Secret Technique: Soul Assimilation

This technique can only be used on a deceased target, and only within one hour following their death. Yūmei Kokūzō temporarily resurrects the target via the Outer Path, although only in a comatose state, before utilizing as combination of the Human and Preta Paths to tear out their soul and chakra, before assimilating both elements into himself through a seal; this seal essentially manifests on the entirety of Yūmei's body, flashing a bright crimson when activated for this technique, and this technique alone, allowing for near-instantaneous assimilation, and a full body-metamorphosis of physiologies both merging, and adapting to one another.

The process itself is painful at first, with cells reconstructing themselves and the resident sequence of nucleotides rapidly re-encoded on the spot, not necessarily 'changing' Yūmei, but rather making him 'whole' again, simply rewriting his genetic instructions, essentially improving upon what he 'formally' was.

Following complete assimilation, the target's chakra is added to Yūmei's chakra reservoir (ultimately boosting its size equivalent to the added amount) and the target's natural affinities bolster Yūmei's own (if that target was a master of Fire Release, it would enhance Yūmei's usage of the affinity, depending on the level of mastery the target had with it; it does not however teach him elements, or combinations exotic to him). Additional side effects, depending on the species of the target, may modify Yūmei's previous appearance, and depending on the target's alignment may impact Yūmei's personality to a certain degree.