Spellbreaker

(Combat)
You can strike at enemy spellcasters who fail to cast defensively when you threaten them.
 

Prerequisites

Disruptive, 10th-level Fighter.
 

Benefit

Enemies in your threatened area that fail their checks to cast spells defensively provoke attacks of opportunity from you.
 

Normal

Enemies that fail to cast spells defensively do not provoke attacks of opportunity.
 

Combat Trick

If you have a Stamina pool, the following Combat Trick may be used with this feat.
  When you hit a caster with an attack of opportunity it provoked by failing to cast defensively, you can spend 5 Stamina points to daze the caster until the end of its next turn. If the caster succeeds at a Fortitude Save with a DC equal to 10 + your base attack bonus, it is Staggered instead.