Needs review
Source: Way of the Open Hand

Description: You have mastered the precepts of Tenshido and started creating your own variants.

Prerequisites: Base Attack Bonus +4, WIS 13, Improved Unarmed Strike, Tenshido Novice, Tenshido Intermediate

Required for: Tenshido Expert, Tenshido Master

If you have readied an attack action in response to an opponent's melee attack against you and you use this attack action to make a trip attack, you gain a +4 bonus to your attack roll and a +4 bonus to your Strength check to trip your opponent.