Fujutsushiki

Fujutsushiki (巫術式, "Shamanic Technique") is the ultimate form of Furyoku manipulation and a Shaman's greatest weapon in battle. Forging a Fujutsushiki requires a Shaman to fashion their Guardian Spirit to their weapon, which creates a metaphysical construct that reflects the Spirit's experience and memories, allowing their Shaman to utilize their full power.

Description
A Shaman's Fujutsushiki is considered the benchmark of their abilities because it requires perfect synchronization between a Shaman and their Guardian Spirit. After getting used to using Fuhyōi, a Shaman must recognize their own weaknesses and devise a way to go beyond those limitations.

A Shaman's Furyoku is limited by their own memories and experiences. Spirits on the other hand usually exist for long periods of time and have gained exceptional amounts of knowledge and experience. However, Guardian Spirits can only take a physical form by using their Shaman's Furyoku as a base.

By infusing a physical item with Furyoku bonded to their Guardian Spirit, Shamans can draw greater power their partner's memories and experiences. The Guardian Spirit takes a metaphysical form that overlaps the Shaman's item with their Furyoku based body, granting the Shaman a new more powerful ability known as a Fujutsushiki.

Types
There are three types of Fujutsushiki: Weapon-type, Armor-type, and Summon-type.

Weapon-type: Jujutsushiki that shrouds the user's weapon in Furyoku, changes its shape, and further enhances its abilities in some way or another. (UNCOMMON)

Armor-type: Jujutsushiki that shroud the user's entire body in Furyoku, granting them protective armor with mystical properties. (RARE)

Summon-type: Jujutsushiki that allow Guardian Spirit's to manifest entire bodies. Their Furyoku is still reliant on their Shaman's Furyoku as well as the item that was used to summon them. (SUPER RARE)