Willam the Conqueror's Scabbard

Origin
William the Conqueror was the first Norman king of England, reigning from 1066 until his death in 1087. The descendant of Viking raiders, he had been Duke of Normandy since 1035. After a long struggle to establish his power, by 1060 his hold on Normandy was secure, and he launched the Norman conquest of England in 1066. William defeated a claimant to the English throne, Harold Godwinson, at the Battle of Hastings, being crowned king with little resistance. The rest of his life was marked by struggles to consolidate his hold over England and his continental lands and by difficulties with his eldest son.

Effects
Enables the wielder of the scabbard to control a person’s free will, but damages the users muscular system.