Strike It Rich is a uncommon Sorcery card from Modern Horizons 2 Timeshifts (H2R), collector number 12. Current market price: $3.82 (foil $5.31), TCGplayer market prices via Scryfall.
Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)