Looking at the strange light patterns that were overwhelming in front of him, Chen Xi was not surprised.

Through his divine sense, he was already keenly aware of the new changes in the diamond-shaped crystal in his hand.

The purple qi in the middle of the crystal was originally a whirlpool, but when Chen Xi's soul floated to the edge of the main hall, the whirlpool in it immediately turned into the shape of a lotus flower, and the shape looked somewhat similar to the current appearance of the main hall.

Seeing this, Chen Xi immediately returned his soul to his senses and put an end to this dangerous behavior.

After the soul returned, Chen Xi was still sitting cross-legged on the ground.

After silently adjusting for a while, he finally opened his eyes.

forcibly letting the soul out of the body is still too reluctant for the current Chen Xi.

Therefore, after only a few minutes, his face turned very pale, and he looked like a patient who had just recovered from a serious illness.

However, although his face was ugly, Chen Xi's face couldn't help but show a hint of a smile.

Because he discovered a secret, and that is ......

This seemingly ordinary crystal is actually a legendary soul crystal!

The so-called soul crystal is actually a strange crystal that can hold the soul of the gods, and this kind of crystal is also very rare in the Tianxuan realm.

Soul crystals are precious, on the one hand, because they are extremely scarce, and on the other hand, because soul crystals are necessary materials for refining divine soul attack magic weapons.

In addition to refining magic weapons, soul crystals, as a kind of heaven and earth spirit treasure, have the effect of warming and nourishing the soul.

With the environment of the earth, it is obviously impossible to conceive a miracle medicine that can heal the wounds of the divine soul.

Therefore, this soul crystal is definitely a lifesaver for Chen Xi, whose soul is damaged!

No wonder this hall was able to imprison the soul of the green dragon, obviously because of this soul crystal.

Thinking of this, Chen Xi also probably understood the mechanism of the operation of the main hall.

Using the soul crystal as the eye of the array, he imprisoned the green dragon who only had his soul body left.

And He Tiangang and his party were trapped for more than a month without triggering any mechanism, and the fundamental reason was ......

They weren't immortal cultivators, so they didn't have a pure enough True Yuan to touch the mechanism.

Therefore, this formation and the main hall were obviously laid down by immortal cultivators!

Moreover, this unknown 'Immortal Cultivator' realm is at least above the Void, otherwise it would be impossible to arrange such a large array involving the true meaning of the word 'Void'.

With the soul crystal as the eye of the array, if it weren't for his appearance, which touched the mechanism of the main hall, the green dragon who lost his body would obviously never have escaped from the seal.

'There are also immortal cultivators on the earth?'

Thinking of this, Chen Xi immediately frowned.

It is said that Kanglong has no regrets, but he now has some regrets.

He should have spared Qinglong a small life to interrogate......

But that's it, and regretting it now doesn't help.

So, Chen Xi had to put this problem aside for the time being, and then closed his eyes and concentrated his breath, trying to let his soul enter the soul crystal.

The soul fire flew out from Chen Xi's eyebrows again, and then flew directly into the diamond-shaped crystal in his hand.

After Chen Xi's soul flew into the soul crystal, a feeling as warm as the March sun immediately enveloped his soul.

It was a very wonderful experience, which made Chen Xi feel very comfortable.

His injured divine soul could only sense things within a radius of ten meters, but after his divine soul entered the soul crystal, the sensing range of Chen Xi's divine sense suddenly expanded, covering the entire mountain in an instant.

In an instant, with the crystal as the center of the circle, any bit of wind and grass was under Chen Xi's grasp.

This feeling......

He hadn't experienced it for a long time.

Nourishing the divine soul is an additional effect of the soul crystal, and naturally it is not as fast as the divine medicine, which requires a long process.

Therefore, at this time, Chen Xi couldn't help but think of the main hall.

And at the moment when his mind moved, the hall suddenly made a 'boom' sound.

Then, the sixteen walls began to slowly lift upwards and gradually close!

The main hall has changed back to its former appearance.

As the soul crystal of the array eye, it can still control this hall!

Seeing this, Chen Xi couldn't help but feel happy in his heart, and immediately counted silently in his heart.

He had to calculate by counting how much time in the hall was different from the outside world.

Chen Xi was enjoying the nourishment of the soul crystal while counting carefully.

When he counted to 10,000, Chen Xi's mind moved again, and the hall suddenly bloomed like a remote-controlled toy, slowly blooming with the sound of 'boom'.

One number per second, with unmistakable precision.

That is, he spent almost 166 minutes in the main hall.

Before the main hall could be fully opened, Chen Xi flew out of the main hall excitedly and rushed directly in the direction where the temporary laboratory was located.

When I brought everyone back to the lab, it was about half past one in the morning.

He counted 10,000 seconds, 166 minutes, or 2.7 hours, in the main hall.

Based on the speed of time that He Tiangang said, if the main hall had not failed, then the outside world should have only passed about two minutes......

The more Chen Xi thought about it, the more excited he became, and he suddenly swept back to the oasis from the top of the mountain.

There was a quartz clock in the makeshift lab, and the answer he wanted was there.

The wind and snow were still in the sky, and thick dark clouds obscured the moonlight, so that it was pitch black all around.

After nervously opening the windproof door of the laboratory, Chen Xi saw He Tiangang and his party who were still unconscious.

In the dimly lit laboratory, only one energy-saving lamp is still on.

Next to the energy-saving lamp is the quartz clock brought by Professor Ho.

Chen Xi came to the table, looked down at the time on the table, and was stunned for a moment.

The time on the quartz clock pointed to -

1:55 a.m.!

And when he left, the time should have been around 1:34 in the morning.

Throw away some errors, which is about twenty minutes.

But he stayed in the hall for 10,000 seconds.

In other words, the ratio of time flow between the main hall and the outside world should be about eight times, and it is not as exaggerated as 1:100.

However, even if the time difference is only eight times, it is completely enough for Chen Xi.

One day outside, eight days in the main hall.

What is the concept?

Chen Xi pondered for a moment, but faintly felt that something was wrong.

According to what He Tiangang said, their group was trapped in the main hall for more than a month, how could it be that when he calculated now, there was only eight times the time difference between the main hall and the outside world?

The main hall is a month, and the outside world should have passed at least four days.

Chen Xi thought about it for a long time and didn't figure it out, and finally had to put this question in the back of his mind, planning to wait until He Tiangang woke up to confirm.

In a word......

Even though it's a hundred times, this time he really picked up a treasure!

After determining the role of the main hall and the soul crystal, Chen Xi immediately placed a ban in the temporary laboratory, and as soon as someone woke up, he would know as soon as he woke up.

Afterwards, Chen Xi plunged into the main hall and began to use soul crystals to repair his soul injuries.

Because of his out-of-body experience, he couldn't cultivate.

So, bored, he couldn't help but think about it.

Starting tomorrow, when Nian Nian falls asleep, he can secretly bring Ying Ying here.

When the time comes, the husband and wife will practice together, by the way......

It's really wonderful, it's wonderful~8)