Benefit(s) You can channel your evil ancestry to take advantage of any effects for which such an identity would matter (such as detect evil). You detect as an evil outsider with the same number of HD as you possess. You can begin or end this effect as a swift action. You can maintain this effect for a number of rounds per day equal to your HD.
Pathfinder Player Companion: Agents of Evil © 2015, Paizo Inc.; Author: Thurston Hillman.