At the beginning of your end step, you may sacrifice a creature. If you do, look at the top X cards of your library, where X is that creature's mana value. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
Near Mint - £1.90
Lightly Played - £1.60
Moderately Played - £1.30
Heavily Played - £1.00
Damaged - £0.60
Near Mint Non English - £1.90
Lightly Played Non English - £1.60
Moderately Played Non English - £1.30
Heavily Played Non English - £1.00
Damaged Non English - £0.60