Mask Of The Brute (3.5e Equipment)
From D&D Wiki
Mask Of The Brute: This tattered leather mask, when worn, will affix itself to the wearer’s face, requiring a Will save (DC 18) to remove. Once worn, the subject grows about two feet in height, doubles their muscle mass, and is continually affected as if by Tenser’s Transformation until the mask’s removal, at which time the subject’s physical and mental state returns to normal.
Moderate transmutation;CL 12th; Craft Wondrous Item, Tenser’s transformation; Market Price: 144,000 gp