Fox Trickery

Combat

Whenever a foes drops his guard, you can make him suffer with a dirty trick.

Prerequisite: Int 13, Combat Expertise, Fox Insight†, Fox Style†, Improved Dirty Trick.

Benefit: While using Fox Style, you can perform dirty trick combat maneuvers (Pathfinder RPG Advanced Player’s Guide 320) as attacks of opportunity. If your Intelligence is at least 19, you gain a +4 bonus on dirty trick combat maneuver checks.

Source: Ultimate Intrigue