An Over Soul is the metaphysical construct of an apparition using a shaman's furyoku and a medium to gain corporeal properties. An Over Soul 'actualizes' the knowledge and memories of an apparition and allows their memories to manifest essentially as magical powers. They are composed entirely of furyoku and being so, there is no actual matter. An Over Soul can only be damaged by another, this renders all form of conventional weaponry useless, as there is no matter to interact with. While any spirit can be molded into an Over Soul, their attributes depend solely upon the spirit's ego - or identity. Depending on its ego, the ghost can be molded by the shaman into any shape or form the shaman desires, enabling the direct display of its abilities to protect the shaman.