After carefully calculating it, he had unknowingly walked for nearly a week in the underground river s, passing through countless difficult places along the way. Fortunately, the water level had not risen any further, and the deepest part was only at his waist.

For example, there was a type of small fish the size of a palm. It's body was flat and normally didn't look like much, but once it was frightened, it would immediately swell like a balloon.

However, now that he was in such a predicament, he didn't have the heart to carefully observe these strange little lifeforms. Moreover, in order to guard against the poison, he had to carefully avoid these strange little lifeforms the moment he sensed them.

However, Lin Jin still subconsciously calculated that the time had already passed. Like this, he kept walking forward, and when he reached the back, the flow of the underground river started to get narrower and narrower, and until now, the entire flow of the underground river's water was less than three meters on either side, and there was only a meter or two left. Compared to the broad and initially wide road, it was like a small alley.

He was now beginning to suspect that with this situation where he was gradually narrowing down, it was very likely that he would not be able to enter any further after a few more miles. At that time, the only way out of this predicament would be to find a dry place to cultivate and wait for the sacred art to recover.

However, after walking for such a long distance, he was still unwilling to give up. Holding onto his last bit of hope, Lin Jin wiped off his sweat and continued to walk.

As he expected, after a few hours, the water finally stopped flowing.

No one knew where it had seeped, but a small hole with a diameter of less than half a meter appeared in front of him. Clearly, the road had already ended, and there were two choices placed in front of him.

He used his spiritual force to explore the cave. Within ten meters, the road was bumpy and there were no living beings. He could not help but feel dejected as the underground river that he had been searching for turned out to be like this.

He subconsciously looked at the cave and was about to leave, but suddenly, he felt as if his eyes flashed when he had never seen the light before. This was true light, not spiritual power. It wasn't an illusion.

He was shocked and quickly moved his head over.

When he looked inside, he saw a faint light far away in the cave.

However, in the eyes of a person like him who had not seen the light for more than ten days, this faint light was even more eye-catching than the usual sun-like light.

Could it be an exit?

A person who had improved greatly in their mental state. But when he saw the light again in the dark underground, he could not help but feel ecstatic.

At this moment, this hole that was not even half a meter in diameter was no longer a problem for him. Using both hands and feet, he quickly dived into the hole.

The passage was moving in a straight line. Among them, there were many that stood out. Some could even be described as sharp rocks.

Lin Jin crawled along the passage, at this speed, his Spirit Force detection was no longer as useful as it was in normal situations. In a rush, he bumped into an unknown number of sharp rocks.

Fortunately, his body had already been protected by the zhenqi, so normal rocks could not do much about it. It was broken into pieces and scattered all over the ground.

However, when he was about ten meters away from the exit, the hole suddenly became small. He looked carefully and found a half meter wide rock was blocking his path.

Spreading his spiritual energy forward, a vast expanse of space appeared in his mind.

It was just a rock, how could it stop the desire to leave his heart? He moved the remaining zhenqi in his hands. He fiercely threw it at the rock.

BOOM!

With a loud bang, the rock broke into countless of pieces. They shot toward the other side of the cave.

By the time the dust settled, the hole was big enough for him to get through. Lin Jin shouted happily, and suddenly pounced out of the cave.

Lying at the end of the tunnel, he subconsciously let out a soft sigh when he saw the scenery outside the cave. He unconsciously froze.

What appeared in front of him was not the exit that he had imagined would lead to the outside world, but a gigantic underground cave. In the center of the cave, there was a lake that was emitting a bright blue light, the lake that stretched as far as the eye could see.

The light was coming from the lake. And that was what surprised and incredulous him.

Not far from him, there were two other somewhat larger holes. One of them was flowing with a clear stream of water and quietly poured into the lake in the center of the cave while the other seemed to have dried up long ago, leaving only a faint waterway.

Looking up, he saw that it was not the sky he had imagined, but a dusky thing. Although the light in the lake was very weak, Lin Jin could still tell that it was a hard rock.

The entire cave appeared to be in an irregular circular shape. At the edge of the cave, there was a land formed by ash-grey rocks, which was about fifty to a hundred meters away from the shore of the lake.

What surprised him even more was that on the rocky ground on both sides of the lake, there was actually a random gigantic tree. Each tree was as big as a pillar supporting the sky, and even the shortest was more than ten meters tall.

One had to know that the distance between the top of the cave and the ground was at least ten stories high.

Lin Jin wanted to differentiate what kind of tree it was, but he was quickly disappointed. These trees, each and every one of them were not things he could call out, and from their looks, had long since lost all signs of life, only leaving behind a trunk.

As he walked into the cave, he suddenly felt a warmth that was not present in the underground river Dao, making him feel much more comfortable.

He found out that this cave was actually not as big as he had imagined, but it was still about seven to eight square kilometers. The reason he could not see the edge of the cave at first glance was because the shock it gave him was too great, and even though the light from the lake could illuminate the entire space, it was difficult to see it clearly from a distance.

But even so, seeing such a beautiful scenery, Lin Jin was unable to recover from it for a long time.