Hidden Blade is a rare Artifact — Equipment card from Assassin's Creed (ACR), collector number 307. Current market price: — (foil $0.26), TCGplayer market prices via Scryfall.
Flash When this Equipment enters, attach it to target creature you control. If that creature is an Assassin, it gains deathtouch until end of turn. Equipped creature gets +1/+0 and has first strike. Equip {2}