Beichen Continent, Qingyun Prefecture, this large area has been occupied by demon cultivators, and black-clothed demon cultivators can be seen patrolling in the air from time to time, for many monks in Beichen Continent, this area is already a forbidden area, once discovered by demon cultivators, they will definitely die.

The four of Lin Shan, dressed as ordinary ordinary people, lurked in the secular world during the day, and at night, they sped up their speed and rushed in the air, and they also met several groups of demon cultivators, but fortunately, the four of them were very vigilant, and they were all in danger, and they continued to go deep into the place controlled by demon cultivators.

Finally, five days later, Lin Shan's mind moved, and the sound of waves in front of him came, and the breath of water came to his face.

"Do you want to go to the sea?" he muttered to himself, and then a wide sea appeared in front of the four of them.

"This is our destination this time, Tongtian Lake!" The four of them had come to the sea, Mo Tian pointed to the water under his feet, breathed a sigh of relief, and whispered to the three people around him.

He was quite happy in his heart, there was no danger on the way, he passed through the land ruled by the demon cultivator, and arrived here safely, after entering the water, if he successfully found the cave and excavated successfully, it would be even better.

"Is this a lake?" Looking at the turbulent water in front of him, Lin Shan was secretly shocked in his heart.

Under their feet, there was blue water, vast and boundless, with no end in sight, and there was only a small wind on the surface of the lake, but the lake water was sometimes rolling up huge waves and roaring under their feet.

The islands are stable in the waves, like duckweed in the wind and waves, as if they may be submerged at any time.

Lin Shan looked at it again and saw that through the blue water, under the surface of the lake, every hundreds of zhang away, you could always see a huge whirlpool.

"Underwater undercurrent?" whirlpools vary in size, the diameter of the large one is more than ten zhang, and the small one is about five zhang, and its underwater suction power must be not small.

Even if the waves are strong and the underwater undercurrent is dense, you can still see a school of fish under the lake, some big fish, which are ten zhang long, float out of the lake, and the exhaled water column is accompanied by the tumbling waves, and the water vapor in the air is boiling.

The air was full of seabirds, and the ears were filled with bursts of birdsong, and some giant birds, with long pointed beaks, and under their wings, there was a large shadow.

They stared at the fish under the water in the air, and when they found an opportunity, they rushed down the water like arrows and picked up big fat fish in their mouths.

"The underground of Tongtian Lake leads directly to the sea, we have to be careful when we go into the water this time, we may meet Haixiu. Mo Tian continued, his face began to show solemnity.

"Mo Daoyou, do you mean that the cave is in the water!?" Yu Fu's face changed, even though he and Mo Tian had known each other for more than thirty years, Mo Tian had never told him the detailed information, and it was not revealed until here.

Lin Shan and Yang Li's faces also changed slightly, everyone has no experience in fighting in the sea, if they meet Hai Xiu underwater, they will inevitably fight, everyone in the sea, almost no experience in fighting, their strength will inevitably drop a lot, and they are a little shocked when they hear this.

"Yes, twenty years ago, when I only built the second layer of foundation cultivation, because my master was ill, I urgently needed a miraculous medicine in the sea to heal. There are many sea repairs in the sea, I don't dare to go, I inquired about this Tongtian Lake, although it is in the Beichen Continent, it is not far from the sea, its underwater undercurrent, straight to the sea, I just came to try my luck, I didn't expect the sea medicine was not found, but I found this mysterious cave, but unfortunately, Shizun finally because there is no miracle medicine, and finally sat down. Mo Tian showed a look of grief on his face, if his master was alive, this treasure hunt would have started a long time ago, and it would be the turn of now.

Summoning Lin Shan and the other three to come is a helpless move, he can't open up the cave alone, and now it is under the control of the demon cultivator, if it is detected by the demon cultivator, it will fall short.

In Zeze, it has been a long time to build the ninth layer of the foundation, if he can find something from the cave that is very helpful to the achievement of Jindan, the achievement of Jindan, just around the corner, the strength will soar greatly, because of this problem, this is why he came to explore at this time.

"What kind of medicine is the miraculous medicine in the sea?" Yang Li asked with a frown.

"Seven man seaweed. "Presumably finally arrived at the destination, Mo Tian didn't hide it, and answered as soon as he opened his mouth.

