Skittering Precursor is a uncommon Creature — Eldrazi Drone card from Modern Horizons 3 (MH3), collector number 137. Current market price: $0.18 (foil $0.29), TCGplayer market prices via Scryfall.
Devoid (This card has no color.) Menace Whenever you sacrifice a nontoken permanent, create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this token: Add {C}."