Rise of the Runelords
This mask is crafted from preserved sections harvested from several different human faces, draped one over another almost like scales and leaving the eyes and mouth exposed—-the overall effect is similar to that of a scaled skull. When worn, the mask desaturates the wearer’s color, making him appear shadowy and insubstantial and granting a +5 competence bonus on Stealth checks.
Once per day as a full-round action, the wearer may cause the mask’s features to take on the appearance of any creature of the wearer’s basic size and shape within 60 feet that he observes, allowing the wearer to adopt that creatures appearance and giving him a +10 bonus on Disguise checks made to appear as the creature. As long as he wears this guise, the wearer gains a +2 bonus on attack rolls and weapon damage rolls made against the creature he is disguised as, as the mask builds upon the wearer’s rage and jealousy of the target’s appearance.
Found on the ghoul Aldern Foxglove after his death during the party’s investigation of the Skinsaw murders.