Magician of Black Chaos

0: Until end of turn, Magician of Black Chaos becomes a 5/5 Spellcaster creature with Indestructible, that is still a planeswalker.
+1: Tap target creature and place a -1/-1 counter on it.
-10: All creatures you control gain 3 +1/+1 counters, and all creatures target opponent controls gain 3 -1/-1 counters.