At the beginning of you r second main phase, look at the top X cards of your library, where X is the total amount of life your opponent lost this turn. Exile one of those cards and put the rest on the bottom of your library in a random order. You may play the exile card this turn.
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