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 - $900
Lightly Played - $700
Moderately Played - $600
Heavily Played - $500
Damaged - $500
Near Mint Spanish - $900
Lightly Played Spanish - $700
Moderately Played Spanish - $600
Heavily Played Spanish - $500
Damaged Spanish - $500