Narzul, Corruptor of Life

+1: You may sacrifice a nontoken creature. If you do, gain life equal to it's toughness. If you don't, you may populate or surveil 3.
-2: Exile any number of creature cards in your graveyard. Create a X/X zombie creature token, where X is the number of creatures exiled this way.
-8: Exile all creature cards from all graveyards. Create a zombie token that's a copy of each creature exiled this way.