In the next downstream, Lin Wu found that the sea beasts along the way no longer attacked him, but chose to avoid him from a distance.

But if you think about it, you will understand that you have slaughtered their big guys, and if they go up again, isn't it suicide?

Even if they are not enlightened, the survival instincts of the beasts let them know that they should hide from invincible enemies.

This made it easier for Lin Wu to find the entrance cave that Wan Zong said.

Reaching the bottom of the lake, Lin Wu could already feel the huge water pressure outside, but this was still within his tolerance.

As a cultivator, as long as he wanted to, he could go without breathing for a few hours, and a small amount of air in his body was enough to maintain normal physiological functions for a long time.

The bottom of the lake was covered with strange rocks, mud, sand, and underwater plants, so although Wanzong had already indicated the general location to him, it was not easy to find a small cave.

Coupled with the fact that Lin Wu's speed at the bottom of the lake was limited, the time to search was even greater.

Two hours passed, Lin Wu found nothing, some other holes, he found a lot, but after he swam in to investigate, he found that it was just an ordinary hole a few meters to tens of meters deep.

Just as Lin Wu was about to go up to take a breath and rest for a while, another hole appeared in front of him, which was the same as the small hole he had found before, and he couldn't see anything special.

Lin Wu thought about it and decided to go up after exploring this hole.

The entrance to the cave is not big, and after being covered by stones and sand, it is only half a meter wide in diameter, just enough for a person to enter, and a slightly burly man is a little reluctant.

Lin Wu's body is the kind that is thin, and it is not difficult to enter this kind of cave.

As soon as he jumped, Lin Wu jumped in, and the cave was extremely dark, and even if he opened the blood wheel eye, he couldn't see the situation in the cave clearly.

In case of danger, Lin Wu spread his perception to the maximum, and it would have been much more convenient if there was Noah, but unfortunately Noah, the robot, could not go down to such a deep depth, so it had to be put into the inventory by Lin Wu.

A few minutes later, Lin Wu had already probed hundreds of meters, but he still hadn't bottomed out.

"It's so deep, could it really be that entrance?" Lin Wu thought to himself as he continued downstream.

After a few more minutes, Lin Wu frowned, the air in his body was already a little insufficient, but there was still no sign of the end ahead.

"Sister, I shouldn't suffocate to death. Lin Wu was a little panicked, in this small place, it was difficult to turn around, not to mention that he had already swam in for a distance of thousands of meters, and it was too late to go out and return to the lake.

"This time I was careless. "Lin Wu didn't expect this hole to be so deep.

Just as he felt tightness in his chest and lack air intake, a huge suction force suddenly came from ahead.

Lin Wu only felt that the water around him was rushing forward frantically.

Now, he doesn't have to swim on his own at all, and this suction force makes him move forward countless times faster.

He couldn't calculate how far he had traveled, and along the way, he could only protect himself from crashing into the stone wall next to him.

The suction carried him through the torrent for several minutes, and finally a little light appeared in front of him, and then the light continued to magnify.

With a swish, Lin Wu's figure jumped out of the hole and into another lake, and the suction had disappeared at this moment.

Lin Wu didn't care about anything else at the moment, just thinking about hurrying to swim towards the light above his head.

Poof

Lin Wu's head sprang out, and he took a big breath of the air around him, and after a few breaths, he had the energy to check the situation around him.

This is a cave, and there are many lighting stones inlaid on the surrounding stone walls, Lin Wu thought that Wan Zong had placed them here to illuminate this place.

Lin Wu also found that what he was in at this time was not a river or a lake, but just a small pool.

"Huh?" Lin Wu was stunned for a moment, he sensed that there was something unusual here.

He raised his eyebrows and said secretly: "No wonder Wanzong said that this is the best retreat cultivation ground, and the energy in the air is so dense that it is really rare. ”

Lin Wu looked around as he swam to the edge of the pool.

Jumping lightly, he jumped onto the ground, a trace of cold air rose up and down his body, and then his whole body shook, and countless ice chips fell to the ground, Lin Wu felt much more refreshed, and he was no longer the appearance of the soup chicken just now.

This area, connected to the surrounding stone walls, seems to hollow out this open space from the middle, and there is nothing bare except a few lighting stones.

"Where is this cave, the only entrance is from under the pool. Lin Wu was very surprised by this, Wan Zong hadn't explained anything to him before, and had been selling Guanzi.

Raising his head, Lin Wu was stunned, and he saw that there was a hole in the stone wall above his head.

"Is it the entrance of the cave again?, or is it on the top of the head?" Lin Wu felt that the entrance of the cave here was not right from the beginning.

Under the lake and above the head, there is no one who can easily enter, and martial artists or ordinary people with limited strength, even if they know this place, they will not be able to get here at all.

Even a Liquid Refining Realm master like Lin Wu would inevitably have to take some effort to enter.

It's such an uneasy way to enter.

Lin Wu looked left and right, and found that only the hole on the top of his head was the most conspicuous, and there was no other place with the same hole.

Obviously, if you want to continue exploring, you can only go into that hole.

Of course, he could just stay here and use it as a retreat.

Where to retreat was not a big problem for Lin Wu, as long as no one bothered him.

However, he still chose to go up and have a look, for no other reason, purely because he needed to satisfy his curiosity.

He released Noah casually.

"So, the master has found the entrance to the retreat, is this the retreat? Noah suddenly appeared out of mid-air.

Then he fell to the ground and wiped the small steel helmet on his head, while twisting his neck to check his surroundings.

"Yes, I found the hole under the lake, but this isn't the final venue. Lin Wu put his fingers on the top of his head.

Noah also raised his head, and accidentally put the steel helmet he had just put on fell to the ground, he hurriedly picked it up, and wiped it carefully until it was confirmed that it could reflect the light, and then put it on his head satisfactorily.

"Master, the radar shows that there is no sign of life in the hole above the head, and there is no end of exploration. Noah said, its radar turned on again.

"I know, you change back to Nokia, I'll take you away, and let me know if there's anything going on. Lin Wu said.

Noah jumped lightly, jumped onto Lin Wu's palm, and changed for a while, returning to Nokia's ontology mode.