Flusterstorm CMD-46/5075 (The List Reprints)

Counter target instant or sorcery spell unless its controller pays {1}. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

NM - $26.00
LP - $21.00
MP - $15.50
HP - $10.50
DMG - $5.50