was already rolled when the Divination Wizard took a long rest.



      It's ultimately up to how you roleplay it as to how powerful this can become, however. An intelligent creature, like a goblin, might notice that a certain wizard is of the divination school by the nature of their spells, and would realise that diviners can see glimpses into the future. As a result, it may logically pretend to fail saving throws against conditions despite immunity to them to throw off the players.






      share|improve this answer












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        0
















        $begingroup$

        No



        In general, things in D&D that are "magical" have no noticable effect unless the rules text says they do. For example, spells are not noticed unless they have a visible effect:




        Unless a spell has a perceptible effect, a creature might not know it was targeted by a spell at all. An effect like crackling lightning is obvious, but a more subtle effect, such as an attempt to read a creature’s thoughts, typically goes unnoticed, unless a spell says otherwise.




        Things aren't noticable unless the game says they are in 5e.



        Portent doesn't have any noticable action tied to it.



        In fact, the NPC may not be aware that it had a spell cast on it at all. Many spells have visible effects, and with Arcana you can deduce what the spell is, especially after it is cast (a yellow cone is far easier to recognize than specific hand gestures).



        Some Frightened spells, like Antipathy, have no visible effect. The NPC would just feel an urge to leave the area. They would be unaware they where at risk of being Fightened, or that they had a saving throw or not.






        share|improve this answer












        $endgroup$














        • $begingroup$
          Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
          $endgroup$
          – NautArch
          Apr 29 at 15:38










        • $begingroup$
          @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
          $endgroup$
          – Yakk
          Apr 29 at 17:07











        • $begingroup$
          Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
          $endgroup$
          – NautArch
          Apr 29 at 17:12












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        4 Answers
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        4 Answers
        4






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        active

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        27
















        $begingroup$

        No, there is no way to know that Portent was "used"



        Portent is an unusual feature in that it leverages the distinction between the player and their character. Obviously, it is the player's choice when to replace a roll with a foretelling roll, but within the fiction, this does not correspond to any action or even any thought or intent on the character's part. All the character does is witness the fact that the glimpse of the future they received earlier that day has indeed come to pass.



        To put it another way, when a foretelling roll is used, nothing changes in the present. Instead, the player retroactively decides what vision of the future their character has already received in the past. Hence, there is no detectable effect to be noticed in the present to determine that the feature was used.



        This interpretation is supported by the first sentence of the feature, which is the only part that describes how it works rather than the mechanics of using it:




        Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness.




        Also note that no action or reaction of any kind is required to use the feature. If Portent represented an active manipulation of probability or fate by the diviner, it would make more sense for it to require a reaction to do so. Contrast this with the Wild Magic sorceror's Bend Luck ability, which explicitly does actively manipulate fate, and requires the sorceror's reaction to do so (emphasis added):




        Starting at 6th level, you have the ability to twist fate using your wild magic. When another creature you can see makes an attack roll, an ability check, or a saving throw, you can use your reaction and spend 2 sorcery points to roll 1d4 and apply the number rolled as a bonus or penalty (your choice) to the creature’s roll. [...]




        In the case of the Bend Luck ability, the sorceror is using their force of will to change something rather than passively witnessing something they had seen in a vision. In this case, it might not be unreasonable for the DM to rule that the victim sensed some kind of probabilistic funny business going on, e.g. "I'm sure that rock I tripped over wasn't there a second ago!"



        Immunity to frightening (or another condition) is not a dead giveaway for your secret magic item



        To address your specific problem, immunity to fear is not a terribly rare effect, so that alone isn't necessarily going to tip off your players that a special magic item is in play. Furthermore, if your players do infer that a magic item is protecting NPC from fear, they will most likely assume that the item does that and nothing more. From your question, it seems like the item in question probably does a good deal more than simply protect from fear. But if you're really worried about your players figuring it out, I think the best advice is to make sure you can still tell an interesting story if they do so, even if it's different from the story you had planned.



