Icefeather Aven is a uncommon Creature — Bird Shaman card from Khans of Tarkir (KTK), collector number 178. Current market price: $0.28 (foil $0.59), TCGplayer market prices via Scryfall.
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.