Greater Two-Weapon Fighting

Type of Feat: General
Prerequisite: Improved Two-Weapon Fighting, Two-Weapon Fighting, Ambidexterity, base attack bonus +15.
Specifics: You are a master at fighting two-handed. While using Greater Two Weapon Fighting a player can make an third off-hand attack per round.
A Tempest gains Greater Two-Weapon Fighting for free at level 5. She loses this special ability when fighting in medium or heavy armor, or when using a double weapon (such as a two-bladed sword).
Use: Automatic.