Bloodthirsty Blade is a uncommon Artifact — Equipment card from Murders at Karlov Manor Commander (MKC), collector number 225. Current market price: $0.40, TCGplayer market prices via Scryfall.
Equipped creature gets +2/+0 and is goaded. (It attacks each combat if able and attacks a player other than you if able.) {1}: Attach this Equipment to target creature an opponent controls. Activate only as a sorcery.