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 - £2.30
Lightly Played - £1.90
Moderately Played - £1.60
Heavily Played - £1.20
Damaged - £0.70
Near Mint Non English - £2.30
Lightly Played Non English - £1.90
Moderately Played Non English - £1.60
Heavily Played Non English - £1.20
Damaged Non English - £0.70