Mortarion, Daemon Primarch is a rare Legendary Creature — Demon Primarch card from Warhammer 40,000 Commander (40K), collector number 41★. Current market price: — (foil $7.57), TCGplayer market prices via Scryfall.
Flying Primarch of the Death Guard — At the beginning of your end step, you may pay {X}. If you do, create X 2/2 black Astartes Warrior creature tokens with menace. X can't be greater than the amount of life you lost this turn.