Potia, Killer of the Dead

: Whenever a creature has a -1/-1 counter put on it, you may create a 1/1 green and black snake enchantment creature token with deathtouch
+1: You may distribute two +1/+1 or -1/-1 counters among creatures you or an opponent controls
-3: Exile target creature with 1 or more -1/-1 counters on it.