Primordial Sacred Abyss, located in the depth of Sacred Abyss Continent, was an ancient battlefield between the Great Thousand World and the Fiend Clans.
There were many Heavenly Sovereigns that fell here, so even if they’re dead, there would still be remnant traces of their aura that broke the balance between the heavens and earth, causing people to feel pressured. The pressure in this place was too great and suffocating. Fighting here would exhaust more Spiritual Energy than anywhere else in the Great Thousand World, since they had to withstand the pressure that existed everywhere.
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For Mu Chen's exploration in the Primordial Sacred Abyss, please visit Primordial Sacred Abyss Exploration.