Unexpected Windfall is a common Instant card from Adventures in the Forgotten Realms (AFR), collector number 164. Current market price: $2.65 (foil $5.04), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, discard a card. Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.")