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 - $4.25
Near Mint Non-English - $4.25
Lightly Played - $4.00
Lightly Played Non-English - $4.00
Moderately Played - $3.50
Moderately Played Non-English - $3.50
Heavily Played - $2.50
Heavily Played Non-English - $2.50
Damaged - $2.25
Damaged Non-English - $2.25