Nahiri, Scourge of Worlds

0: Nahiri, Scourge of Worlds cannot go above 9 loyalty counters. You must use this ability.
+4: Destroy up to 5 target creatures opponents control. Create a copy of target creature you control.
-9: Destroy all opponents' creatures. Create a copy of each creature you control. Those copies gain haste. Exile Nahiri, Scourge of Worlds.