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 - $5.80
Lightly Played - $5.20
Moderately Played - $4.60
Heavily Played - $4.10
Damaged - $2.90
NM-Mint Non English - $5.80
Lightly Played Non English - $5.20
Moderately Played Non English - $4.60
Heavily Played Non English - $4.10
Damaged Non English - $2.90