Over Soul

The Over Soul represents the ultimate form of furyoku manipulation for a Shaman

About
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 real matter. This renders all form of conventional weaponry useless, as only an Over Soul can damage another. While any spirit can be molded into an Over Soul, their attributes depend solely upon the spirit's ego--or identity. Depending on their ego, the ghost can be molded by the shaman into any shape or form the shaman desires, enabling the direct display of their abilities to protect the shaman.

Human ghosts usually make poor choices for an Over Soul due to their ego's, but can evolve over time into higher spirits - spirits whose souls have been refined for over hundreds of years and attained their purest form. While the exact design of an Over Soul depends entirely on the shaman's imagination, it's also important that the shaman uses a medium which best symbolize the spirit's abilities, such as a Katana for Amidamaru, a samurai.

In regards to strength & integrity, an Over Soul's durability is proportionate the amount of furyoku charged as well as the shaman's level of concentration. It is important for the shaman to keep in mind that although the mass of an Over Soul remains constant, furyoku is consumed anytime it is used to create matter, like ice, which consumes furyoku in itself. Furyoku is only consumed when the "body" of the Over Soul is compromised. At this juncture, the Over Soul is charged with the proportionate amount of furyoku necessary to sustain an Over Soul, depending on the level of damage sustained. If an Over Soul absorbs enough damage it break, and not only will an Over Soul end, but all furyoku used to create itself will disappear as well. Therefore, a shaman must consider how much furyoku to charge their Over Soul with for their situation.

The sizes and shapes of certain character's O.S. often change since their introductions, some without any explanation. This could be attributed to the mental imagery a shaman uses to envision the form, size and ability of the Over Soul. Yoh's Spirit of Sword, for instance, has changed throughout the series since being introduce in volume 15 of the manga, with a defined blade and the inclusion of a large hilt.

Spirits themselves have three sub-categories


 * Ghost-type: Normal-class spirit ally
 * Seirei-type: Master-class spirit ally
 * Kami-type: God-class spirit ally

Types of Oversouls
Generally speaking, O.S. (Over Souls) can be divided into three (3) categories: Spirit-types, Weapon-types, and Armor-types. The classification of an O.S. doesn't necessarily mean it will be more effective than a lower-class O.S., just more difficult to sustain, making the overall effectiveness of any O.S. is largely based on individual talent.

Spirit-type Oversoul
Spirit-type O.S. ususally manifests an apparition corporeally in such a manner as to fully utilize their unique abilities. (ie. O.S. Bason, O.S. Kororo-Snowboard).

Weapon-type Oversoul
Weapon-type O.S. manifests an apparition in their purest form, usually as a supernatural armament (ie. O.S. Spirit of Sword, O.S. Kororo-Ikupasuy, O.S. Super Bushin), usually to compliment the shaman's personal fighting style. Weapon-type are incredibly versatile and are possbile with Seirei-type apparitions.

Armor-type Oversoul
Armor-type Over Souls are the most efficient type. Armor-types represent the pinnacle of O.S. magic and are the most practical form of an Over Soul as they are virtually impervious to attack due to their highly-density of furyoku, and are equally formidable in terms of raw power.

Unity-type Oversoul/Oversoul Merge
This the Over Soul merge which the Shaman make sure they and the ghost are one and the same. The only example of this was Chocolove McDonell and Mic the Jaguar. It is very difficult to pull off since both the ghost and the shaman must be synced the entire time the Over Soul is used. The advantage is that the ghost is fully used in the battle and a direct use of all abilities of both shaman and ghost.