Two-Weapon Fighting, Perfect (Feat)
You have studied so intently with your chosen fighting style, you are actually better at attacking with your off-hand than you are with your main hand.
Prerequisites: Level 26, Two-Weapon Fighting, Greater (Feat), Two-Weapon Fighting, Improved (Feat), Two-Weapon Fighting (Feat)
Benefit: By taking this feat you get a fourth attack with your off-hand weapon along with your second attack in your full attack action, at the same penalty to your BAB as your main-hand second attack (normally -5). Yes, this means you can attack three times with your second attack action.
The extra attacks with the off-hand weapon can be made against the same target you attack with your main hand, or a different target within reach.
Because the extra attacks with your off-hand weapon are performed using the first and second attack actions of your full attack, anything that causes you to lose or use up any of these attack actions would also prevent you from gaining the respective extra attack with your off-hand. For example, trading away your second attack to make a five foot step would disallow all three attacks with your main hand and your off hand.
Normal: Your fourth attack with a given hand is made at -15 to-hit. But this is an Epic Feat, and is just that good.
Circumstances Primary Hand Off-Hand Off-hand weapon is NOT light. -6 -10 Off-hand weapon is light -4 -8 Off-hand weapon is NOT light, and Two-Weapon Fighting feat -4 -4 Off-hand weapon is NOT light, and Improved Two-Weapon Fighting feat -2 -2 Off-hand weapon is NOT light, and Greater Two-Weapon Fighting feat -1 -1 Off-hand weapon is NOT light, and Perfect Two-Weapon Fighting feat -0 -0 Off-hand weapon is light and Two-Weapon Fighting feat -2 -2 Off-hand weapon is light and Improved Two-Weapon Fighting feat -1 -1 Off-hand weapon is light and Greater Two-Weapon Fighting feat -0 -0 Off-hand weapon is light and Perfect Two-Weapon Fighting feat -0 -0