Geth, Thane of Contracts is a rare Legendary Creature — Phyrexian Zombie card from Phyrexia: All Will Be One Promos (PONE), collector number 95p. Current market price: $0.24 (foil $0.25), TCGplayer market prices via Scryfall.
Other creatures you control get -1/-1. {1}{B}{B}, {T}: Return target creature card from your graveyard to the battlefield. It gains "If this creature would leave the battlefield, exile it instead of putting it anywhere else." Activate only as a sorcery.