Dating back to the days of Dimwit Flathead, the maidenhead, as it is known to enemies of the Flathead Dynasty, it a deceptively simple iron cap. It employed the traditionally lethal technique of the iron maiden, to the head of the victim only, so that the effect became one of instant flat-headedness. And of course, death.

In the mid-eleventh century, this, along with other useful technologies that had not been used since the reign of Dimwit, were retrieved by Wartle. Mir Yannick used this device to murder Syovar III, and nearly Dalboz of Gurth.

SOURCE(S): Zork: Grand Inquisitor (official strategy guide)