Stolas, Enraged Seducer

+2: Gain control of target creature with converted mana cost 4 or less until end of turn. Untap it and give it haste and menace until end of turn.
0: Turn into a 5/5 demon bird with flying, intimidate, menace, and indestructible until end of turn. It's still a Planeswalker.
-8: Return all non-black creatures to their owners hands. If a player's hand exceeds 10 after this, that discards their hand and draws 3 cards.