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On behalf of the gods many mistakes and the sheer power humanity has reached, one was made to be stronger than anyone else, Striking fear in even his own kind. The antediluvian, the Calamitous, whatever you say. It all leads up to this one creature that got banned into the Realm of seals and chains. Only one can free him and that is the ancient demon. A rumor to be told and the power of all living beings combined.