Dimentio, Heart of Chaos

: Whenever a creature you control attacks, if you don't own it, create an artifact token with indestructible called Pure Heart.
-2: Gain control of target nonland permanent, then put a loyalty counter on Dimentio for each permanent you control, but don't own.
-13: Destroy all creatures and lands you don't control. You may sacrifice eight Pure Hearts. If you do, gain control of those permanents instead.