        It seems that the fear effect was just an example, but the same can be said of most other condition immunities. At worst, your players will probably suspect a magic item or spell that specifically protects from that one condition.






        share|improve this answer












        $endgroup$



















          27
















          $begingroup$

          No, there is no way to know that Portent was "used"



          Portent is an unusual feature in that it leverages the distinction between the player and their character. Obviously, it is the player's choice when to replace a roll with a foretelling roll, but within the fiction, this does not correspond to any action or even any thought or intent on the character's part. All the character does is witness the fact that the glimpse of the future they received earlier that day has indeed come to pass.



          To put it another way, when a foretelling roll is used, nothing changes in the present. Instead, the player retroactively decides what vision of the future their character has already received in the past. Hence, there is no detectable effect to be noticed in the present to determine that the feature was used.



          This interpretation is supported by the first sentence of the feature, which is the only part that describes how it works rather than the mechanics of using it:




          Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness.




          Also note that no action or reaction of any kind is required to use the feature. If Portent represented an active manipulation of probability or fate by the diviner, it would make more sense for it to require a reaction to do so. Contrast this with the Wild Magic sorceror's Bend Luck ability, which explicitly does actively manipulate fate, and requires the sorceror's reaction to do so (emphasis added):




          Starting at 6th level, you have the ability to twist fate using your wild magic. When another creature you can see makes an attack roll, an ability check, or a saving throw, you can use your reaction and spend 2 sorcery points to roll 1d4 and apply the number rolled as a bonus or penalty (your choice) to the creature’s roll. [...]




          In the case of the Bend Luck ability, the sorceror is using their force of will to change something rather than passively witnessing something they had seen in a vision. In this case, it might not be unreasonable for the DM to rule that the victim sensed some kind of probabilistic funny business going on, e.g. "I'm sure that rock I tripped over wasn't there a second ago!"



          Immunity to frightening (or another condition) is not a dead giveaway for your secret magic item



          To address your specific problem, immunity to fear is not a terribly rare effect, so that alone isn't necessarily going to tip off your players that a special magic item is in play. Furthermore, if your players do infer that a magic item is protecting NPC from fear, they will most likely assume that the item does that and nothing more. From your question, it seems like the item in question probably does a good deal more than simply protect from fear. But if you're really worried about your players figuring it out, I think the best advice is to make sure you can still tell an interesting story if they do so, even if it's different from the story you had planned.



          It seems that the fear effect was just an example, but the same can be said of most other condition immunities. At worst, your players will probably suspect a magic item or spell that specifically protects from that one condition.






          share|improve this answer












          $endgroup$

















            27














            27










            27







            $begingroup$

            No, there is no way to know that Portent was "used"



            Portent is an unusual feature in that it leverages the distinction between the player and their character. Obviously, it is the player's choice when to replace a roll with a foretelling roll, but within the fiction, this does not correspond to any action or even any thought or intent on the character's part. All the character does is witness the fact that the glimpse of the future they received earlier that day has indeed come to pass.



            To put it another way, when a foretelling roll is used, nothing changes in the present. Instead, the player retroactively decides what vision of the future their character has already received in the past. Hence, there is no detectable effect to be noticed in the present to determine that the feature was used.



            This interpretation is supported by the first sentence of the feature, which is the only part that describes how it works rather than the mechanics of using it:




            Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness.




            Also note that no action or reaction of any kind is required to use the feature. If Portent represented an active manipulation of probability or fate by the diviner, it would make more sense for it to require a reaction to do so. Contrast this with the Wild Magic sorceror's Bend Luck ability, which explicitly does actively manipulate fate, and requires the sorceror's reaction to do so (emphasis added):




            Starting at 6th level, you have the ability to twist fate using your wild magic. When another creature you can see makes an attack roll, an ability check, or a saving throw, you can use your reaction and spend 2 sorcery points to roll 1d4 and apply the number rolled as a bonus or penalty (your choice) to the creature’s roll. [...]




