Power Word Kill is a 9th level spell that "compel[s] a creature to die" as long as it has less than 100 hit points.
If this is cast on a druid in wild-shape form with less than 100 HP, does the druid die or does he only revert to his normal state? Is the "creature" the druid himself? Is wild-shape a creature on top of the druid, or is he always the same creature?
I realize that a druid is only knocked out of wild-shape if he hits 0 hit points or is knocked unconscious, so my personal take is that he would simply just die due to the wording of the spell, but I was curious if I was perhaps missing something.