Flock Impostor is a uncommon Creature — Shapeshifter card from Lorwyn Eclipsed (ECL), collector number 16. Current market price: $0.25 (foil $0.33), TCGplayer market prices via Scryfall.
Changeling (This card is every creature type.) Flash Flying When this creature enters, return up to one other target creature you control to its owner's hand.