An item known to be only worn by The Man in the Iron Mask. His voice alone could be heard through the mask to tell something about him, that of being a male. The head that emerged from his gorgeously embroidered robe was fully contained by an iron mask. Iron seems to be a weakness for vampires in general, Iron Arrows have the ability to kill Nobility if shot through the heart. If the wound is left unattended in another area the internal organs will begin to rot away. So iron may be an affective way to contain fledgling vampires at the very least which the man in the iron mask makes use of.