Mithril Coat is a rare Legendary Artifact — Equipment card from Tales of Middle-earth Promos (PLTR), collector number 245s. Current market price: — (foil $36.39), TCGplayer market prices via Scryfall.
Flash Indestructible When Mithril Coat enters, attach it to target legendary creature you control. Equipped creature has indestructible. Equip {3}