Flow State is a uncommon Sorcery card from Secrets of Strixhaven (SOS), collector number 49. Current market price: $1.85 (foil $2.28), TCGplayer market prices via Scryfall.
Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. If there is an instant card and a sorcery card in your graveyard, instead put two of them into your hand and the rest on the bottom of your library in any order.