If you would lose unspent mana, that mana becomes black instead.
At the beginning of your precombat main phase, look at the top card of your library. You may reveal that card if it has three or more colored mana symbols in its mana cost. If you do, add three mana in any combination of colors and put it into your hand. If you don't reveal it, put it into your hand.
Near Mint - $0.95
Lightly Played - $0.90
Moderately Played - $0.76
Heavily Played - $0.57
Damaged - $0.47
Near Mint Non-English - $0.95
Lightly Played Non-English - $0.90
Moderately Played Non-English - $0.76
Heavily Played Non-English - $0.57
Damaged Non-English - $0.47
Foil Prices
Near Mint Foil - $0.95
Lightly Played Foil - $0.90
Moderately Played Foil - $0.76
Heavily Played Foil - $0.57
Damaged Foil - $0.47
Near Mint Foil Non-English - $0.95
Lightly Played Foil Non-English - $0.90
Moderately Played Foil Non-English - $0.76
Heavily Played Foil Non-English - $0.57
Damaged Foil Non-English - $0.47