Primordial World, Western Lands.
Speaking of it, the Western Lands had once been no less magnificent than the Primordial Eastern Wilderness.
Back then, the Western Lands had dense spiritual qi, countless blessed lands, and many Dragon Veins.
Unfortunately, the Demon Sect had been located here. It established the Devil Race and spread the Devil Path System. Those who cultivated the Devil Path System produced devil qi. Devil qi possessed powerful corrosive and infectious properties.
Later, Luohou of the Devil Race, wishing to demonize all living beings, refined the Western Dragon Veins and transformed Dragon Veins that released spiritual qi into ones that released devil qi.
The Dragon Veins fell into demonhood, and devil qi surged mightily, gradually demonizing the entire Primordial World—
In the end, Luohou failed and was suppressed by Dao Ancestor Hongjun.
Yet Luohou had been ruthless enough to detonate the Western Lands, causing devil qi to billow and spread throughout the Primordial World.
Left with no other choice, Dao Ancestor Hongjun could only rely on seals to seal away all the devil qi within the Western Lands.
Afterward, he used all the spiritual qi born from the Western Lands to form seals that locked down the devil qi.
From then on, all spiritual qi produced by the Western Lands went toward maintaining the seals. This was why the Western Lands became barren, spiritual roots struggled to survive, and blessed lands found it difficult to flourish.
The only blessed land was Mount Sumeru.
But Mount Sumeru was precisely where the eye of the sealing formation lay.
Of course, the spiritual qi produced in the west could also be devoured. Unfortunately, once it was devoured, devil qi would spread. Thus, Dao Ancestor Hongjun had Jieyin and Zhunti become two of the Sages, tasking them with guarding the devil qi