Fox Trickery (Combat)Source Ultimate Intrigue pg. 84
Whenever a foes drops his guard, you can make him suffer with a dirty trick.
Prerequisites: Int 13, Combat Expertise, Fox Insight, Fox Style, Improved Dirty TrickAPG.
Benefit: While using Fox Style, you can perform dirty trick combat maneuvers () as attacks of opportunity. If your Intelligence is at least 19, you gain a +4 bonus on dirty trick combat maneuver checks.