Aerith Gainsborough is a rare Legendary Creature — Human Cleric card from Final Fantasy Promos (PFIN), collector number 4s. Current market price: — (foil $22.43), TCGplayer market prices via Scryfall.
Lifelink Whenever you gain life, put a +1/+1 counter on Aerith Gainsborough. When Aerith Gainsborough dies, put X +1/+1 counters on each legendary creature you control, where X is the number of +1/+1 counters on Aerith Gainsborough.