Where the Wonder Women Are: #25 Kitty Pryde
Introduced in 1980, Kitty Pryde’s power is basically the ability to become intangible, which allows her to phase through walls, fall through floors and make sure no one gets a chance to punch her in the face. It’s the kind of power that can be written as passive, in the hands of a writer without much imagination. But another side effect of her powers is that when she phases through anything mechanical, it screws it up royally. Considering that one of the greatest ongoing threats to the X-Men are the giant robotic Sentinels, this is crazy useful.