Kaspar Hauser's Knife

Origin
Kaspaur Hauser was a German youth who claimed to have grown up in the total isolation of a darkened cell. With almost no contact, he slept on a hay bed and was given food and water and cleaned by a mysterious man. Hauser's claims, and his subsequent death by stabbing, sparked much debate and controversy. Theories propounded at the time linked him with the grand ducal House of Baden, although most historians doubt it.

Effects
When cut by the knife, it takes your memories and stores them in the knife, making you forget who you are. To disable this artifact you must stab the person to restore memory or submerge it in Neutralizer.