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.
NM-Mint - $4.50
Lightly Played - $4.10
Moderately Played - $3.60
Heavily Played - $3.20
Damaged - $2.30
NM-Mint Non English - $4.50
Lightly Played Non English - $4.10
Moderately Played Non English - $3.60
Heavily Played Non English - $3.20
Damaged Non English - $2.30