Covering Defense

Combat

You are skilled at protecting yourself and your allies with your shield.

Prerequisite: Shield Focus, base attack bonus +6.

Benefit: When you use the total defense action while using a light, heavy, or tower shield, you can provide a cover bonus to AC against all attacks to an adjacent ally your size or smaller. This cover bonus is equal to your shield’s shield bonus and lasts until the beginning of your next turn. Your shield does not provide a cover bonus to Reflex saves. they become dazed for a number of rounds equal to the original level of the spell. If the spell allows a saving throw, a successful save negates the daze effect. If the spell does not allow a save, the target can make a Will save to negate the daze effect. If the spell effect also causes the creature to become dazed, the duration of this metamagic effect is added to the duration of the spell. A dazing spell uses up a spell slot three levels higher than the spell’s actual level. Spells that do not inflict damage do not benefit from this feat.

Source: Advanced Player's Guide