Greater Shield Specialization (Combat)Source Advanced Player's Guide pg. 162 Your masterful shieldwork provides even greater protection to your vital areas.
  Prerequisites: Proficiency with selected shield, Greater Shield Focus, Shield Focus, Shield Specialization with selected shield, fighter level 12th.
  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.Source Pathfinder Unchained pg. 121 You can spend 5 stamina points to use your selected shield to negate a critical hit a second time each day.
         |