Longevity starts with learning

About a quarter of an hour later, the compass hanging in front of Chu Mu, which was flashing with a faint white fluorescence, slowly returned to silence as the compass needle stopped turning.

Chu Mu seemed to have noticed something, and took out a jade slip. After recording all the information he had observed, he looked at a bottomless gully not far away.

In the past, he might still be a little unfamiliar with this kind of space that is self-contained, but since he refined the spirit beast bag and realized the mystery of the heaven and earth, he obviously has a very clear understanding of this kind of space that is self-contained.

Just like the ruins in front of him, and even the famous secret realm in the world of cultivation, and the so-called small world.

In fact, there is no essential difference between them and the Qiankun bag he refined. They are all small worlds that exist dependent on this big world of cultivation.

The only difference between the two is the quality and quantity of space.

Just like the East Lake Secret Realm back then, it can be completely regarded as a super-large Qiankun Bag. Its essence is still the same as the Qiankun Bag. It depends on this world of cultivation, not a truly self-contained world.

And the essence of this relic cave is naturally the same.

It is the product of the great power of ancient cultivators. It depends on the world of cultivation, forms its own space, and achieves true isolation from the world.

As far as he knows, this kind of cave with its own space and isolation from the world was also quite popular in ancient times.

In many ancient books, it even has the beautiful name of "immortal mansion".

The relics and inheritances that have left countless legends in the world of cultivation often refer to this kind of immortal mansion.

Of course, the most important thing is that it is often only this kind of isolated immortal mansion that can be passed down over a long period of time.

If it is an ordinary cave, even if the formation ban can last for a very long time, the formation ban is visible outside and the traces are obvious. Unless it is a deserted place, otherwise, under the evolution of time, it must have become an opportunity for cultivators long ago and it is impossible to pass it down for too long.

And since this kind of immortal residence and secret realm with its own space relies on this immortal world, there must be a connection with detectable traces.

And this connection often has distinct characteristics.

For example, the connection between the East Lake Secret Realm and the immortal world lies in the jade slip from the secret realm. In other words, it is the token that opens the secret realm and enters and exits the secret realm.

For example, his Qiankun bag needs to be guided by his soul breath to open the Qiankun bag and store living and dead things.

The connection can actually be regarded as a door, a door that must exist as long as it relies on the immortal world.

However, this kind of door is often restricted by the controller.

It is a very common truth, just like locking the door.

This kind of space has the most obvious connection and the most obvious traces with the world of immortal cultivation.

Even if this relic heritage is hidden, it will appear once every sixty years, and its portal must be like this.

The only difference is whether he can detect this portal and whether he can open it.

Chu Mu stared at the compass, and the needle was fixed in the south direction, which was exactly the direction of the bottomless ravine he was looking at.

According to the situation detected by this compass, there is a space fluctuation in the ravine.

However, this space fluctuation is extremely obscure and extremely unstable.

It's as if the position of the portal is changing all the time and has not been fixed.

"Is it a formation covering it, or a change in space?"

Chu Mu thought a little. If it is the former, then there must be a trace to follow, and perhaps he doesn't need to wait for a decade, he can find a way to break the formation and open the portal.

If it is the latter, it is undoubtedly beyond his ability.

With the help of this compass, he could monitor space and even disrupt and solidify space.

But this kind of use of space was obviously superficial, more like knowing the result but not the reason.

After all, even a Yuanying Great Power could only get started with the space.

He was able to refine this space-type compass magic weapon, more because of taking advantage of the mystery of the formation to produce the effect at the spatial level.

His own understanding of space was limited to some cognition of the self-contained world when refining the Qiankun bag. Apart from that, his cognition was extremely limited.

Chu Mu took a step forward, and in a flash, he stepped out of the sky-breaking flying boat and walked on the seabed. In just a few breaths, he was suspended above the deep sea ravine.

Although he had reached the seabed in the traditional sense, this ravine was still bottomless.

Chu Mu thought for a while, and as his mana flowed, his figure suspended on it slowly descended into the depths of the ravine.

The gully was not wide, only a few feet wide, but in addition to being bottomless, its length stretched from his field of vision to the endless darkness of the seabed, with no end in sight.

The rocks on both sides of the gully were exposed, and unknown corals and shells were piled up. There were strange rocks everywhere, and under the darkness, it seemed to be inexplicably oppressive.

According to common sense, the seabed has always been a place where monsters emerge in endlessly, but this gully is indescribably silent, without any abnormal movement. He descended dozens of miles in the gully and did not even see any real living creatures.

