Is Hopeful Eidolon legal in Standard, Modern, and Commander?

Hopeful Eidolon is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Hopeful Eidolon

Q: What type of card is Hopeful Eidolon?

Hopeful Eidolon is an Enchantment Creature — Spirit. Its oracle text reads: "Bestow {3}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)Lifelink (Damage dealt by this creature also causes you to gain that much life.)Enchanted creature gets +1/+1 and has lifelink."

Enchantment Creature — Spirit

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)<br>Lifelink (Damage dealt by this creature also causes you to gain that much life.)<br>Enchanted creature gets +1/+1 and has lifelink.