Mirin Dajo's Rib Bone

Origin
Mirin Dajo was the pseudonym of a Dutch man named Arnold Gerrit Henskes (August 6, 1912 – May 26, 1948). Arnold specifically asked not to be called a fakir.

He became famous for radically piercing his body with all kinds of objects and apparently without injury, even astounding the medical community at the time.

Effect
This rib bone was accidentally pierced by a rapier during his act. When held, the user can survive being stabbed by any object. After use, the user will suffer from large amounts of fatigue.