辐射避难所(Fallout Shelter)官方中文正式版

Question

This is very similar to Do the Armor of Agathys and Mirror Image spells stack, so that hitting an illusory duplicate still causes you to take cold damage?, but I believe this reasoning no longer applies to the 2024 edition of the rules.

The Mirror Image spell description (2024) states (PHB, p. 299; emphasis mine):

Each time a creature hits you with an attack roll during the spell's duration, roll a d6 for each of your remaining duplicates. If any of the d6s rolls a 3 or higher, one of the duplicates is hit instead of you.

(Note the change from the 2014 version, which starts with "Each time a creature targets you with an attack".)

The Armor of Agathys spell description states (PHB, p. 243; emphasis mine):

If a creature hits you with a melee attack roll before the spell ends, the creature takes 5 Cold damage.

This is very similar to the Abjurer's Arcane Ward feature which is also providing damage redirection and is believed to "stack" with Armor of Agathys:

Whenever you take damage, the ward takes the damage instead

So: is it possible to redirect a melee attack to an illusory duplicate in such a way that caster takes no damage but the attacker is punished with the cold damage?

Answer 1

They don't synergize

Mirror Image states (emphasis mine):

Each time a creature hits you with an attack roll during the spell’s duration, roll a d6 for each of your remaining duplicates. If any of the d6s rolls a 3 or higher, one of the duplicates is hit instead of you, and the duplicate is destroyed. The duplicates otherwise ignore all other damage and effects.

So you roll after an attack hits to determine if a duplicate is hit instead of you. If that happens, you are not hit — the hit is retroactively removed — and Armor of Agathys does not trigger.