Yok-Edici, Death

+2: Create two 1/1 black Rat creature tokens with Deathtouch and "When this creature dies destroy target permanent you don't control"
0: You get an emblem it says "Whenever a permanent you control leaves the battlefield you gain 4 life and shuffle your graveyard into your library"
-20: Destroy all creatures, you deal X damage divided up as you choose, where X is the total converted mana cost