[@Retired] I would think that a character like a MtG planeswalker would fit in well enough; it's a pretty comic-esque atmosphere, that or I was going to pull a character from a weird fantasy webcomic that I'm fond of.

In both cases there are canonical instances of some force/individual interfering with the ability to planeswalk/open magus gates so I would only consider it a nerf insofar as other characters being stripped of their equipment as you mentioned.

EDIT: None of this being a deal-breaker per say. I have an idea for a Kid Apocalypse variant waiting in the wings.