The storm continued, and the entire island was shrouded in darkness, as if it were a magic island. The wind and clouds changed, the mountains collapsed and turned into ashes, and countless ancient trees and elixirs were swept away by this storm, and the entire Xiaoxian Island looked in a mess, completely devoid of the previous fairyland.

It's just that these have little to do with Lei Yu anymore, and the cave they are in is extremely strong, enough to withstand the invasion of that force. And such a discovery also made Lei Yu breathe a sigh of relief, the scene he had just experienced was too terrifying. If it weren't for the "Chaos True Thunder", he really didn't know what would happen to the Dao.

The cave was not big, it was pitch black inside, and a cold aura came from the depths of the cave, which made Lei Yu and Yao Min'er shiver, but after a while, this breath disappeared, and the two of them did not notice anything unusual, only that the cave was too cold.

They sat cross-legged in the cave, each took out their own Lei Yuan Dan and swallowed it, recovering their thunder power, after all, no one knew what kind of danger Lu Dao would encounter in the future.

In the cave, streams of pure thunder flowed out and entered the bodies of the two of them. The thunder power that had been lost due to that mysterious power began to recover gradually.

Outside the cave, the infinite storm was still raging, and neither of them had any intention of going out, they went deep into the cave, quietly waiting for the moment when the storm ended.

It's just that what they don't know is that in the center of Xiaoxian Island, the magic mountain shook more and more, and the whole mountain was full of demonic energy, as if a demon had been born, turning it into another demon world.

On the Magic Mountain, a series of evil demon phantoms emerged, either fierce and vicious, or evil and enchanting, full of strange aura, like ten thousand demons dancing, the whole magic mountain surged, and the huge mountain seemed to be likely to explode at any time.

"You two beasts, if this Demon Ancestor is born, he will definitely take the first one of the two of you, you will wait for me!" A fierce voice came from the Demon Mountain, the voice was full of thick anger, as if a strong wind was coming, and the sound alone made people frightened.

"Hehe, stinky old monster, if you have the ability, you can come out for me, we will wait here to see who is powerful. A middle-aged man appeared on the Magic Mountain, with a lewd smile on his face, and said unceremoniously to the demons in the Magic Mountain.

He had a grin on his face, completely unaffected by the demons in the Demon Mountain. Suddenly, with a wave of his big hand, infinite thunder power gathered from all around, rushing towards the five mountains around the Demon Mountain.

Suddenly, the five mountains bloomed with the most brilliant light, as if they were luminous bodies, forming a wonderful formation, fiercely subduing the magic mountain.

Golden light emerged from the five mountains and pressed straight towards the Demon Mountain. In an instant, the demonic energy that was originally raging in the Demon Mountain was suppressed, the demonic phantom in the void began to disperse, and the sky began to clear again.

The five mountains, each of which is ten thousand feet high, not much shorter than the magic mountain, surround the magic mountain, like a large array, mobilizing the thunder power on Xiaoxian Island to jointly suppress the movement in the magic mountain.

This is a large array composed of the power of the entire Xiaoxian Island, no matter how the demons in the Demon Mountain move, they can't resist this force, and finally the Demon Mountain regains its tranquility again, and the originally violent demonic energy has calmed down again.

The inky black magic mountain is still the same, but it is not as fierce as before. The five mountains around the Magic Mountain also began to dissipate their brilliant light, and everything seemed to be calm again, but after calming down, the voices of the demons in the Magic Mountain could still be heard.

"I'm not reconciled, I'll be able to break out!" the demon's voice gradually became quieter, and finally became inaudible. He failed again, defeated in the great array of five mountains, and could only retreat helplessly, hibernating, waiting for the next impact.

"Stinky old monster, there is a big array of Wuyue, don't you want to rush out, you will die of this heart!" The middle-aged man looked at the magic mountain that was gradually calming down, and the corners of his mouth couldn't help but show a hint of mockery. Then, he turned into a streamer and left the place.

From beginning to end, he didn't make much movement, as if he had done something insignificant.

On the other side, in the cave, Lei Yu was sitting cross-legged on the ground, his face calm and waveless, holding a few Thunder Source Stones on each of his hands, absorbing the thunder power in the Thunder Source Stones.

Streams of pure thunder power poured into his body, and finally submerged into the Tianchong acupoint, and the thunder power he originally consumed gradually recovered under the effect of this thunder force, and there was even a hint of improvement.

Time passed slowly, Lei Yu stayed in the cave, the aura on his body gradually became stronger, he was consolidating the realm, making his foundation more solid. During this time, he did not cultivate again, but calmed down and slowly clarified his state of mind.