            In the case of the Bend Luck ability, the sorceror is using their force of will to change something rather than passively witnessing something they had seen in a vision. In this case, it might not be unreasonable for the DM to rule that the victim sensed some kind of probabilistic funny business going on, e.g. "I'm sure that rock I tripped over wasn't there a second ago!"



            Immunity to frightening (or another condition) is not a dead giveaway for your secret magic item



            To address your specific problem, immunity to fear is not a terribly rare effect, so that alone isn't necessarily going to tip off your players that a special magic item is in play. Furthermore, if your players do infer that a magic item is protecting NPC from fear, they will most likely assume that the item does that and nothing more. From your question, it seems like the item in question probably does a good deal more than simply protect from fear. But if you're really worried about your players figuring it out, I think the best advice is to make sure you can still tell an interesting story if they do so, even if it's different from the story you had planned.



            It seems that the fear effect was just an example, but the same can be said of most other condition immunities. At worst, your players will probably suspect a magic item or spell that specifically protects from that one condition.






            share|improve this answer












            $endgroup$



            No, there is no way to know that Portent was "used"



            Portent is an unusual feature in that it leverages the distinction between the player and their character. Obviously, it is the player's choice when to replace a roll with a foretelling roll, but within the fiction, this does not correspond to any action or even any thought or intent on the character's part. All the character does is witness the fact that the glimpse of the future they received earlier that day has indeed come to pass.



            To put it another way, when a foretelling roll is used, nothing changes in the present. Instead, the player retroactively decides what vision of the future their character has already received in the past. Hence, there is no detectable effect to be noticed in the present to determine that the feature was used.



            This interpretation is supported by the first sentence of the feature, which is the only part that describes how it works rather than the mechanics of using it:




            Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness.




            Also note that no action or reaction of any kind is required to use the feature. If Portent represented an active manipulation of probability or fate by the diviner, it would make more sense for it to require a reaction to do so. Contrast this with the Wild Magic sorceror's Bend Luck ability, which explicitly does actively manipulate fate, and requires the sorceror's reaction to do so (emphasis added):




            Starting at 6th level, you have the ability to twist fate using your wild magic. When another creature you can see makes an attack roll, an ability check, or a saving throw, you can use your reaction and spend 2 sorcery points to roll 1d4 and apply the number rolled as a bonus or penalty (your choice) to the creature’s roll. [...]




            In the case of the Bend Luck ability, the sorceror is using their force of will to change something rather than passively witnessing something they had seen in a vision. In this case, it might not be unreasonable for the DM to rule that the victim sensed some kind of probabilistic funny business going on, e.g. "I'm sure that rock I tripped over wasn't there a second ago!"



            Immunity to frightening (or another condition) is not a dead giveaway for your secret magic item



            To address your specific problem, immunity to fear is not a terribly rare effect, so that alone isn't necessarily going to tip off your players that a special magic item is in play. Furthermore, if your players do infer that a magic item is protecting NPC from fear, they will most likely assume that the item does that and nothing more. From your question, it seems like the item in question probably does a good deal more than simply protect from fear. But if you're really worried about your players figuring it out, I think the best advice is to make sure you can still tell an interesting story if they do so, even if it's different from the story you had planned.



            It seems that the fear effect was just an example, but the same can be said of most other condition immunities. At worst, your players will probably suspect a magic item or spell that specifically protects from that one condition.







            share|improve this answer















            share|improve this answer




            share|improve this answer



            share|improve this answer








            edited Apr 29 at 6:00

























            answered Apr 28 at 21:16









            Ryan ThompsonRyan Thompson

            21.2k2 gold badges72 silver badges142 bronze badges




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                11
















                $begingroup$

                No character in the game knows that a portent was used.



                The Portent feature doesn't have any visible or otherwise detectable in-world component. As written, not even the Diviner knows about the Portent in any way other than that the events are unfolding the same way they saw in a "glimpse of the future". The characters don't know whether their fate is being decided by dice, the DM, or by the players.



                However, your NPC might be able to tell which spell is being cast.



