Liberator, Urza's Battlethopter [The Brothers' War] H30 When you find enough clues

When you find enough clues to learn what's really going on

that creature's controller mills two cards

and certainly not in any of the sliver labs

Carnifex Demon enters the battlefield with two -1/-1 counters on it

Set: Magic 2012 Type: Artifact Rarity: Rare Cost: {2} {1}

Liberator, Urza's Battlethopter [The Brothers' War] H30 When you find enough cluesSet: The Brothers' War Type: Legendary Artifact Creature Thopter Rarity: Rare Cost: {3} 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, Urza's Battlethopter's power, put a +1 +1 counter on Liberator.