Mathas, Fiend Seeker is a mythic Legendary Creature — Vampire card from Commander 2017 (C17), collector number 42. Current market price: — (foil $0.55), TCGplayer market prices via Scryfall.
Menace At the beginning of your end step, put a bounty counter on target creature an opponent controls. For as long as that creature has a bounty counter on it, it has "When this creature dies, each opponent draws a card and gains 2 life."