                An optional rule in Xanathar's Guide to Everything allows a creature to use a reaction to make an Arcana check to know which spell another creature is casting (DC is equal to 15 plus the spell's level). You could make this roll behind the screen to allow the NPC to know that the PC's spell would normally cause fear, an effect they're immune to, and then act as if they're frightened.



                Your players will not necessarily assume the NPC is immune to fear.



                Lots of creatures have legendary resistances, allowing them to choose to succeed on a saving throw when the dice (or portent) say they fail. If your NPC shows no signs of being frightened even after being portented to fail, the players might just assume the NPC used a legendary resistance.






                share|improve this answer












                $endgroup$



















                  11
















                  $begingroup$

                  No character in the game knows that a portent was used.



                  The Portent feature doesn't have any visible or otherwise detectable in-world component. As written, not even the Diviner knows about the Portent in any way other than that the events are unfolding the same way they saw in a "glimpse of the future". The characters don't know whether their fate is being decided by dice, the DM, or by the players.



                  However, your NPC might be able to tell which spell is being cast.



                  An optional rule in Xanathar's Guide to Everything allows a creature to use a reaction to make an Arcana check to know which spell another creature is casting (DC is equal to 15 plus the spell's level). You could make this roll behind the screen to allow the NPC to know that the PC's spell would normally cause fear, an effect they're immune to, and then act as if they're frightened.



                  Your players will not necessarily assume the NPC is immune to fear.



                  Lots of creatures have legendary resistances, allowing them to choose to succeed on a saving throw when the dice (or portent) say they fail. If your NPC shows no signs of being frightened even after being portented to fail, the players might just assume the NPC used a legendary resistance.






                  share|improve this answer












                  $endgroup$

















                    11














                    11










                    11







                    $begingroup$

                    No character in the game knows that a portent was used.



                    The Portent feature doesn't have any visible or otherwise detectable in-world component. As written, not even the Diviner knows about the Portent in any way other than that the events are unfolding the same way they saw in a "glimpse of the future". The characters don't know whether their fate is being decided by dice, the DM, or by the players.



                    However, your NPC might be able to tell which spell is being cast.



                    An optional rule in Xanathar's Guide to Everything allows a creature to use a reaction to make an Arcana check to know which spell another creature is casting (DC is equal to 15 plus the spell's level). You could make this roll behind the screen to allow the NPC to know that the PC's spell would normally cause fear, an effect they're immune to, and then act as if they're frightened.



                    Your players will not necessarily assume the NPC is immune to fear.



                    Lots of creatures have legendary resistances, allowing them to choose to succeed on a saving throw when the dice (or portent) say they fail. If your NPC shows no signs of being frightened even after being portented to fail, the players might just assume the NPC used a legendary resistance.






                    share|improve this answer












                    $endgroup$



                    No character in the game knows that a portent was used.



                    The Portent feature doesn't have any visible or otherwise detectable in-world component. As written, not even the Diviner knows about the Portent in any way other than that the events are unfolding the same way they saw in a "glimpse of the future". The characters don't know whether their fate is being decided by dice, the DM, or by the players.



                    However, your NPC might be able to tell which spell is being cast.



                    An optional rule in Xanathar's Guide to Everything allows a creature to use a reaction to make an Arcana check to know which spell another creature is casting (DC is equal to 15 plus the spell's level). You could make this roll behind the screen to allow the NPC to know that the PC's spell would normally cause fear, an effect they're immune to, and then act as if they're frightened.



                    Your players will not necessarily assume the NPC is immune to fear.



                    Lots of creatures have legendary resistances, allowing them to choose to succeed on a saving throw when the dice (or portent) say they fail. If your NPC shows no signs of being frightened even after being portented to fail, the players might just assume the NPC used a legendary resistance.







                    share|improve this answer















                    share|improve this answer




                    share|improve this answer



                    share|improve this answer








                    edited Apr 29 at 13:27

























                    answered Apr 28 at 21:10









                    ApocalispApocalisp

                    4,04418 silver badges46 bronze badges




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                        5
















                        $begingroup$

                        Probably not.



