Victor Vran

You need the Crying Shame demon power for this. Go to the Dark Ages stage in Motorhead DLC and go down the stairs past the 2 spear wielding succubi. A bunch more of the spear wielding succubi will spawn, and there will be one with wings that looks different. Wait for it to cast a spell (lines will start appearing under it that make a star or demon symbol or some shit) and then go up to her and use the Crying Shame demon power to cancel it for this achievement.