On the topic of mirror image and shield combo, lets say a creature successfully attacks the real one and then the defender decides to use shield as a reaction, which comes first and which has priority?

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1 Answer 1


Mirror image is resolved before shield can be cast.

Shield requires that you be hit by an attack, having a casting time of 1 Reaction:

which you take when you are hit by an attack or targeted by the magic missile spell

Mirror image is triggered before you are hit with an attack:

Each time a creature targets you with an attack during the spell's duration, roll a d20 to determine whether the attack instead targets one of your duplicates.

So mirror image is always resolved before the trigger for shield can even happen.

  • 1
    \$\begingroup\$ Might be worth going into further explanation for if the caster is targeted by magic missile instead since the wording for the shield spell differs. \$\endgroup\$
    – Clarus_Nox
    Mar 8, 2021 at 1:37
  • 3
    \$\begingroup\$ @Clarus_Nox OP seems to ask specifically about attacks. But the ruling is that magic missile ignores mirror image entirely. \$\endgroup\$ Mar 8, 2021 at 1:54

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