Ayara, First of Locthwain is a rare Legendary Creature — Elf Noble card from Throne of Eldraine Promos (PELD), collector number 75p. Current market price: $10.52 (foil $37.55), TCGplayer market prices via Scryfall.
Whenever Ayara or another black creature you control enters, each opponent loses 1 life and you gain 1 life. {T}, Sacrifice another black creature: Draw a card.