Dredging Claw is a common Artifact — Equipment card from The Brothers' War (BRO), collector number 119. Current market price: $0.20 (foil $0.17), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 and has menace. (It can't be blocked except by two or more creatures.) Whenever a creature enters from your graveyard, you may attach this Equipment to it. Equip {1}{B} ({1}{B}: Attach to target creature you control. Equip only as a sorcery.)