Sludge Crawler is a common Creature — Eldrazi Drone card from Battle for Zendikar (BFZ), collector number 98. Current market price: $0.21 (foil $0.49), TCGplayer market prices via Scryfall.
Devoid (This card has no color.) Ingest (Whenever this creature deals combat damage to a player, that player exiles the top card of their library.) {2}: This creature gets +1/+1 until end of turn.