Only Chen Rui knew that there was a strong murderous intent under the calm and waveless sea.

Chen Rui intends to go back and enter the underwater pit again to check it out.

Because Chen Rui can be very sure that the deep hole under the sea must have been dug by a prehistoric cultivation civilization.

Otherwise, it is difficult to understand that there is such a strong concentration at the bottom of the pothole, which is equivalent to the concentration of aura accumulated by more than a dozen spirit gathering arrays.

Moreover, when Chen Rui dived to the bottom of the pothole for the first time, he found that the pothole was in the shape of an inverted cone. A road with a width of 5 or 6 meters was excavated on the wall of the hole. It spiraled downward, and trucks could pass through it. The 'road' has been driven to the bottom of the pothole more than 300 meters deep.

On the wall of the cave, Chen Rui found traces of artificial excavation and excavation, full of very disordered cutting marks, excavated pits, and parallel caves with a depth of several meters to ten meters.

All indications are that this is not a naturally formed pothole, but an artificially excavated and excavated pothole.

It makes Chen Rui feel a bit like a diamond crater in Siberia, Russia.

Chen Rui was very curious as to what the purpose of the prehistoric civilization was to dig this pit on the seabed with a depth of more than 6,700 meters.

You must know that it is very difficult to excavate such a large and deep pit in such a deep seabed.

The discovery of this underwater pit made Chen Rui truly realize the mystery and unpredictability of the sea.

The sea is mysterious.

Although there are many countries' submersibles that can reach 99% of the seabed, human knowledge of the seabed may be less than 1%. For humans, it is a restricted area, and human understanding of the deep seabed is very limited. There are still many unsolved mysteries in the deep sea.

There are many legends about the sea.

For example, the architectural ruins of prehistoric civilizations on the seabed, the underwater pyramids, the people living on the seabed, and so on.

Chen Rui hopes to explore the deep seabed in the future, a forbidden area for human beings. This is a very challenging task for Chen Rui. Very exciting, exciting, very fulfilling thing.

Chen Rui hopes to solve the countless unsolved mysteries arising from the continuous exploration and understanding of the ocean.

Having practiced the Immortal Cultivation Technique, Chen Rui can traverse the sea, and can easily dive into the deep seabed that human beings have never reached.

Human forbidden zone.

Chen Rui drove the speedboat back to the sea full of danger and murder.

The yacht was parked on the sea above the crater.

Chen Rui jumped into the sea and dived into the bottom of the sea.

More than ten minutes later, Chen Rui stood in front of the hole in the seabed again.

Look at this deep, dark pothole under your feet.

Chen Rui knew that at the bottom of the pothole a few hundred meters below was a huge Atlantic sea monster.

This time, Chen Rui did not sneak along the pothole like he entered the pothole for the first time.

Chen Rui performed the earth escape technique, and the person turned into a khaki phantom. The khaki phantom looked like real matter as nothing, and sank into the ground in violation of the principle of matter.

After Chen Rui sank to the ground, he kept drilling down.

Sudden. Chen Rui found some crystals in the ground.

The crystals are colorless and transparent, and the texture is very hard and smooth. Crystal clear.

Chen Rui took these crystals into the Pregnant Sea Pearl space.

Holding the spar in his hand, facing the sunlight in the space of the pregnant sea pearl, the sunlight reflects colorful through the spar, like the colors of the rainbow, dazzling and colorful.

Chen Rui can clearly see the inside of the crystal, and the inside of the crystal is very small. But it is composed of small crystal particles of various shapes that can be seen with the naked eye.

Quite miraculous.

Chen Rui has 5 such spar in his hand.

Small is the size of a thumb.

The big ones are the size of an egg.

Chen Rui did not know what this crystal was called.

However, Chen Rui can guess that the prehistoric cultivation civilization of the earth dug this pit on the seabed with a water depth of 6,700 meters. It is very likely that this crystal was excavated.

Just like Russia dug the "peaceful" diamond mine in Siberia, just to mine diamonds.

Chen Rui estimated that he had drilled about 3,400 meters underground, which was almost the same depth as the bottom of the pothole.

In the process of Chen Rui's drilling underground, he could find such crystals from time to time, and by this time, he had found more than a dozen crystals.

Chen Rui put this crystal into the pregnant sea pearl.

Chen Rui penetrated the soil layer.

Chen Rui was surprised to find that he did not appear at the bottom of the pit as expected, but entered a cave.

The cave is connected to the bottom of the pit.

The cave is filled with sea water.

Here, the water depth has exceeded more than 1,000 meters, and the surrounding sea water has brought a lot of squeezing force to Chen Rui.

The cave was pitch black, and the five fingers could not be seen.

Chen Rui took out the waterproof mining lamp from the pregnant Haizhu space.

Take a look around the cave.

Chen Rui found that this was a large cave, with an area of ​​several hundred square meters and a height of 10 meters.

The cave is a man-made cave, Chen Rui can say with great certainty.

When the light shone on the walls and ceiling of the cave, Chen Rui could find that the walls and ceiling of the cave were very flat and had marks of being cut by sharp tools.

Pieces of slate were laid on Chen Rui's feet, which was unconventional.

Chen Rui felt that the cave was a bit like an oversized matchbox.

In the center of the cave, there is a platform.

Chen Rui swam over.

Chen Rui found some grooves on the platform.

A crystal is embedded in each groove, and these crystals are somewhat similar to those found by Chen Rui in the underground rock layers.

However, these crystals are not colorless and transparent, but come in various colors, including azure blue, khaki, and fiery red….

The crystals are arranged in a special order.

Each crystal is the size of an egg.

The crystals arranged in the middle are fist-sized and blue. If you look closely, you can see that there is a flowing substance in the crystals that is constantly surging.

Chen Rui could clearly feel that the substance surging in the crystal was a very huge energy substance. If these energy substances were detonated, the power of the instantaneous explosion would be very huge.

Chen Rui has arranged many spirit gathering formations, and he has some understanding of the formation.

The crystals are arranged in a special order that behaves like an array.

The way of operation is similar to the formation method, but it is not the formation method.

However, Chen Rui knew too little about this device, so he couldn't think of a better name.

Egg-sized crystals form the nodes of the array, with a blue in the middle, and the fist-sized crystal is the hub of the array.

This is a circular array.

While absorbing the spiritual energy contained in the sea water, it releases it, and maintains a very relative balance with each inhalation and spit.

The source of the rich spiritual energy contained in the seawater of the nearby seas is all derived from this.

The aura exhaled by the formation benefits the creatures in the nearby sea area. (To be continued)

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