Is Nyxborn Wolf legal in Standard, Modern, and Commander?

Nyxborn Wolf is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper.

Nyxborn Wolf

Q: What type of card is Nyxborn Wolf?

Nyxborn Wolf is an Enchantment Creature — Wolf. Its oracle text reads: "Bestow {4}{G} (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.) Enchanted creature gets +3/+1. Power/Toughness: 3/1"

Enchantment Creature — Wolf

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.)