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 - $1.400
Lightly Played - $1.100
Moderately Played - $1.000
Heavily Played - $800
Damaged - $700
Near Mint Spanish - $1.400
Lightly Played Spanish - $1.100
Moderately Played Spanish - $1.000
Heavily Played Spanish - $800
Damaged Spanish - $700