They have never seen a human before, and they don't feel the power of other creatures.

In order not to be attacked by most creatures, Lu Tian did not restrain his breath. At this moment, most of the adult birds chirped impatiently, but they didn't dare to step forward, obviously feeling the breath on Lu Tian's body.

Several young birds looked at Lu Tian innocently, heard the voice of their parents, and lazily responded a few times.

The immature cry sounded occasionally, and the hole dug by Lu Tian became deeper and deeper

It's really a newborn calf that is not afraid of tigers, silly and cute.

Lu Tian didn't hurt them either, Zhen Yuan turned into a palm and grabbed the dirt outward one by one.

There was no Lu Tian's figure on the ground, and a few young birds were bored, so they flew to other places close to the ground to find something to have fun.

Lu Tian controlled the entrance of the cave to be two meters wide, and the further down he went, the diameter began to shrink.

In addition to living things, the Amazon rainforest also has as much water.

When Lu Tian dug five or six meters, he was completely submerged.

By the time I dug ten meters, the hole was only one meter wide, but the dirt still started to fall because of the water flowing out, bringing the dirt down.

"You can't dig like this!"

The soil is too soft, and there is a lot of groundwater flowing out, if it weren't for the protection of Zhenyuan, Lu Tian would have become a mud man long ago. When he reached more than ten meters, he found that he could not throw too much dirt out.

Even if he was wrapped in the True Yuan, he could throw the soil out, but the resistance of the water at a depth of more than ten meters was too great, and the consumption would naturally increase.

Now, every meter he digs deeper, he consumes a full drop of True Yuan, and as he goes down, the consumption increases.

You can't breathe here, you rely entirely on cultivation, and you have to save the true yuan.

Even if you dig more than 100 meters by yourself, it is estimated that you will have to dig a lot of distance horizontally.

"It can't go on like this, we have to change the way!"

Lu Tian was worried that he would run out of True Yuan by then and would be trapped below.

Then he took the ground level as the level and dug down at an oblique ten degrees.

Half an hour, an hour, two hours, and all that remains in the ground is a hole filled with water, like a well.

Lu Tian was a little embarrassed, when he dug a few meters diagonally, the space he began to dig completely collapsed due to the relationship between gravity and water flow, burying him underneath.

Now it has been dug diagonally for more than 100 meters, plus the previous one, and it has probably gone down about 30 meters vertically.

However, this method saves a lot of effort, just use the true element to support an elliptical spherical space, throw the excavated soil back, and there is room to continue, and it will not be completely blocked by the soil.

There was no light here, there was no air, his body was completely covered in muddy water, and Lu Tian could only maintain a state of fetal breathing in the True Yuan Cover.

"Well, what is this?"

"Rock formations!"

Lu Tian felt that he didn't have the feeling of cutting tofu in his hands, and it turned out that he had touched a rock formation.

Because of the pressure, the rocks tens of meters deep are much harder than the ground, which increases the consumption of land and sky.

In order to save the true yuan, Lu Tian can only do it himself, instead of only digging with the real yuan.

But the speed still slowed down, and it took more than three hours to dig to a depth of 100 meters.

Lu Tian released his spiritual power, and a feeling of blocking came, which could be detected more than twenty meters away.

"There is no Dark River."

Another burst of digging.

"Still nothing!" Lu Tian touched the sweat on his forehead, in order to speed up, Lu Tian had already used both hands and feet and began to consume physical strength. The body kept emitting a burst of heat.

Lu Tian's attention was on the target, and he didn't notice that a thing in his arms was also heating up at the moment, emitting a purple faint light.

"It's here!"

Every few meters, Lu Tian looked at it until the dark river appeared.

In the hard rock formation, a rock on a dark river suddenly broke open, and a figure fell down with the rubble.

With a "bang", Lu Tian stopped his body in the water and swam in one direction against the current.

He was going to look against the current first, and if he didn't, it would be easier to come back with some effort.

In the water, the range of spiritual power increases far and can reach several kilometers.

However, in order to save mental power, it is still maintained at 100 meters, so that there is room for mental power to recover.

There were so many branches in the Dark River that it took me more than two hours to find them.

