Gloomdrifter is a uncommon Creature — Zombie Minion card from Torment (TOR), collector number 61. Current market price: $0.26 (foil $1.86), TCGplayer market prices via Scryfall.
Flying Threshold — As long as there are seven or more cards in your graveyard, this creature has "When this creature enters, nonblack creatures get -2/-2 until end of turn."