Crib Swap is a common Kindred Instant — Shapeshifter card from Double Masters (2XM), collector number 12. Current market price: $0.26 (foil $0.25), TCGplayer market prices via Scryfall.
Changeling (This card is every creature type.) Exile target creature. Its controller creates a 1/1 colorless Shapeshifter creature token with changeling.