The underground pressure of more than 100 meters is far greater than that of more than 100 meters, and Lu Tian has to open full firepower, which is already less than half.

He didn't step forward, and stopped a hundred meters away from the colorful glass.

Worried about an accident, Lu Tian was ready to fully recover his strength.

Impulsiveness is the devil and is not in a hurry at this time.

Use the True Yuan Blade to cut off a piece of the rock wall and inset your body in it so that it will not be swept away by the current.

And so began to recover.

The underground silence was terrifying, and the vitality was thin and pitiful, and it took Lu Tian three days and three nights to barely restore the true yuan completely.

If the vitality is not enough, the blessing of the life fire is completely useless, and it can only be recovered slowly.

If it is outside, it will take two or three hours at most, and even if the true yuan is exhausted, it will be recovered in half a day.

The speed speed is almost ten times worse!

Even so, the concentration of the vitality here is about three points, which is much better than before the heaven and earth have not changed.

From the end of the Qing Dynasty to the beginning of the 21st century, for nearly two hundred years, the vitality of heaven and earth was depleted, coupled with industrial pollution, and cultivation became more and more difficult.

At this time, the vitality is the thinnest, which is counted as 1 time, which is a little vitality concentration.

Those who practice martial arts rely more on the vitality of heaven and earth.

So in this environment, the most influential is the ancient martial arts world in China, which has been suppressed by Europe and the United States and other countries for more than 100 years.

There was even a period of time, there were only one or two masters of the congenital fetal breath realm, and in the international community, the ancient Chinese martial arts world had almost no right to speak.

If it weren't for the emergence of a new secret realm in Kunlun a few decades ago, the treasures in it allowed some people to break through, it is estimated that it would still be a very humiliating situation.

It is also thanks to the threat of European and American supernatural beings that the ancient martial arts world of China has been huddled together, reducing internal friction, and with the addition of several breakthrough Zhengang realms and dozens of fetal breath realms, they have been able to gain a foothold and gain some of the right to speak.

At the same time, he vigorously cultivated new people, and many genius martial artists appeared, Lu Tian grew up in such an environment, and also took charge of a large ancient martial artist organization.

Lu Tian sighed with emotion, if the concentration of Huaxia Yuan Qi more than a hundred years ago was here, the ancient martial arts world would not have been bullied so badly.

Lu Tian touched the flowing water, remembered the feeling of coming down all the way, and also experienced the effect of the earth blocking the vitality.

The concentration of the outside world at the moment is 35~36 points, and the concentration of vitality within ten meters is about the same as that outside.

After this point, the concentration will drop by two points every ten meters deeper, and at more than 100 meters, the concentration of vitality will only be 3 points.

Of course, this is only the current situation, as the concentration of the vitality continues to increase, and as time goes by, the vitality will invade even deeper.

With enough time, the entire earth can be washed by the Metaverse.

Lu Tian stopped thinking about these things, stood up from his meditative state, and walked slowly towards the goal.

There are many branches of the dark river, and the one Lu Tian walks on is generally quite spacious, with some places being more than five meters high and wide, and the narrow place is enough to accommodate Lu Tian to pass.

Lu Tian walked slower and slower, the true yuan flowed all over his body, and he looked at it with his spiritual power, and there was nothing abnormal.

But he was still very nervous, because there were many things that could evade his mental detection, and according to experience, the more precious the things, the more dangerous they were.

There may be powerful creatures guarding him, or there may be strange formations, which are enough to threaten Lu Tian's life.

90 meters, 80 meters...... Fifty meters, no anomalies.

After turning a small corner, Lu Tian continued to move forward, and he could already see the colorful light emitted by that thing, which was extremely beautiful.

It can also be dangerous.

The sound of "whoo~" frightened Lu Tian's heart violently, and the True Yuan Cover immediately became extremely thick.

"It turned out to be a stream of water!" Lu didn't notice anything abnormal after a second, and after a careful sense, it turned out to be the sound of water in the dark river suddenly hitting the rock wall.

"I thought it was some kind of creature, a false alarm."

Although it is unlikely that there are powerful creatures here, they are afraid of what if.

Lu Tian gathered his mind and set off again.

But he probably never thought that he would encounter this kind of thing later.