Sorin, the Ravenous

+2: Discard a card. If you do, Sorin, the Ravenous deals 3 damage to any target and you gain 3 life.
0: Create a 2/2 black Vampire creature token with deathtouch. Then, if an opponent lost life this turn, put a +1/+1 counter on it.
-7: Sorin, the Ravenous deals 10 damage to each opponent and each other planeswaker. You gain life equal to the total life lost this way.