Improved Back to Back

(Teamwork)
After much practice, you and an ally have become adept at fighting in close proximity to one another.
 

Prerequisites

Back to Back, Perception 5 ranks.
 

Benefit

While you are adjacent to an ally who is Flanked and also has this feat, you can spend a Swift Action to gain a +2 bonus to AC against all flankers until the start of your next turn.
 

Required For