Sootfeather Flock is a common Creature — Bird card from Legions (LGN), collector number 82. Current market price: $0.20 (foil $0.59), TCGplayer market prices via Scryfall.
Flying Morph {3}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)