Two-Weapon Defense
Prerequisites: Two-Weapon Fighting, Base Attack Bonus +1
Benefit: While you are wielding two weapons and wearing light or no armor, you gain a shield bonus to your AC equal to your Base Attack Bonus, to a maximum of +5
Normal: You suck at dodging while wearing light or no armor


Improved Two-Weapon Defense
Prerequisites: Two-Weapon Fighting, Two-Weapon Defense, Base Attack Bonus +6
Benefit: While you are wielding two weapons and wearing light or no armor, you gain a shield bonus to your AC equal to your Base Attack Bonus, to a maximum of +10
Normal: A character with the Two-Weapon Defense feat can only receive up to a +5 shield bonus to her AC


Greater Two-Weapon Defense
Prerequisites: Two-Weapon Fighting, Two-Weapon Defense, Improved Two-Weapon Defense, Base Attack Bonus +11
Benefit: While you are wielding two weapons and wearing light or no armor, you gain a shield bonus to your AC equal to your Base Attack Bonus, to a maximum of +15
Normal: A character with the Improved Two-Weapon Defense feat can only receive up to a +10 shield bonus to her AC


Two-Weapon Rend
Prerequisites: Two-Weapon Fighting, Base Attack Bonus +6
Benefit: When you hit a character with both your main hand and your off hand weapon in the same attack action, you can unbalance your opponent and use that to your advantage. You may either make a Bull Rush attempt or a Trip attempt as a free action that does not require a touch attack or provoke an attack of opportunity. If you fail your Trip attempt, your opponent does not get to trip you. You receive a bonus on either check equal to the total enhancement bonus of both weapons you wield.