Manifest the top card of your library, then put X +1/+1 counters on it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
Near Mint - $320
Near Mint Spanish - $320
Lightly Played - $290
Lightly Played Spanish - $290
Moderately Played - $240
Moderately Played Spanish - $240
Heavily Played - $200
Heavily Played Spanish - $200
Damaged - $130
Damaged Spanish - $130
Foil Prices
Near Mint Foil - $600
Near Mint Foil Spanish - $600
Lightly Played Foil - $540
Lightly Played Foil Spanish - $540
Moderately Played Foil - $450
Moderately Played Foil Spanish - $450
Heavily Played Foil - $360
Heavily Played Foil Spanish - $360
Damaged Foil - $240
Damaged Foil Spanish - $240