Since he was promoted to the Lei Dan stage, he had never had such an opportunity to cultivate, and this was a rare opportunity for him, and he didn't want to miss it.

The heart is like a mirror, Lei Yu's heart calmed down, slowly combing the harvest of this time, in the Tianchong acupoint, all kinds of thunder power precipitated, "Chaos True Thunder", "Nine Shadows Yellow Spring Thunder", "Stealing the Sky and Stealing Thunder" separated around, forming a round ball, blooming with various colors of light.

This is the basis of his thunder power, and all of his power comes from these orbs. If the orbs shattered, all of his strength would be gone.

The divine thoughts penetrated deep into the Tianchong acupoint, and Lei Yu continued to comb through these balls to remove all the impurities contained in them. And with Lei Yu's efforts, these balls began to become more and more transparent, like crystals, crystal clear, blooming with a more dazzling light.

All the development was beyond Lei Yu's expectations, his divine thoughts had been further developed after being promoted to the Lei Dan stage, and they could already radiate a radius of thousands of miles, and the impurities in these spheres were immediately revealed. Then, he mobilized a powerful thunder force to expel these impurities from his body.

This kind of thing will undoubtedly be very complicated to do, but Lei Yu is tired of it, combing it over and over again, his thunder power is more refined, he feels that the whole person is comfortable, 108,000 orifices are opened, and thousands of thunder power are swallowed, making his whole person excited.

It's just that this kind of combing has a very limited effect on the "Chaos True Thunder", and Qi Lei, who is the first on the Immortal Thunder List, is not so easy to sort out. In addition, the "Chaos True Thunder" is small and pitiful compared to other strange thunders, so naturally this kind of combing is even more difficult.

However, it was in this combing process that Lei Yu discovered some strange changes. The ball formed by the "Chaos True Thunder" actually had some abnormal movements, and the source of that abnormal movement came from inside the cave.

Lei Yu wondered in his heart, this cave is not very big, it can even be said to be very small, the depth is only hundreds of zhang, at a glance, the entire cave is presented in front of him.

Such a place would actually make the "Chaos True Thunder" have a trace of induction, which made Lei Yu feel a little incredible.

"How is it possible, is there something in this cave?" Lei Yu opened his eyes and stood up again. His eyes looked into the depths of the cave like torches, but he still didn't find a trace, the empty cave was unobstructed, hollow, and there was nothing to hide.

Lei Yu didn't believe it, but that breath was real, and as time went by, that breath became thicker and thicker, and in the Tianchong acupoint, the ball that the "Chaos True Thunder" turned into also began to become irritable, as if something was calling it.

Lei Yu was puzzled, but then remembered something. At the beginning, when he was still in the fog of the ocean, he once felt a strange aura. Originally, he didn't know what that breath was, but now that he thought about it, it was very similar to the original breath.

This discovery surprised Lei Yu, he didn't know what kind of thing was that actually caused the "Chaos True Thunder" of the first strange thunder of the heavens and all worlds to have a strange movement. However, this did not prevent him from drawing conclusions in his mind.

"It seems that the things in here are not small!" Lei Yu muttered to himself in his heart, he glanced at Yao Min'er next to him, and saw that she was still recovering her cultivation, so he made a decision at the moment and went to the depths of the cave.

The sound of clear footsteps sounded in the cave, which seemed to be extraordinarily empty, and Lei Yu walked very slowly, stepping on the smooth stone, and there was a burst of sound, which spread in the cave.

He was feeling the breath and wanted to know more. As he gradually walked towards the cave, the aura became thicker and thicker, and the gray ball that the "Chaos True Thunder" turned into became more and more violent.

He knew that the thing that produced this breath was in this cave, but he didn't find it.

The footsteps approached the depths of the cave step by step, the distance of hundreds of zhang was too short, and in just a moment, Lei Yu had completed most of the distance of the cave, and he was only a little short of reaching the end of the cave.

"The 'Chaos True Thunder' is even more intense, could it be that that thing is inside this cave?" Lei Yu stood in front of a stone wall as smooth as a mirror, and a trace of doubt appeared on his face. The breath came from the inside of the stone wall, and the only explanation was that the thing was inside the stone wall.

"It's obviously a very ordinary stone wall, and there is nothing abnormal!" Lei Yu stretched out his right hand and stroked it on the stone wall.

A cold sensation came from his hand, and he didn't feel anything unusual. It's just that when this thought came to his mind, this stone wall suddenly changed, and a white light came out of the stone wall, and the whole stone wall began to crack, turning into a snow-white and translucent light gate.

Through this light door, a small room appeared in front of Lei Yu, and what made him pay more attention was a golden corpse lying on the ground.