Nylea, Keen-Eyed is a mythic Legendary Enchantment Creature — God card from Theros Beyond Death Promos (PTHB), collector number 185p. Current market price: $6.46 (foil $9.89), TCGplayer market prices via Scryfall.
Indestructible As long as your devotion to green is less than five, Nylea isn't a creature. Creature spells you cast cost {1} less to cast. {2}{G}: Reveal the top card of your library. If it's a creature card, put it into your hand. Otherwise, you may put it into your graveyard.