Hades's Cap of Invisibility (ハデスの隠れ兜, Hadesu no Kakure Kabuto?), also called the Cloth of Concealment (身隠しの布, Mikakushi no Nuno?), is the cap of invisibility owned by Hades. It is the prototype of all Noble Phantasms that “hides the figure.” Normally kept by Gilgamesh in the form of a sash, anything covered or enclosed by the cloth cannot be observed through magecraft and optical means. Using optical magic to block all forms of magical detection and any presence of magical emanations from the wearer, it is incredibly effective against those relying solely on magecraft to detect enemies. It does not obscure sound, smell, body temperature, or the wearer's tracks, so its usage is mostly situational. Without such indicators being readily apparent, it is possible to easily walk by enemies while