Chu Heng's spiritual sense searched little by little at the bottom of the Thunder Pool, without missing any place.

Chu Heng needs to investigate even the corners.

Ouyang Xingchen did not disturb Chu Heng, but just waited quietly.

As long as the formation exists, no matter how hidden it is, it is impossible for it to leave no trace.

But Chu Heng searched most of the time, but no trace of the formation was found.

Chu Heng's spiritual consciousness continued to explore, which was even more rigorous than before, but there was no trace of formation left behind, as if there was no formation here at all.

"Are you sure, there really is a formation here?" After exploring the entire bottom of the thunder pool and not finding any traces of the formation, Chu Heng couldn't help asking Ouyang Xingchen.

"It should... maybe... it's almost... it exists." Ouyang Xingchen was also a little uncertain and said hesitantly.

"Then how did you get in last time?" Chu Heng slapped his forehead and said helplessly.

"I just went in by chance, just by chance." Ouyang Xingchen said.

"Do you still remember what changes happened to this thunder pool before you entered?" Chu Heng asked, "Or, is there something special?"

"I was here to be refining Thunder, and I didn't notice the situation around me at all. When I woke up, I appeared inside." Ouyang Xingchen said, "As for how I got in, I don't know."

"Then why do you say there is a formation here?" Chu Heng frowned.

"I guessed it." Ouyang Xingchen said.

"Puff!" Chu Heng almost spit out an old blood. You just made me investigate for such a long time based on just one guess?

"By the way, before I went in, I seemed to vaguely feel that the entire thunder pool became different, as if there was a special power." Ouyang Xingchen tried his best to recall the previous situation and said, "That power is very domineering, full of destruction, and at the same time there seems to be a desire, just like a person who wants to eat when he is hungry, yes, that's it!"

Upon hearing this, Chu Heng's brows frowned tightly.

Any strange spirit who wants to grow up needs to absorb endless energy from heaven and earth, just like the Qinglian Holy Fire will also devour countless monsters and attack warriors in the process of growing up.

"Since the green lotus holy fire needs to devour monsters and warriors to evolve, does the thunder spirit also need to devour creatures to grow?" Thinking of this, Chu Heng's eyes suddenly lit up and he said in his heart.

Ouyang Xingchen said that when he entered, Lei Ling was about to transform. Since he wanted to transform, he might need extremely huge energy.

Therefore, Ouyang Xingchen was not by chance to touch the formation here. The most likely reason was that Lei Ling wanted to eat and brought Ouyang Xingchen into it in an instinctive reaction.

But for some reason, Ouyang Xingchen saved his life and was not swallowed by Lei Ling.

"Maybe there is really some kind of formation here, but with his current cultivation level, he can't find it at all." Thinking of this, Chu Heng felt it was a little reliable and said in his heart.

After all, Yunlei Sect is a sixth-grade sect, and the formation masters in the sixth-grade sect must be extremely powerful.

This formation is to hide the thunder spirit, and it will definitely be arranged more hidden and will never be easily discovered.

"Instead of trying to find a formation and then breaking it, it is better to let Lei Ling take the initiative to find him and get him in." A cold smile suddenly appeared on the corner of Chu Heng's mouth.

For ordinary people, a hundred years may be a lifetime.

But for the alien spirits that often take thousands of years to mature, a hundred years is not long. At this time, the thunder spirit may still be in the transformation period.

Before this, people from the Yunlei Sect regularly gave food to Lei Ling, so Lei Ling might grow faster.

But the Yunlei Sect was destroyed, and no one fed the Lei Ling, so the Lei Ling's growth rate naturally slowed down.

This is also the reason why Lei Ling will attack Ouyang Xingchen. This is an instinct, the instinct of eating.

Chu Heng couldn't help but feel a little funny. Ouyang Xingchen thought that his luck was against the will of heaven, but in fact he almost returned to the underworld.

However, Chu Heng would not click it out either.

Chu Heng immediately closed his eyes again, his body entered a state of fake death, and began to wait for Lei Ling to come to him on his own initiative.

The so-called fake death state is to minimize all the skills of your body, including breathing, heartbeat and blood flow rate.

Chu Heng didn't know if Lei Ling had consciousness now, but according to Ouyang Xingchen's words, Lei Ling had not taken action even after he had been in for so long. Obviously Lei Ling was waiting for a suitable opportunity.

And this opportunity is that Chu Heng loses consciousness.

As Chu Heng entered a state of fake death, the entire bottom of the Thunder Pool suddenly became quiet.

Although the thunder is violent, because this is a thunder pool, these thunders have become quieter.

Although all the functions of the body were adjusted to the lowest level, Chu Heng's consciousness was particularly vigilant.

Lei Ling did not appear immediately, and Chu Heng was not in a hurry. This was the time when Lei Ling was more patient.

Only when Lei Ling thinks that Chu Heng really does not threaten it will he be brought in.

An hour passed, and the Thunder Spirit was not moving.

Two hours passed, and Lei Ling did not move.

Half a day passed, and Lei Ling still didn't move.

After a day passed, Chu Heng obviously felt that the thunder in the entire thunder pool began to become unusual.

A breath of destruction and domineering began to fill the bottom of the thunder pool, making the thunder at the bottom of the thunder pool turn black.

Chu Heng didn't know where this aura appeared, but it really existed.

