Gorthaur, the Cruel

+2: Sacrifice a permanent, then draw a card.
0: Until end of turn, Gorthaur, the Cruel becomes a 5/5 black and green Nightmare Wolf creature with devastator 1 that’s still a planeswalker.
-8: You get an emblem with ``Whenever a player sacrifices a permanent, put that card onto the battlefield under your control.``