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 - $1.500
Lightly Played - $1.200
Moderately Played - $1.100
Heavily Played - $900
Damaged - $800
Near Mint Spanish - $1.500
Lightly Played Spanish - $1.200
Moderately Played Spanish - $1.100
Heavily Played Spanish - $900
Damaged Spanish - $800