Mind's Desire is a rare Sorcery card from Scourge (SCG), collector number 41. Current market price: $3.31 (foil $80.00), TCGplayer market prices via Scryfall.
Shuffle your library. Then exile the top card of your library. Until end of turn, you may play that card without paying its mana cost. Storm (When you cast this spell, copy it for each spell cast before it this turn.)