Vraan, Executioner Thane is a rare Legendary Creature — Phyrexian Vampire card from Phyrexia: All Will Be One Promos (PONE), collector number 114p. Current market price: $0.83 (foil $1.35), TCGplayer market prices via Scryfall.
Whenever one or more other creatures you control die, each opponent loses 2 life and you gain 2 life. This ability triggers only once each turn.