Know you any devout pious types who spend their days all "My heart knows only the will of the gods!" or "Simply cleanse yourself in the glow of the Loving Light!" or "Know Drachnor, Know Peace!" but then you see them out at a tavern later stabbing a bar gnome or something? That's gargoyles. By day they guard the grand cathedrals dotting these lands, then they take to the caverns and dungeons to throw a granite fist through your face at the slightest provocation. Terrible.