Anthousa, Setessan Hero is a rare Legendary Creature — Human Warrior card from Theros (THS), collector number 149. Current market price: $0.21 (foil $0.31), 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.