Lothorewyn, the Corrupted

+1: Put a -1/-1 counter on each of up to two target creatures.
0: Create a 0/1 black Corruption creature token with, "Sacrifice this creature: Put 2 -1/-1 counters on target creature, you gain 2 life."
-7: Destroy each creature with a -1/-1 counter on it. You gain 1 life and draw a card for each creature destroyed this way.