                        To understand the workings of the feature, here is the description of the Divination wizard's Portent feature from p. 116 of the Player's Handbook:




                        Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness. When you finish a long rest, roll two d20s and record the numbers rolled. You can replace any attack roll, saving throw, or ability check made by you or a creature that you can see with one of these foretelling rolls. You must choose to do so before the roll, and you can replace a roll in this way only once per turn.



                        Each foretelling roll can be used only once. When you finish a long rest, you lose any unused foretelling rolls.




                        As seen from here, the Divination Wizard doesn't actually alter the future but instead sees glimpses of it. Since all rolls of a die are independent of each other and equally likely to land on any of the numbers 1 through 20, the act of you replacing a creature's roll with a Portent die isn't equivalent to, say, imposing disadvantage on a roll, since what has essentially happened is that the die roll for that particular moment was already rolled when the Divination Wizard took a long rest.



                        It's ultimately up to how you roleplay it as to how powerful this can become, however. An intelligent creature, like a goblin, might notice that a certain wizard is of the divination school by the nature of their spells, and would realise that diviners can see glimpses into the future. As a result, it may logically pretend to fail saving throws against conditions despite immunity to them to throw off the players.






                        share|improve this answer












                        $endgroup$



















                          5
















                          $begingroup$

                          Probably not.



                          To understand the workings of the feature, here is the description of the Divination wizard's Portent feature from p. 116 of the Player's Handbook:




                          Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness. When you finish a long rest, roll two d20s and record the numbers rolled. You can replace any attack roll, saving throw, or ability check made by you or a creature that you can see with one of these foretelling rolls. You must choose to do so before the roll, and you can replace a roll in this way only once per turn.



                          Each foretelling roll can be used only once. When you finish a long rest, you lose any unused foretelling rolls.




                          As seen from here, the Divination Wizard doesn't actually alter the future but instead sees glimpses of it. Since all rolls of a die are independent of each other and equally likely to land on any of the numbers 1 through 20, the act of you replacing a creature's roll with a Portent die isn't equivalent to, say, imposing disadvantage on a roll, since what has essentially happened is that the die roll for that particular moment was already rolled when the Divination Wizard took a long rest.



                          It's ultimately up to how you roleplay it as to how powerful this can become, however. An intelligent creature, like a goblin, might notice that a certain wizard is of the divination school by the nature of their spells, and would realise that diviners can see glimpses into the future. As a result, it may logically pretend to fail saving throws against conditions despite immunity to them to throw off the players.






                          share|improve this answer












                          $endgroup$

















                            5














                            5










                            5







                            $begingroup$

                            Probably not.



                            To understand the workings of the feature, here is the description of the Divination wizard's Portent feature from p. 116 of the Player's Handbook:




                            Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness. When you finish a long rest, roll two d20s and record the numbers rolled. You can replace any attack roll, saving throw, or ability check made by you or a creature that you can see with one of these foretelling rolls. You must choose to do so before the roll, and you can replace a roll in this way only once per turn.



                            Each foretelling roll can be used only once. When you finish a long rest, you lose any unused foretelling rolls.




                            As seen from here, the Divination Wizard doesn't actually alter the future but instead sees glimpses of it. Since all rolls of a die are independent of each other and equally likely to land on any of the numbers 1 through 20, the act of you replacing a creature's roll with a Portent die isn't equivalent to, say, imposing disadvantage on a roll, since what has essentially happened is that the die roll for that particular moment was already rolled when the Divination Wizard took a long rest.



                            It's ultimately up to how you roleplay it as to how powerful this can become, however. An intelligent creature, like a goblin, might notice that a certain wizard is of the divination school by the nature of their spells, and would realise that diviners can see glimpses into the future. As a result, it may logically pretend to fail saving throws against conditions despite immunity to them to throw off the players.






                            share|improve this answer












                            $endgroup$



                            Probably not.



