Is Nylea, Keen-Eyed legal in Standard, Modern, and Commander?

Nylea, Keen-Eyed is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Nylea, Keen-Eyed

Q: What type of card is Nylea, Keen-Eyed?

Nylea, Keen-Eyed is a Legendary Enchantment Creature — God. Its oracle text reads: "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."