Prafen, Lich Incarnate

+1: You may sacrifice a creature. If you do, you gain life equal to that creature's toughness.
0: Target creature gets -1/-2. If that creature dies this turn, you may pay 2 life. If you do create a 1/1 black Skeleton creature token with menace
-6: You get an emblem with: "Whenever a creature dies, you may pay 2 life. If you do, draw a card."