You can judge the timing of an opponent's melee attacks and how to block them.
Prerequisite: Int 13+, Combat Expertise.
Benefit: During your action, you can designate one opponent as a free action that does not provoke an attack of opportunity. You may add your Intelligence bonus as a dodge bonus to your defence against melee attacks made by that opponent. A condition that makes you lose your Dexterity bonus (if any) to defence also makes you lose dodge bonuses. Also, dodge bonuses stack with each other.