Scorpion Style (Combat)
You can perform an unarmed strike that greatly hampers your target’s movement.
Prerequisite: Proficiency with unarmed strikes
Benefit (Wis): To use this feat, you must make a single unarmed attack as a standard action. If this unarmed attack hits, you deal damage normally, and the target’s base land speed is reduced to 5 feet for a number of rounds equal to your Wisdom modifier unless it makes a Fortitude saving throw.
(BAB +6; Wis): As a standard action, make a single unarmed melee attack against a foe whose speed is reduced. If the attack hits, you deal damage normally and the target is staggered until the end of your next turn unless it makes a Fortitude saving throw. This feat has no effect on targets that are staggered.
(BAB +11): Whenever you use the full-attack action and make at least one unarmed strike, you can make two additional unarmed strikes at your highest base attack bonus. These bonus attacks must be made against a dazed, flat-footed, paralyzed, staggered, stunned, or unconscious foe.