You are incredibly skilled at fighting with two weapons at the same time.
Prerequisites: Dex 19, Improved Two-Weapon Fighting, Two-Weapon Fighting, base attack bonus +11.
Benefit: You get a third attack with your off-hand weapon, albeit at a –10 penalty.
Section 15: Copyright Notice
Pathfinder RPG Core Rulebook. Copyright 2009, Paizo Publishing, LLC; Author: Jason Bulmahn, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.