Is Icefeather Aven legal in Standard, Modern, and Commander?

Icefeather Aven is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Icefeather Aven?

Icefeather Aven is a Creature — Bird Shaman. Its oracle text reads: "Flying Morph {1}{G}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, you may return another target creature to its owner's hand."