Hearing this name, Lin Shan's eyes were dazed, he didn't know anything about it, Yu Fu was also quiet, and it seemed that he didn't understand, the medicine in the sea was relatively rare, and the sea cultivation was prevalent, it was quite dangerous, so few people knew about it.

"Qiman Seagrass, according to legend, grows in a place where the water aura is extremely abundant, and it will take shape at least five hundred years or more, and it will take shape at least five hundred years, and it will be possible to treat the injuries of the Yuan Shen, could it be that the master and the Yuan Shen are ill?" Yang Li pondered for a moment, and then blurted out, and it could be seen that he had a deep insight into the elixir, even if it was the elixir in the sea, he knew a lot.

"Brother Yang Dao understands that the fruit is broad, and it is indeed an elixir for the treatment of the Yuan Shen! Master Zun many years ago, practicing the exercises, the Yuan Shen was damaged, so he ......" Mo Tian also admired it, this Qiman Seaweed, he inquired for a long time, and only then did he know the elixir in the sea.

He and Yang Li's acquaintance is also more than ten years old, knowing that this person's cultivation is also deep, especially the understanding of elixir, it is even richer, and there are a lot of elixirs in the sea, the last time he came, he found a lot of things in the shape of elixir in the seabed, but unfortunately he didn't dare to move.

Because the monk who told him about the Seven Mans Seaweed specially told him that many elixirs in the sea contain highly poisonous, and if you don't understand it, it's best to avoid it, otherwise, the light person will have to retreat for several years, and the heavy one will not be able to save his life.

It was precisely because he knew that Yang Li's knowledge was profound that he was brought along, and if he could also find a lot of elixirs in the sea, it would also be a gain.

"Okay, everyone get ready, it's time to go into the water, although this is not the sea, but after all, it is connected to the sea, and it is very likely to meet Haixiu, I hope you will be cautious. After Mo Tian's words fell, he went into the water first, and the water splashed on the water, and the person had sunk into the water.

Lin Shan's three people were not slow, their bodies sank down, and they went down into the water one after another.

As soon as he got out of the water, Lin Shan immediately opened the aura hood, and in the water, a bubble appeared, enveloping him, and the water couldn't get wet.

The other three, too, were surrounded by schools of fish, swimming around, and despite their huge size, they were all mortal and did not pose the slightest threat.

Mo Tian took the lead and sank to the bottom of the water first, and Lin Shan and the others followed.

The depth of Tongtian Lake, Lin Shan was secretly frightened, it had been a while in the water, the speed of the four people was not slow, he estimated that this had exceeded the distance of three hundred zhang, and there was still no sign of the end, and the surrounding lake was already pitch black.

Although it is in the sea, it does not have much impact on their vision, and the surrounding scenery is still clearly visible, and it feels like it is sinking from the top of a mountain in the lake, and not far from the line of sight, there is a sea valley, and the four of them are sinking along this deep dark sea valley.

The deeper the sinking, the more turbulent the undercurrent, there is a strong suction, want to pull people to the depths of the seabed, this force is huge, even if the foundation period of the forest mountain, still feel the bubbles of the body in the deformation, as if there is a sense of inadequacy.

"This pull must be caused by the undercurrent leading to the sea. Lin Shan secretly guessed that he had slightly increased the output of the spiritual qi, which stabilized the spiritual bubble and continued to follow behind Mo Tian.

After another half a pillar of incense or so, I finally vaguely saw the rugged seabed.

Through the bubbles of the amulet, a refreshing feeling hits, and the water at the bottom of the sea, as if you look down from the same air, appears pale blue.

"Water with abundant water aura?" Lin Shan muttered to himself, this refreshing feeling, he could feel it, it was precisely because of the amount of water aura, which penetrated from the water to the bubbles.

"Lin Dao friendly eyesight, the water depth of this Tongtian Lake is eight hundred zhang, rich in water aura, when I first came, I was very surprised, almost to stay here to practice, presumably that senior, should also take a fancy to the rich water aura here, this is the practice at the bottom of the sea. Although Lin Shan's voice was small, everyone's cultivation was not low, except for him, the other three people were all in the late stage of foundation building, even in the sea, through the spiritual bubbles, they could still hear it clearly, Mo Tian heard his self-talk, nodded and replied.

Finally, Lin Shan's feet stepped lightly on the bottom of the sea, his eyes swept around, and his face changed slightly.