You have trained to fight against a horde of enemies.
Prerequisites
Combat Expertise, base attack bonus +2.
Benefit
You redirect enemy attacks to hamper your other enemies, causing them to stumble over one another when attacking you. When using fighting defensively, taking the total defense action, or using Combat Expertise with at least a -2 penalty to attack rolls, you gain a +1 dodge bonus to AC for every enemy who threatens you after the first. So, if you are threatened by three enemies, you gain a +2 dodge bonus to AC.