[url=http://powerlisting.wikia.com/wiki/Nonexistence]Nonexistence[/url], which is perhaps one of the most OP powers ever after reading up on what it implies. You could erase even omnipotent beings with such a thing. But honestly, it seems to be one of the worst powers you could get. One screw up and you could even erase yourself (as I'm implying the wielder is also affect by their power).