At the beginning of your end step, you may sacrifice a creature. If you do, look at the top X cards of your library, when 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 - $3.90
Lightly Played - $3.10
Moderately Played - $2.70
Heavily Played - $2.40
Damaged - $2.00
Near Mint Spanish - $3.90
Lightly Played Spanish - $3.10
Moderately Played Spanish - $2.70
Heavily Played Spanish - $2.40
Damaged Spanish - $2.00