W. D. Gaster

+1: Create 2 1/1 black Hand creature tokens with haste. Sacrifice half the tokens with the name Hand at the end of turn.
-3: Exile target permanent, then exchange control of all permanents in exile. You gain 1 life for each permanent in your previous exile.
-6: Target player exiles 6 permanents, mills 6 cards, and sacrifices 6 permanents.