Anthousa, Setessan Hero is a rare Legendary Creature — Human Warrior card from Theros Promos (PTHS), collector number 149★. Current market price: — (foil $0.30), TCGplayer market prices via Scryfall.
Heroic — Whenever you cast a spell that targets Anthousa, up to three target lands you control each become 2/2 Warrior creatures until end of turn. They're still lands.