Ayli, Eternal Pilgrim is a rare Legendary Creature — Kor Cleric card from Oath of the Gatewatch Promos (POGW), collector number 151s. Current market price: — (foil $8.61), TCGplayer market prices via Scryfall.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) {1}, Sacrifice another creature: You gain life equal to the sacrificed creature's toughness. {1}{W}{B}, Sacrifice another creature: Exile target nonland permanent. Activate only if you have at least 10 life more than your starting life total.