Kowreta, Reality Mangler

At the beginning of each upkeep, Invert each creature each opponent controls until end of turn.
Whenever an inverted creature dies, invert each creature you control until your next end step.
Inverted creatures you control get +1/+1 and gain Devoid and wastescaping.
Inverted creatures opponents control loose all creature types, get -5/-X where X is that creature's power, and gain devoid.