The Wind Crystal is a rare Legendary Artifact card from Final Fantasy (FIN), collector number 43. Current market price: $7.75 (foil $9.98), TCGplayer market prices via Scryfall.
White spells you cast cost {1} less to cast. If you would gain life, you gain twice that much life instead. {4}{W}{W}, {T}: Creatures you control gain flying and lifelink until end of turn.