Underground, the giant drill bit is constantly moving, quickly heading towards the depths of the earth's core.

Bai Chen followed closely, protecting himself with a Yuan Qi shield, dividing the Blue Soul Crystal fragments that kept pouring up to both sides.

The day passes......

Two days passed......

The huge vitality reserves of heaven and earth in his body, and the vitality absorption speed of middle-level souls, were enough for Bai Chen to maintain this kind of movement with extremely small vitality consumption like a perpetual motion machine.

As early as a hundred meters underground, there was no oxygen around, but fortunately, for cultivators, oxygen was not a necessity to sustain life.

That's it, another two days have passed, Bai Chen has calculated, if nothing else, it should be almost to the center of the earth.

His speed sped up a few more points.

An hour later, finally, the Yuan Qi drill bit pierced through the Blue Soul Crystal Layer, and in front of it was a space that was not too large, and with the light emitted by the Yuan Qi Shield, the space in the center of the earth was completely illuminated.

"Sarcophagus!" Bai Chen saw the familiar sarcophagus for the first time, and his face was happy.

His guess was not wrong, the sarcophagus was really in the center of the earth from Yuanxing!

After seeing the sarcophagus, Bai Chen was not in a hurry, out of caution, he did not immediately step forward, but released the field and covered the sarcophagus.

He wanted to find out.

It's a pity that the material of the sarcophagus seems to be very special, and even the realm can't look through the sarcophagus to find out what's inside.

"Interesting......" Bai Chen's eyes showed a thoughtful look.

You must know that the realm is the projection of the heaven and earth in the real world in the body, although it can interact with the real world, but strictly speaking, it is not in the same dimension as the real world.

And this sarcophagus can resist the investigation of different dimensions, which is really mysterious and abnormal!

Immediately, the coverage of the domain was no longer limited to the sarcophagus, but the entire inner space of the earth was explored.

Empty.

There is nothing else in the inner space except this sarcophagus.

Next, he first spread the domain to every corner of the earth's core space, and at the same time summoned layer after layer of thick Yuan Qi shields, enveloping himself in them, and then controlled his body and slowly moved towards the sarcophagus.

This is the lesson of Yu Zal, in the face of any unknown, to be cautious, even if it is useless, it is better than losing your life!

Well, it was really useless, there was nothing unusual along the way, and soon, he came to the sarcophagus.

The black sarcophagus looks very solemn, with some intricate patterns printed on it, which adds a little mysterious charm to the sarcophagus.

Looking at the mysterious sarcophagus in front of him, Bai Chen hesitated, but still took a few steps back, and used his vitality to push open a corner of the coffin lid.

The mutation was abrupt, and a familiar, countless times thicker violent aura than before, instantly filled the entire central space!

If it weren't for Bai Chen's preparation, the moment the violent aura appeared, he completely shrank the realm in front of him, isolating most of the breath, but I am afraid that he would have been delirious and fell into a state of madness by now!

Even so, he couldn't stay awake very well, under the erosion of the violent aura, his eyes gradually turned red, and the murderous intent in his heart couldn't help but surge.

He only felt that he had endless unwillingness and endless remorse at the moment, and he wanted to destroy the world and destroy the earth!

Slowly, the clarity in his eyes completely disappeared, and he completely fell into a state of madness.

"Kill, kill, kill!"

The vitality rioted, the realm churned, and the heaven and earth in the body continued to shake, and even disintegrate!

It is foreseeable that it will not be long before the heaven and earth in his body completely disintegrate, and it will be when he dies!

Fortunately, in the heaven and earth in the body, the mysterious stone tablet seemed to sense something, suddenly trembled, released a strong brilliance, and directly crossed the limit of the dimension, and appeared in the real world in the next second, with a "bang", it was above the sarcophagus.

Suddenly, the violent aura that had been endless just now instantly disappeared into invisibility.

After the violent aura disappeared, Bai Chen immediately regained his senses, sweating profusely, slumped on the ground, watching the changes in front of him, dumbfounded and overwhelmed.

He saw that after the mysterious stele appeared, in the sarcophagus, a little spiritual light rose up, and in a cheerful attitude, it quickly went towards the mysterious stele, blended into it, and disappeared.

And after absorbing that little bit of spiritual light, the mysterious stone tablet no longer stayed, seeing the space and dimension as nothing, and in the next second, it actually appeared in Bai Chen's body again!

With its appearance, the inner heaven and earth, which was originally on the verge of disintegration, instantly stabilized.

The inner space fell into dead silence again, as if nothing had happened.

"What...... What the hell?!" Bai Chen looked confused, and he didn't come back to his senses for a long time.

There were countless doubts in his mind, but he couldn't get any answers, and he waited in place for a long time, not waiting for the new memory fragment he was expecting to appear.

After about ten minutes, he slowly got up and walked towards the sarcophagus.

Although I don't know what happened just now, one thing is certain, the danger in the sarcophagus should have been solved by the mysterious stone tablet.

So, if you push the lid of the coffin open now, it should be fine, right?

Thinking so, he re-condensed a vitality palm and pushed the lid of the coffin open.

Sure enough, there was nothing unusual this time, and the lid of the coffin was easily pushed open.

Different from the imaginary blank of dry bones, what made Bai Chen's scalp a little numb was that there was a human man with a strange appearance lying in the coffin, he couldn't tell his age, he just lay there quietly, as if he was asleep, not at all like a person who had been dead for endless years!

This is definitely a terrifying existence that is unimaginable in cultivation!

But that's not the point, the point is that above him, that is, in the sarcophagus, the space is like a stream of water, rippling slightly, round and round, echoing in the sarcophagus!

"It's ...... Small world?!" Bai Chen's eyes instantly burst into a blazing light.

"It's a small world with a fixed entrance all the time!"

From the countless memory fragments that came from the mysterious stone tablet, Bai Chen knew that the inner heaven and earth were extremely important in terms of cultivation, and with the continuous improvement of cultivation, the inner body and earth of the cultivator would become larger and larger, and after reaching a certain level, it would turn from energy to materialization, forming a small world that really existed.

It can be said that the small world is everything for cultivators.

At this moment, seeing the small open world in front of him, Bai Chen was in awe of the existence in the sarcophagus, which was basically equivalent to deliberately leaving a legacy!

In fact, the small world is every cultivator's biggest secret and hole card, relatives, wealth, etc., can be placed in their own small world, as long as the cultivator does not die, it is absolutely safe.

Therefore, after most cultivators fall, they will not choose to open up the small world, but will choose to actively destroy it, or let it go and sink into the endless space dimension.

Some people with sinister minds will even leave a back hand in the small world, when the small world is accidentally discovered by the world one day, as soon as you enter, you will be hit by thunder!

Only a very small number of cultivators will choose to leave behind all their wealth and inheritance, open the entrance to the small world, and let future generations enter and seek opportunities.