Gorgon Flail is a uncommon Artifact — Equipment card from Magic 2010 (M10), collector number 211. Current market price: $0.46 (foil $8.23), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+1 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy that creature.) Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)