Strangler

Combat

Throttling the life out of enemies is second nature to you.

Prerequisite: Dex 13, sneak attack +1d6, Improved Grapple, Improved Unarmed Strike.

Benefit: Whenever you successfully maintain a grapple and choose to deal damage, you can spend a swift action to deal your sneak attack damage to the creature you are grappling.

Source: Ultimate Combat