Back To Back
You aren’t as easy to hit when surrounded.
Preqrequisite
Perception 3 ranks.
Benefit
You gain a +1 circumstance bonus to KAC against attacks from foes that flank you. If either foe has a CR that’s equal to or higher than your level, you don’t gain this bonus.
Teamwork Benefit
If you’re adjacent to an ally who also has this feat, you instead gain a +2 circumstance bonus to KAC against attacks from foes that flank you, and you gain this bonus no matter the CR of your opponents.
Source
Fly Free or Die: Crash And Burn pg. 52
Dragonscript
ID
4096089f086fdc0f2ca5d77dPreqrequisite
condition character.perception.ranks >= 3;
