Daydream is a uncommon Sorcery card from Secrets of Strixhaven (SOS), collector number 9. Current market price: $0.32 (foil $0.39), TCGplayer market prices via Scryfall.
Exile target creature you control, then return that card to the battlefield under its owner's control with a +1/+1 counter on it. Flashback {2}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)