Gathok, God of the Undead

+2: Create a 1/3 skaab creature token. Each player mills a card. For each creature card milled this way, put a +1/+1 counter on target creature.
-X: Create a 2/2 black zombie creature token, then put X +1/+1 counters on target creature.
-10: Exile all cards from your opponents' graveyard. Each opponent loses life equal to cards exiled this way. You gain life equal to the life lost.