GREATER SHIELD SPECIALIZATION [Fighter, Combat]

     Your masterful shield work provides even greater protection to your vital areas.

Prerequisite: Proficiency with selected shield, Greater Shield Focus, Shield Specialization with selected shield, Fighter level 12.

Benefit: Choose one type of shield (buckler, light, heavy, or tower shield) for which you possess the Shield Specialization feat.  With the selected shield, you gain a +2 bonus to your Armor Class against critical hit confirmation rolls (this bonus stacks with that from Shield Specialization).  In addition, once per day you may negate a critical hit, and damage is instead rolled normally.

Special: You can gain this feat multiple times. Its effects do not stack.  Each time you take the feat, it applies to a new type of shield.