Three Realms Mountain.
The earth was tinged with a blackish-red color, and demon qi faintly rose, sprouting various grim and pitch-black plants.
This was the work of the Demon Clan using divine skills to transform tens of millions of miles of land around it into a 'Demonic Qi Swamp.'
This 'Demonic Qi Swamp,' naturally rich in demon qi, made it extremely difficult for Immortal Cultivators who cultivated spiritual energy to move within it, and using magic was even more arduous.
Only Cultivators above the Returning to Emptiness stage would be slightly less affected.
This 'Demonic Qi Swamp,' together with the 'Demon Guarding City' behind the swamp, served as the Demon Clan's first line of defense against the human race.
The 'Carefree Sky Demon King' had once dispatched troops from here, harassing the borderlands of the human race.
