"They probably sealed the entire region after that ancient emperor died. No one entered for countless years. Eventually the curse weakened enough that the dangerous effects disappeared." Lin Mu spoke.
His gaze drifted toward the warning sign standing far away. "Once they confirmed it had become safe, they likely removed most of the barriers while still keeping it classified as a forbidden zone."
Xukong agreed. "That is the most reasonable explanation. Even if the surface became harmless, no one could guarantee what remained underground. Very few cultivators possess the means to descend seven kilometers beneath solid rock."
Lin Mu smiled faintly. "Especially without disturbing everything above."
Phase truly had proven invaluable once again. Without it, excavating such a depth would have required tremendous effort while drawing attention from half the sect.
He looked once more toward the area from which he had extracted every crystal. "So they never even knew these existed."
