Greater Two-Weapon Fighting
( Masters of the Wild: A Guidebook to Barbarians, Druids, and Rangers, p. 23)[General]
You are a master at fighting two-handed.
Prerequisite
Improved Two-Weapon Fighting (PH) , Ambidexterity, base attack bonus +15, Two- Weapon Fighting,
Benefit
You get a third attack with your off-hand weapon, albeit at a -10 penalty.