The trench section is relatively intact, as if it had been cut by a sharp object, and does not look like it was formed by the movement of the earth's crust at all.

Because, if it is because of the movement of the earth's crust, the section can never be so complete, but uneven.

After a slight pause, Zhang Mo was suddenly startled and realized a certain possibility: "Could it be that the immortal cultivator's flying sword cut it out?"

Thinking of this, Zhang Mo couldn't help but enter the trench and take a closer look.

There is no shortage of cultivators on the earth, whether it is a Luoyang monk who cultivates immortals, or Liu Ruolan who cultivates demons, or a hermit who practices martial arts.

There are all kinds of indications that there was once a famous cultivation on the earth, but later, for some unknown reason, it actually declined.

The aura will not be depleted for no reason, something big must have happened.

It's just that there's no way to verify what happened.

However, Zhang Mo always felt that there seemed to be something hidden in the trench at the bottom of the sea, and it was even likely to be related to the depletion of spiritual energy.

Of course, these are just Zhang Mo's speculations, and there is no substantial evidence.

At this moment, Zhang Mo is exploring the trench, not to track down anything, but simply to find a place to stay, he can't always wander on the bottom of the sea, maybe he will meet Jin Yangzi at some point!

The trench is not very deep, it is only two kilometers long, and there is nothing at the bottom of the trench except for some gravel and plankton.

After investigating, Zhang Mo quickly left.

After a little effort, Zhang Mo came to another trench.

This trench is relatively deep, 4,000 meters, and there are relatively many species in it.

However, it is still empty space, and the primordial spirit sweeps over, almost at a glance, and it is not suitable for hiding!

Zhang Mo continued to search, but he was not in a hurry, Jin Yangzi should not be looking for it for a while.

I don't know how many days later, Zhang Mo felt chest tightness, shortness of breath, and dizziness again, and he knew that he had to go to sea to breathe.

Immediately, Zhang Mo kicked the soles of his feet hard, and his body shot out like a cannonball.

In just half a minute, we reached the surface of the sea.

At this moment, it is noon, and the sun is shining.

However, the sea was not very calm, and the wind and waves were very strong.

Zhang changed his breath, did not stop, quickly sank to the bottom of the sea, and continued to look for a place to hide.

If after more than ten days, Jin Yangzi, who has been looking for Zhang Mo at the bottom of the sea, suddenly realizes a problem, Zhang Mo will definitely surface for ventilation.

Before, Jin Yangzi hadn't noticed it, because he didn't feel anything wrong when he stayed at the bottom of the sea.

But just now, I suddenly felt short of breath and had to surface to breathe.

Thinking of this, Jin Yangzi immediately released the Linglong Butterfly and ordered: "Give me a close monitoring of the situation on the sea, and report to me as soon as I catch Zhang Mo's scent!"

"Yes, master. Linglong Butterfly replied.

Subsequently, Jin Yangzi dived to the bottom of the sea again to search.

Now, Jin Yangzi is equivalent to installing a monitor on the sea, as long as Zhang Mo shows the sea, he will definitely know about it.

Zhang Mo didn't know this, and after diving to the bottom of the sea, he continued to look for a hiding place.

At this time, a cloud of gas suddenly erupted not far ahead, gurgling.

Seeing this, Zhang Mo couldn't help but pause, and leaned over with his heart.

It is a super deep trench, not to mention ** kilometers, or even tens of thousands of meters.

The deepest part of the trench is faintly visible magma, and the gurgling sound is the gas released by the chemical changes that the magma has eroded the rock.

In addition to these, the ecology of this trench is also relatively complex, in addition to plankton, algae, there are also a large number of crabs, jellyfish, electric eels, and other unnamed marine life.

It is no exaggeration to say that this trench is equivalent to an independent underwater world, with its own set of biological cycles.

Seeing this, Zhang Mo couldn't help but stop, secretly surprised in his heart.

You must know that magma is a very terrifying thing, whether it is ordinary humans or their immortal cultivators, they are very afraid.

However, there are now so many undersea creatures that depend on magma to survive.

However, after thinking about it carefully, Zhang Mo was relieved.

Although the magma is terrifying, at the bottom of the trench above 10,000 meters, even if it can release a lot of heat, it will not reach here.

On the contrary, the heat emitted by the magma nourishes many plankton, allowing them to multiply rapidly, creating an environment where algae can live.

Finally, some other organisms feed on algae.

To put it simply, it is a process of raising fish with shrimp and fish raising big fish.

Zhang Mo is very satisfied with this, the species are rich, the terrain is complex, and there are certain dangers.

If Jin Yangzi really finds this place, he may not be able to find himself.

Even if you find yourself, you can still use magma to design a wave.

Thinking of this, Zhang Mo was relieved in his heart, and secretly said to himself: "That's it!"

Immediately, Zhang Mo landed in this trench.

Zhang Mo didn't go too deep, but he wasn't in the upper layer of the trench, almost four or five thousand meters in the middle layer.

Because the species are most abundant here, the terrain is relatively more complex, making it more suitable for hiding.

Of course, the more important thing is that the pressure of the sea water will double and increase further down, which is no longer something that Zhang Mo can bear.

Zhang Mo found a natural cave on the wall of the trench, surrounded by elderly coral, which is perfect for hiding.

Immediately, Zhang Mo settled in this natural cave.

Now, the only thing missing is oxygen.

If there was no source of oxygen, Zhang Mo would not have been able to stay here for a long time, and he would have to surface every few days to breathe.

Maybe once or twice is fine, but after a long time, it's hard to say.

Zhang Mopan sat down and thought carefully about oxygen.

It's impossible to wait for oxygen to be delivered to your door, so you have to figure it out yourself.

"Gurgling ......"

Suddenly, there was another noise at the bottom of the trench, and then a large number of bubbles were seen pouring out of the bottom of the trench.

Seeing this, Zhang Mo couldn't help but raise his eyebrows, "Will there be oxygen in these bubbles?"

Immediately, Zhang Mo forcibly detained a ball of bubbles with Zhenyuan.

Looking at the bubbles wrapped in Zhenyuan in his hand, Zhang Mo was slightly stunned, and said secretly: "How can I verify whether there is oxygen in these bubbles?"

Of course, it was impossible for Zhang Mo to inhale directly with his nose, or directly swallow this mass of gas wrapped in Zhenyuan.

Who knows what the bubbles that come out of the ocean floor contain, and whether they are poisonous or not?

Slightly stunned, Zhang Mo had an idea, he couldn't breathe these gases directly, but there were a large number of undersea creatures nearby, and he could find them to do experiments!

Immediately, Zhang Mo swept his mind and caught a sea crab.

Seriously, it's really rare to see a sea crab in such a deep trench, only to see that the shell of the crab is white, and it moves very fast.

However, no matter how fast he is, he can't escape Zhang Mo's capture.

Soon, Zhang Mo caught four or five sea crabs.

Afterwards, I saw Zhang Mo put these four or five sea crabs into the gas wrapped in Zhenyuan.