satori01 said:
Logically one could argue Magic Missle is the anti Mirror Image spell, since if you cant target the Images, you would naturally target the real person.
Let's say you're a 1st level wizard. You know that over there, there are three statues of a goblin assassin, and one goblin assassin disguised as a statue of a goblin assassin.
You can't just cast Magic Missile "to hit the real goblin assassin". You have to choose a target. If it's a creature, a missile of magical energy darts forth from your fingertip and strikes its target. If it's not a creature: "If you ever try to cast a spell in conditions where the characteristics of the spell cannot be made to conform, the casting fails and the spell is wasted."
Now let's say you're a 3rd level wizard in the same situation. You have two options - direct both missiles at one target, or direct one missile at each of two targets.
If you direct both missiles at one target, and it happens to be the real goblin assassin,
two missiles of magical energy dart forth from your fingertip and strikes their target. If it's a statue, "If you ever try to cast a spell in conditions where the characteristics of the spell cannot be made to conform, the casting fails and the spell is wasted."
So what if you split the missiles? Let's say you choose one statue, and the real goblin assassin. Strictly, you're casting the spell in conditions If you ever try to cast a spell in conditions where the characteristics of the spell cannot be made to conform - one of the targets you chose is not 'one or more creature'. As written, the casting fails and the spell is wasted.
As a DM, I'd rule instead that one missile darts forth and strikes the real goblin, while the other missile fails and is wasted, but I acknowledge that I'm deviating from the strict wording of the "Spell Failure" section.
Now let's replace the statues with mirror image figments.
-Hyp.