Exile the top X cards of your library. For each instant and sorcery card with converted mana cost X or less among them, you may cast that card without paying its mana cost. Then put all cards exiled this way that weren't cast into your graveyard.
Near Mint - $0.90
Near Mint Non-English - $0.90
Lightly Played - $0.80
Lightly Played Non-English - $0.80
Played - $0.60
Played Non-English - $0.60
Heavily Played - $0.50
Heavily Played Non-English - $0.50
Damaged - $0.50
Damaged Non-English - $0.50