                            To understand the workings of the feature, here is the description of the Divination wizard's Portent feature from p. 116 of the Player's Handbook:




                            Starting at 2nd level when you choose this school, glimpses of the future begin to press in on your awareness. When you finish a long rest, roll two d20s and record the numbers rolled. You can replace any attack roll, saving throw, or ability check made by you or a creature that you can see with one of these foretelling rolls. You must choose to do so before the roll, and you can replace a roll in this way only once per turn.



                            Each foretelling roll can be used only once. When you finish a long rest, you lose any unused foretelling rolls.




                            As seen from here, the Divination Wizard doesn't actually alter the future but instead sees glimpses of it. Since all rolls of a die are independent of each other and equally likely to land on any of the numbers 1 through 20, the act of you replacing a creature's roll with a Portent die isn't equivalent to, say, imposing disadvantage on a roll, since what has essentially happened is that the die roll for that particular moment was already rolled when the Divination Wizard took a long rest.



                            It's ultimately up to how you roleplay it as to how powerful this can become, however. An intelligent creature, like a goblin, might notice that a certain wizard is of the divination school by the nature of their spells, and would realise that diviners can see glimpses into the future. As a result, it may logically pretend to fail saving throws against conditions despite immunity to them to throw off the players.







                            share|improve this answer















                            share|improve this answer




                            share|improve this answer



                            share|improve this answer








                            edited Apr 28 at 22:10









                            V2Blast

                            34.3k5 gold badges123 silver badges216 bronze badges




                            34.3k5 gold badges123 silver badges216 bronze badges










                            answered Apr 28 at 21:27









                            KycetiKyceti

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                            2312 silver badges5 bronze badges
























                                0
















                                $begingroup$

                                No



                                In general, things in D&D that are "magical" have no noticable effect unless the rules text says they do. For example, spells are not noticed unless they have a visible effect:




                                Unless a spell has a perceptible effect, a creature might not know it was targeted by a spell at all. An effect like crackling lightning is obvious, but a more subtle effect, such as an attempt to read a creature’s thoughts, typically goes unnoticed, unless a spell says otherwise.




                                Things aren't noticable unless the game says they are in 5e.



                                Portent doesn't have any noticable action tied to it.



                                In fact, the NPC may not be aware that it had a spell cast on it at all. Many spells have visible effects, and with Arcana you can deduce what the spell is, especially after it is cast (a yellow cone is far easier to recognize than specific hand gestures).



                                Some Frightened spells, like Antipathy, have no visible effect. The NPC would just feel an urge to leave the area. They would be unaware they where at risk of being Fightened, or that they had a saving throw or not.






                                share|improve this answer












                                $endgroup$














                                • $begingroup$
                                  Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 15:38










                                • $begingroup$
                                  @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
                                  $endgroup$
                                  – Yakk
                                  Apr 29 at 17:07











                                • $begingroup$
                                  Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 17:12















                                0
















                                $begingroup$

                                No



                                In general, things in D&D that are "magical" have no noticable effect unless the rules text says they do. For example, spells are not noticed unless they have a visible effect:




                                Unless a spell has a perceptible effect, a creature might not know it was targeted by a spell at all. An effect like crackling lightning is obvious, but a more subtle effect, such as an attempt to read a creature’s thoughts, typically goes unnoticed, unless a spell says otherwise.




                                Things aren't noticable unless the game says they are in 5e.



                                Portent doesn't have any noticable action tied to it.



                                In fact, the NPC may not be aware that it had a spell cast on it at all. Many spells have visible effects, and with Arcana you can deduce what the spell is, especially after it is cast (a yellow cone is far easier to recognize than specific hand gestures).



                                Some Frightened spells, like Antipathy, have no visible effect. The NPC would just feel an urge to leave the area. They would be unaware they where at risk of being Fightened, or that they had a saving throw or not.






