Glissa, the Traitor is a mythic Legendary Creature — Phyrexian Zombie Elf card from Mirrodin Besieged Promos (PMBS), collector number 96★. Current market price: — (foil $2.47), TCGplayer market prices via Scryfall.
First strike, deathtouch Whenever a creature an opponent controls dies, you may return target artifact card from your graveyard to your hand.