Merciless Butchery

Combat

Your talent for slaughter lets you dispatch helpless opponents before they can recover.

Prerequisite: Dastardly Finish, sneak attack +5d6, studied target† class feature.

Benefit: As a standard action that does not provoke attacks of opportunity, you can attempt a coup de grace against a cowering, helpless, or stunned opponent that you have designated as your studied target.

Source: Advanced Class Guide