Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.
Near Mint - $38.30
Lightly Played - $30.70
Moderately Played - $26.80
Heavily Played - $23.00
Damaged - $19.20
Near Mint Spanish - $38.30
Lightly Played Spanish - $30.70
Moderately Played Spanish - $26.80
Heavily Played Spanish - $23.00
Damaged Spanish - $19.20