Nearly half a day later.
The ground near the Ginkgo Divine Tree rumbled and shook. A dense yellow radiance appeared on the white stone pillars, and they sank into the ground one after another. A yellow barrier ten times thicker slowly rose from beneath the earth, enclosing the Ginkgo Divine Tree.
The barrier formed a hemisphere more than a dozen zhang thick, towering into the heavens and extending left and right beyond the limits of sight. Its edges were nowhere to be seen, and it looked utterly impregnable.
"So this is the Heaven-Earth Profound Restriction Grand Formation? Even a cultivator at the late True Immortal stage like our master couldn't hope to break through a formation like this!" Lianshan marveled as he looked at the enormous magic formation.
"Though this formation is profound, all three of us must work together to keep it running. None of us can leave even for a moment. Protecting our master's palace is equally important, so we can't spare anyone from there. We'll all have to work hard for quite some time," the Ba Serpent said.
"Understood," Lianshan and Guizang replied.
The three demons sat in midair and activated the magic formation.
Time slipped by, and a day and a night passed in the blink of an eye.
Inside the Low Mountain Grotto, Shen Luo opened his eyes. The green light around him slowly faded, and his tense expression relaxed.
After cultivating for a day and a night, he had expelled as much of the demonic qi from his innate vital energy as he could. Though a considerable amount remained, it was no longer corroding the rest of his vital energy.
Yet as more and more of his innate vital energy was corrupted by demonic power, he could clearly feel his mind growing increasingly restless.