The underground tunnel was not very large. It was semicircular, roughly three meters in diameter, and the walls bore obvious signs of labor! It seemed this passage had been excavated by that ancient sect—or perhaps by Xu Shi!
But Chen Mo believed it was more likely that the ancient sect had dug it!
As for why Xu Shi had not dug it, there would have been no need for him to do so. Even if he had discovered that the sect's residence was underground, there was no reason to excavate such a grand subterranean passage. What would he have used it for?
There were no historical murals or anything of the sort on the walls, nor was there any lighting. It was pitch-black; the entire path was swallowed by darkness from beginning to end!
This passage was truly quite long! Worried about unexpected dangers or missing some discovery, Chen Mo did not move too quickly and remained cautious. Yet to his surprise, after walking for over half an hour, he still had not reached the end!
Although Chen Mo was not moving fast, he was still at least twice as fast as an ordinary person's five kilometers per hour! Judging by that, this passage was indeed long!
What was even stranger was that despite the length of the passage, he did not feel any lack of oxygen. He only felt somewhat hot! As Chen Mo ventured deeper, the heat gradually intensified around him!
Chen Mo even noticed the movement of the air, as slightly warm currents brushed past him!
Chen Mo's Spiritual Sense constantly swept outward. Apart from the passage itself, the surroundings were all thick rock!
After he continued for a while longer, he felt the temperature rising rather quickly! At this point, if an ordinary person came here,