Shuriken is a uncommon Artifact — Equipment card from The List (PLST), collector number BOK-160. Current market price: $0.16, TCGplayer market prices via Scryfall.
Equipped creature has "{T}, Unattach Shuriken: Shuriken deals 2 damage to target creature. That creature's controller gains control of Shuriken unless it was unattached from a Ninja." Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)