                                share|improve this answer












                                $endgroup$














                                • $begingroup$
                                  Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 15:38










                                • $begingroup$
                                  @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
                                  $endgroup$
                                  – Yakk
                                  Apr 29 at 17:07











                                • $begingroup$
                                  Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 17:12













                                0














                                0










                                0







                                $begingroup$

                                No



                                In general, things in D&D that are "magical" have no noticable effect unless the rules text says they do. For example, spells are not noticed unless they have a visible effect:




                                Unless a spell has a perceptible effect, a creature might not know it was targeted by a spell at all. An effect like crackling lightning is obvious, but a more subtle effect, such as an attempt to read a creature’s thoughts, typically goes unnoticed, unless a spell says otherwise.




                                Things aren't noticable unless the game says they are in 5e.



                                Portent doesn't have any noticable action tied to it.



                                In fact, the NPC may not be aware that it had a spell cast on it at all. Many spells have visible effects, and with Arcana you can deduce what the spell is, especially after it is cast (a yellow cone is far easier to recognize than specific hand gestures).



                                Some Frightened spells, like Antipathy, have no visible effect. The NPC would just feel an urge to leave the area. They would be unaware they where at risk of being Fightened, or that they had a saving throw or not.






                                share|improve this answer












                                $endgroup$



                                No



                                In general, things in D&D that are "magical" have no noticable effect unless the rules text says they do. For example, spells are not noticed unless they have a visible effect:




                                Unless a spell has a perceptible effect, a creature might not know it was targeted by a spell at all. An effect like crackling lightning is obvious, but a more subtle effect, such as an attempt to read a creature’s thoughts, typically goes unnoticed, unless a spell says otherwise.




                                Things aren't noticable unless the game says they are in 5e.



                                Portent doesn't have any noticable action tied to it.



                                In fact, the NPC may not be aware that it had a spell cast on it at all. Many spells have visible effects, and with Arcana you can deduce what the spell is, especially after it is cast (a yellow cone is far easier to recognize than specific hand gestures).



                                Some Frightened spells, like Antipathy, have no visible effect. The NPC would just feel an urge to leave the area. They would be unaware they where at risk of being Fightened, or that they had a saving throw or not.







                                share|improve this answer















                                share|improve this answer




                                share|improve this answer



                                share|improve this answer








                                edited Apr 29 at 21:57









                                V2Blast

                                34.3k5 gold badges123 silver badges216 bronze badges




                                34.3k5 gold badges123 silver badges216 bronze badges










                                answered Apr 29 at 15:35









                                YakkYakk

                                9,12616 silver badges47 bronze badges




                                9,12616 silver badges47 bronze badges














                                • $begingroup$
                                  Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 15:38










                                • $begingroup$
                                  @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
                                  $endgroup$
                                  – Yakk
                                  Apr 29 at 17:07











                                • $begingroup$
                                  Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 17:12
















                                • $begingroup$
                                  Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 15:38










                                • $begingroup$
                                  @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
                                  $endgroup$
                                  – Yakk
                                  Apr 29 at 17:07











                                • $begingroup$
                                  Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
                                  $endgroup$
                                  – NautArch
                                  Apr 29 at 17:12















                                $begingroup$
                                Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
                                $endgroup$
                                – NautArch
                                Apr 29 at 15:38




                                $begingroup$
                                Portent is not a spell, though. Why do you think the spell rules apply to a class feature?
                                $endgroup$
                                – NautArch
                                Apr 29 at 15:38












                                $begingroup$
                                @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
                                $endgroup$
                                – Yakk
                                Apr 29 at 17:07





                                $begingroup$
                                @NautArch Spells are not noticed because no rule says they are noticed. There is no rule that Portent is noticed. Spells are just an example; even if the target rolls a saving throw, unless the spell has something the target can notice, the saving throw isn't noticed by the target; having dice substituted seems even less vulgar. I clarified.
                                $endgroup$
                                – Yakk
                                Apr 29 at 17:07













                                $begingroup$
                                Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
                                $endgroup$
                                – NautArch
                                Apr 29 at 17:12




                                $begingroup$
                                Casting spells is noticeable, though (that's what the components are doing and why Subtle spell is a thing.) I'm not totally disagreeing, but you're shifting your answer into something the others have already covered now.
                                $endgroup$
                                – NautArch
                                Apr 29 at 17:12


















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