Concussion Attack

Sneak attack +3d6,

Your successful sneak attack imposes a 2 penalty on the target's Intelligence and Wisdom checks, as well as on any Intelligence and Wisdom-based skill checks, for 10 rounds. If you use this feat a second time on a target before 10 rounds have elapsed, the effect of the first use expires. Using this feat reduces your sneak attack damage by 2d6.

Your successful sneak attack imposes a -2 penalty on the target’s Intelligence and Wisdom checks, as well as on any Intelligence and Wisdom-based skill checks, for 10 rounds. If you use this feat a second time on a target before 10 rounds have elapsed, the effect of the first use expires. Using this feat reduces your sneak attack damage by 2d6.

Your attacks can damage your opponent’s ability to think clearly.