Famine

+1: Summon a 1/1 black Thief creature token with {t}: Target creature your opponent controls get +0/-1
0: Famine becomes a green 5/5 Horseman creature with trample and indestructible until end of turn. Famine is still a planeswalker.
-8: All creatures your opponent controls get -2/-3. All creatures you control get +2/+3.