Chu Mu's expression was tense, and his magic power was flowing around him. A faint sharp edge lingered around him, as if he was already undisguisedly vigilant.

The spiritual energy on the seabed is rich, and it is impossible that there are no monsters living.

This ravine is even more dense in spiritual energy. There must be a spiritual vein somewhere in the ravine.

In such a place with rich spiritual energy, there are no monsters. That is the biggest anomaly.

Abnormality must mean unknown.

Unknown means unpredictable danger!

"The location has changed again?"

After descending for hundreds of miles, Chu Mu suddenly stopped. He held the compass in his hand, and his tense expression became solemn.

According to what he observed on the flying boat, the place where the obscure space fluctuation appeared should be roughly at the height where he is now.

But when he got here, this obscure spatial fluctuation changed its direction again.

Not to mention descending for dozens of miles, the position has also changed. It seems that from this ravine, it has been embedded in the rock wall on the side, and it has penetrated dozens of miles into it.

"Is it an irregular natural change, or is it a change caused by being spied on?"

Chu Mu's eyes moved slightly, and the vigilance in his heart seemed to be a little stronger.

If it's the former, that's easy to say.

If it is the latter, it undoubtedly means that the ruins have an owner, and this trip to the ruins is probably going to be difficult.

Chu Mu looked around, then raised his hand and threw out a sword light. The sword light sank into the rock wall and endured the pressure of countless seawater. The stone walls that had long since transformed into spiritual materials were as fragile as tofu after being washed away by spiritual energy.

In just an instant, under the stirring of the sword light, a simple underwater cave was formed.

Chu Mu took one step forward, entered the cave and sat cross-legged, his eyes slightly closed, the compass suspended in front of him, and he monitored the obscure space fluctuations again.

This time, the monitoring lasted for nearly ten days.

The results obtained made Chu Mu feel relieved a little.

The azimuth changes of spatial fluctuations seem to be just irregular natural changes, rather than man-made manipulation.

On one occasion, the direction of the spatial fluctuation was even outside his cave.

However, even though the space fluctuation was right in front of him, no matter how hard he tried, he still couldn't catch a glimpse of it.

The pattern of changes in orientation is even more difficult to detect. It is hundreds of miles in radius, the orientation is uncertain, and the time of change is uncertain. There is no pattern at all.

The only gain was probably that he knew the reason why the spiritual energy in this place was so strong but no monsters existed.

And this reason is even more simple. With such a large coverage area and such random spatial fluctuations, no matter how obscure they are, they will inevitably have a certain impact on the spatial stability of this area.

As for monsters, their instinctive senses are often extremely keen, and their sense of their living environment is even more acute.

Changes in the living environment will naturally arouse the vigilance of monsters.

After all, no living being will survive in an unsafe place.

"If that's the case, then we really have to wait...a period of time?"

Chu Mu pursed his lips, seeming a little hesitant but also a little relieved.

Fortunately, before he came, he had already been mentally prepared to wait for a long time.

Retreating for a period of time is considered a normal thing in the Jindan realm.

His sleeves were rolled up, and as usual, he had not left any traces to be seen here. With one step, he transformed into a red sword light and rose into the sky along the ravine from the bottom of the sea.

Seeing Chu Mu appear, Zhao Shuang and the three people who had been waiting for a long time on the flying boat seemed to be clearly at peace.

In such a crisis-ridden sea, without the protection of Chu Mu, the only result of just the three of them building a small foundation would be... death without a burial place!

"Chu is very curious about this deep sea. How did you get to this place with your cultivation in the foundation-building realm?"

After entering the flying boat, Chu Mu's first words were meaningful words to Xie Yu, who was standing in front of him.

Xie Yu's expression changed slightly, but he seemed to have expected it. He quickly bowed his hands and bowed: "Senior, please forgive me, this junior is following the seniors of my clan."

Chu Mu's expression did not change, and he looked at Xie Yu and the three people in front of him with interest, waiting for a satisfactory answer.

"The junior came here following the seniors in the clan when he was still in the Qi training realm..."

Xie Yu explained methodically.

A very clear answer, but one that could not confirm whether it was true or false, was also placed in front of Chu Mu.

According to what Xie Yu said, he followed a Nascent Soul ancestor of the Xie family when he was in the Qi training realm. It was considered a trial for the Xie family. At that time, many disciples of the same clan also participated...

"In other words, have you ever been inside this ruins?"

Chu Mu didn't care whether the statement was true or not, and pointed to the key point.

Xie Yu handed over another jade slip and said respectfully:

"This is the internal information of the ruins recorded by this junior. Senior, please check it out."