At the beginning of your end step, if you control a creature, look at the top seven cards of your library. Then you may sacrifice a creature. If you do, you may put a creature card with mana value X or less from among those cards onto the battlefield, where X is 1 plus the sacrificed creature's mana value. Put the rest on the bottom of your library in a random order.
Near Mint - $4.200
Lightly Played - $3.400
Moderately Played - $2.900
Heavily Played - $2.500
Damaged - $2.100
Near Mint Spanish - $4.200
Lightly Played Spanish - $3.400
Moderately Played Spanish - $2.900
Heavily Played Spanish - $2.500
Damaged Spanish - $2.100
Foil Prices
Near Mint Foil - $14.300
Lightly Played Foil - $11.500
Moderately Played Foil - $10.000
Heavily Played Foil - $8.600
Damaged Foil - $7.200
Near Mint Foil Spanish - $14.300
Lightly Played Foil Spanish - $11.500
Moderately Played Foil Spanish - $10.000
Heavily Played Foil Spanish - $8.600
Damaged Foil Spanish - $7.200