Sustained Trick (Combat)

You can make a dirty trick last longer.

Prerequisite: Int 15, Combat Expertise, Improved Dirty Trick, base attack bonus +6.

Benefit: In place of an attack action, you can attempt to increase the duration of a dirty trick a creature has sustained. A successful CMB check (using the same base attack bonus as the attack action given up) means the duration of an existing dirty trick is increased by 1 round.