Needs review
Source: Complete Warrior

Description: You have mastered the style of fighting with a quarterstaff, and have learned special maneuvers that complement this unique weapon.

Prerequisites: Dodge, Combat Expertise, Two-Weapon Fighting, Weapon Focus (Quarterstaff)

When you use Combat Expertise to gain a dodge bonus while wielding a quarterstaff, you gain a dodge bonus 2 points higher than the penalty you take on your attack rolls. For example, if you take a -1 penalty on your attack rolls, you gain a +3 dodge bonus to your AC.