Liberator, Urza's Battlethopter [SLD - 2286]

Rarity: R #: 2286 Creature Type or Sub Type: Legendary Artifact Creature — Thopter P: 1 T: 2 Rules Text Contains: Trick or Treat Flash Flying You may cast colorless spells and artifact spells as though they had flash. Whenever you cast a spell, if the amount of mana spent to cast that spell is greater than Liberator's power, put a +1/+1 counter on Liberator.