Trusty Boomerang is a uncommon Artifact — Equipment card from Avatar: The Last Airbender (TLA), collector number 260. Current market price: $0.13 (foil $0.25), TCGplayer market prices via Scryfall.
Equipped creature has "{1}, {T}: Tap target creature. Return Trusty Boomerang to its owner's hand." Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)