Mystic Reflection is a rare Instant card from Kaldheim Promos (PKHM), collector number 69p. Current market price: $1.40 (foil $2.28), TCGplayer market prices via Scryfall.
Choose target nonlegendary creature. The next time one or more creatures or planeswalkers enter this turn, they enter as copies of the chosen creature. Foretell {U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)