Abominations.
For the most part, Abominations are a result of what happens when a kaijin survives the death of their lord and start to unbound themselves to the rules of reality.
Their forms become even more monstrous and unruly, their minds degrade to the point of repetitive insanity and their desires become less of a "core" and more of a..."existence".
[Chaos] cannot exist within [Order].
However, there are other ways for an abomiantion to be born.
Our intrepid hero doesn't know this yet, but kaijin can bleed and get injured like any other living being in the universe, but...
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Once upon a time, in a kingdom that had yet to fall into the sands of history, whose name was once respected across the lands, was a mighty warrior clan.
This clan was home to many powerful figures, but the most notable members was the clan leader and his three sons.