Ghostfire Blade is a rare Artifact — Equipment card from Khans of Tarkir (KTK), collector number 220. Current market price: $0.24 (foil $0.37), TCGplayer market prices via Scryfall.
Equipped creature gets +2/+2. Equip {3} This Equipment's equip ability costs {2} less to activate if it targets a colorless creature.