Sky Scourer [Oath of the Gatewatch]

Set: Oath of the Gatewatch Type: Creature — Eldrazi Drone Rarity: Common Cost: {1}{B} Devoid (This card has no color.)FlyingWhenever you cast a colorless spell, Sky Scourer gets +1/+0 until end of turn. "The Eldrazi are nothing if not thorough." —Jace Beleren