Make Your Own Luck is a uncommon Sorcery card from Outlaws of Thunder Junction (OTJ), collector number 371. Current market price: $0.24 (foil $0.40), TCGplayer market prices via Scryfall.
Look at the top three cards of your library. You may exile a nonland card from among them. If you do, it becomes plotted. Put the rest into your hand. (You may cast it as a sorcery on a later turn without paying its mana cost.)