Genuinely good quality, accurate description, not the slightest bit unfair!
As for the Holy Fist Realm, the existence of the Dark Ultimate Entity, both were restricted by certain conditions that prevented them from fully descending into the Real World. Even the fallen Moon God, which was formed into the Moon God statue from hunks of meat.
Facing Casio wouldn't end well for them.
As for Xiadu, well, he is someone who needs to be considered separately.
It is even questionable whether he is a person at all.
In summary, over thousands of years, regardless of the era, those who were only a step away from the Holy Fist Realm were powerful enough to push through the times undefeated!
In the woods, Casio raised his head. Through the gaps in the leaves, he saw the sky filled with an orange glow and clouds rolling like sea waves. In these heavily overlapping clouds, he sensed the coming storm: "Let the storm come even more fiercely..."
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