Incredibly, but managed to find more information about protective devices, that Liches use, while they traveling in the dimension of death. One of the main threats to the Lich are the scraps of clean negative energy, that move by the wind in this dimension. They damage the mind of the Lich and he is going mad. The destruction of the body is not critical for the Lich, he will be able to go back, even if it will be only the head. In order to protect the Lich's head was developed a protective he...