Sky Scourer is a common Creature — Eldrazi Drone card from Oath of the Gatewatch (OGW), collector number 78. Current market price: $0.09 (foil $0.20), TCGplayer market prices via Scryfall.
Devoid (This card has no color.) Flying Whenever you cast a colorless spell, this creature gets +1/+0 until end of turn.