Tannin, the Lich

+1: Put a 2/2 zombie token on the battlefield at your control. You lose 1 life.
0: Tannin, the Lich, becomes a 5/5 undead black creature with deathtouch and hexproof. He still is a planeswalker.
-5: Put four 2/2 black zombie token at the battlefield at your control and transform Tannin, the Lich.