abjuration 

Traditions arcane, divine, occult, primal

Cast [R] somatic, verbal; Trigger A foe within range casts a 9th-level or lower spell.

Range 120 feet; Targets the triggering spell

You instantly destroy the incoming spell, though at the cost of sending magical feedback through your body. You automatically counteract the spell, but the feedback brings you unavoidable harm. You lose 1d8 Hit Points per level of the triggering spell.

Secrets of Magic, page 118.