Not long after, Chu Heng felt something entangled in his body.

From the thing that was entangled with his body, Chu Heng could clearly feel a desire, his desire for food, exactly the same as what Ouyang Xingchen said before.

Perhaps after realizing that Chu Heng was really not moving, the thunder tentacles that were entangled in Chu Heng began to slowly retreat.

At the same time, a huge thunder vortex appeared from the thunder pool, like a huge mouth, swallowing Chu Heng in.

Chu Heng felt as if he had experienced a space teleportation.

When he opened his eyes, Chu Heng was in a black space.

The entire black space was filled with extremely violent thunder energy, and black thunder arcs were wandering everywhere, and the loud rumbling sound was deafening.

Chu Heng was wrapped in thunder tentacles completely condensed by black thunder, and in front of him was a thunder lake composed entirely of black thunder.

In the Thunder Lake, there is a black thunder dragon entrenched.

This thunder dragon is ten feet long, and black thunders appear all over his body. The hideous dragon head is full of majesty, the two blood-moon-like eyes are extremely shocking, the palm-sized dragon scales emit black lightning, and the five vigorous and powerful claws are even more shining with a faint cold light.

However, the Thunder Dragon was firmly tied by five thick iron chains, one through its head, one through its spine, and three through its left and right and fifth dragon claws.

Chu Heng shattered the thunder tentacles on his body and looked at the black thunder dragon in front of him.

Even though it was far away, Chu Heng could still feel a destructive energy and aura from the black thunder dragon.

This black thunder dragon is the thunder spirit that Chu Heng has been looking for.

In just a hundred years, this thunder spirit has been transformed successfully.

Chu Heng could feel that although the Thunder Dragon had successfully transformed, it only gave birth to a very shallow consciousness.

This consciousness has just been born, just like a baby is just born, and has no ability to judge himself at all.

"The transformation was successful? What kind of thunder is this?" Ouyang Xingchen said in horror at the thunder dragon in front of him.

"You don't know what kind of thunder this?" Chu Heng said.

"I don't know the black thunder." Ouyang Xingchen shook his head. He only knew that this was the thunder spirit, but he didn't know what it was: "It seems that this kind of thunder spirit has not been recorded in the Record of Alien Spirits in the World."

"The Chaos Heavenly Thunder was born in the chaotic space and grew up in thousands of thunder sources." Chu Heng said: "There should be another kind of thunder spirit here, but that thunder spirit was swallowed by the Chaos Heavenly Thunder and became the nutrient for the evolution of the Chaos Heavenly Thunder."

"Chaos Heavenly Thunder? Do you think this black thunder is Chaos Heavenly Thunder?" Ouyang Xingchen said in horror.

Chaos Heavenly Thunder let out an extremely loud dragon roar, and his ten-foot-long body stood up, his blood-moon-like eyes looked at Chu Heng, and black thunder arcs appeared on his body, ready to launch an attack at any time!

Although Chaos Heavenly Thunder does not have the consciousness of Xingchen, it also has the instinct of eating, and is instinct at this moment.

"How do you plan to refine the Chaos Thunder Spirit?" Seeing that the Chaos Heavenly Thunder had already stood up, Ouyang Xingchen couldn't help but ask nervously.

"Just look at it." A mysterious smile appeared on the corner of Chu Heng's mouth, and he took the lead in heading towards the Chaos Heavenly Thunder before the Chaos Heavenly Thunder launched an attack.

The thunder dragon transformed by the chaotic sky thunder slammed the Thunder Lake and set off a terrifying and violent black thunder tide, containing supreme power.

The wings of the Netherworld behind Chu Heng suddenly shook, soaring into the sky and turning over the black thunder tide.

Then, Chu Heng's body flipped in the air, and the true energy in his body burst out instantly, and countless afterimages were separated, and continued to shoot towards the Thunder Dragon.

The Thunder Dragon roared angrily, raised the huge dragon's head, opened its mouth and spit out a black thunder.

The black thunder was extremely fast, and in an instant, it penetrated through the space and accurately captured Chu Heng's true body among countless afterimages.

"Bengtian ruler!" Chu Heng shouted softly, and the golden ruler condensed like lightning in his hand, which instantly turned into a golden stream of lightning to accurately hit the black thunder.

With a loud bang, the Beng Tianji and the Black Thunder collided fiercely, causing a strong and fierce energy explosion.

Chu Heng moved the Great Sun Immortal Body, and supported a golden light film on his body. At the same time, he protected his body with the wings of the Netherworld and rushed into the energy storm.

After a moment, Chu Heng rushed out wildly and rushed over the black dragon's head. Energy chains burst out from Chu Heng's body.

These energy chains are condensed by the true energy in Chu Heng's body, and are full of various energy runes, which have a natural suppression effect on the alien spirits.

The energy chain hit the black dragon's body, deeply locking the black dragon's flesh.

Then the runes above were bright, and an extremely powerful devouring force was emitted from it, and began to crazyly absorb the energy of the Chaos Heavenly Thunder.

Chu Heng's hands continued to change, and special seals were made. These seals acted on the black dragon through chains and began to seal the black dragon heavily.

Streams of black thunder rushed into Chu Heng's body along the energy chain, circulating the Five Spiritual Art of Taichu, and crazily refining and absorbing these black thunders.
To be continued...