Razor Boomerang is a uncommon Artifact — Equipment card from Worldwake (WWK), collector number 129. Current market price: $0.25 (foil $0.36), TCGplayer market prices via Scryfall.
Equipped creature has "{T}, Unattach Razor Boomerang: It deals 1 damage to any target. Return Razor Boomerang to its owner's hand." Equip {2}