Veya, Lantern Bearer

+1: Target player puts the top three cards of their library into their graveyard. You may have that player gain 3 life.
+1: If three or more creature cards were put into target graveyard since your last turn, create a 2/2 black Zombie creature token.
-2: Target opponent loses 1 life. Creatures that player controls get -1/-1 until end of turn and can't block black creatures this turn.