Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.
Near Mint - $3.50
Lightly Played - $2.80
Moderately Played - $2.50
Heavily Played - $2.10
Damaged - $1.80
Near Mint Spanish - $3.50
Lightly Played Spanish - $2.80
Moderately Played Spanish - $2.50
Heavily Played Spanish - $2.10
Damaged Spanish - $1.80