Glamdring is a mythic Legendary Artifact — Equipment card from The Hobbit Commander (HOC), collector number 42. Current market price: $3.60 (foil $3.74), TCGplayer market prices via Scryfall.
Equipped creature has first strike and gets +1/+0 for each instant and sorcery card in your graveyard. Whenever equipped creature deals combat damage to a player, you may cast an instant or sorcery spell from your hand with mana value less than or equal to that damage without paying its mana cost. Equip {3}