In the Little Immortal Thunder Realm, in a volcanic group, within a radius of thousands of miles, the flames rushed, turning this place into a sea of fire, and the scorching temperature baked all around, melting the earth, turning into a piece of magma, rushing away.

This is a world of flames, volcanoes are all over the place, endless flames rise to the sky, occasionally magma erupts from the depths of the volcano, black smoke obscures the sky, day turns into night, this place seems to sink into darkness forever, and can never expel the smoke and clouds in the sky.

"Is this the Heavenly Fire Domain in the Little Immortal Thunder Realm?"

Lei Yu stood on top of a volcano thousands of feet, surrounded by magma rushing down, forming a long river of magma, rolling endless flames, turning the places he passed along into ashes.

The earth is melting, and everything is so fragile in the face of infinite magma.

The divine thoughts spread out, and in a radius of hundreds of miles, the flames were rolling, and dozens of active volcanoes stood on the earth, and red magma erupted from these volcanoes, as if they were about to melt the heavens and the earth.

The Domain of Heavenly Fire, this is a strange place in the Little Immortal Thunder Realm, containing endless heaven and earth flames, covering the heavens and the earth, turning into a sea of fire.

At the beginning, before Lei Yu and the others entered the Little Immortal Thunder Realm, the Heavenly Punishment Elder had handed them a simple map of the Little Immortal Thunder Realm. This map records some of the terrain of the Little Immortal Thunder Realm, which was drawn by the senior brother who had entered the Little Immortal Thunder Realm at the beginning, although it was simple, but it was very important for Lei Yu and the others.

With this map, the safety of Lei Yu and the others has been improved a lot, at least some dangerous places can be avoided, so as not to be sent to death without knowing the situation.

After Lei Yu got out of trouble in the Petal World Realm, after a few days of confusion, he finally figured out where he was, and combined with this map, he had a trace of scheming in his heart.

It has been several days in the Little Immortal Thunder Realm, and I already have some understanding of the Little Immortal Thunder Realm Lei Yu, this place is indeed a cultivator's cave blessed land as the outside world says, but this does not mean that every place in the Little Immortal Thunder Realm is like this.

The level of thunder power in most places in the Little Immortal Thunder Realm has reached the level of a top-grade thunder vein, and some of them have even reached the top-grade thunder vein, but this level is not so remarkable for Lei Yu and the others. Therefore, he needed a more suitable place to practice.

And at this time, the Heavenly Fire Domain entered Lei Yu's eyes. This is one of the several Cave Heaven Blessed Lands indicated on the map, and the fire attribute is rich in thunder power, which is extremely beneficial for cultivation. Not only that, but according to the early map, except for some extremely dangerous places, the other areas of this Heavenly Fire Domain are not so dangerous.

Such a place was undoubtedly wonderful for Lei Yu, so without thinking too much, Lei Yu rushed towards the Heavenly Fire Domain, wanting to use the endless Heavenly Fire here to cultivate the Five Elements of Thunder.

"When the disciples of the major dynasties and sects entered the Little Immortal Thunder Realm, they were randomly teleported to other places. Besides, now that I have lost contact with Void Words and the others, it is the time for me to cultivate!"

Lei Yu made a decision in his heart, the Heavenly Fire Domain was definitely the best place to cultivate.

The streamer flashed, and Lei Yu left the mountain peak and headed towards the interior of the Heavenly Fire Domain. Endless flames rushed to the face, even the air was extremely hot, looking towards the earth, magma was everywhere, connected into a lake of flames, the size of a radius of dozens of miles.

A fiery serpent sprang up from the lake of flames, spewing crimson flames from its mouth, stirring above the surface of the lake, causing ripples and melting the rocks at the edge of the lake of flames.

This fire snake is only a few inches in size, and its strength is only in the thunder qi stage, which is not worth mentioning in Lei Yu's eyes. It's just that the appearance of this fire snake shocked Lei Yu's heart, because this is not a real thunder beast, and it does not have a flesh and blood body, but a spiritual object formed by flames, which can be called a fire spirit.

If this fire snake can cultivate for tens of thousands of years, hundreds of thousands of years, it can definitely grow into a behemoth, and then I am afraid that even a strong person in the Immortal Thunder Stage will not be its opponent, because it is composed of flame beings, and its body is flame, and ordinary cultivators will not be able to kill it at all.

"I didn't expect that there would be a fire spirit here, if it goes deeper, I'm afraid it will be even more terrifying!"

Seeing this, Lei Yu also had a certain understanding of this Heavenly Fire Domain. Although the map marked the Tomorrow Fire Domain is not a dangerous place, what he saw and heard along the way still made him decide to be vigilant, and the thunder power in his body was secretly lucky, and once there was an accident, he would definitely take action at the first time.

The Heavenly Fire Domain is thousands of miles in circumference, vast and boundless, Lei Yu flew all the way towards the depths of the Heavenly Fire Domain, and the air became hotter and hotter, as if there was a trace of fire in the air, even a cultivator like Thunder Feather couldn't bear the increasingly intense heat.

Moreover, not only that, but the fire attribute thunder power in the void also became more and more intense, almost reaching the substance. The fiery red light continued to flash in the void, and Lei Yu secretly carried the "Five Elements Thunder Sutra", absorbing the rich fire attribute thunder power in the void, and pouring into the heavens.

Faintly, a scorching feeling emerged from the heavenly ** aperture, as if there was a flame scorching, and even began to expel the Aoki thunder hidden in the heavenly ** aperture.

"River of Flames!"

Lei Yu stood in the void, and at his feet, a river of flames hundreds of zhang wide flowed between the mountains.

It was a wide river, and the flames were blazing, and the whole river was made up of flames, and it flowed down the river, and I don't know where it was going. Everything along the way was reduced to ashes like incomparably fragile porcelain in front of this river of flames.

On the left and right of this long river, mountains of flames plunged into the sky, and infinite magma erupted from the crater and merged into this long river of flames, which was even hotter and magnificent.

This is a big river in the mountains, but compared to the ordinary big river, everything here is made of flames, and it is a real world of flames.

"It is rumored that the Heavenly Fire Domain was formed by the immortal fire of the Immortal Thunder Realm, and it seems that this is true. If it weren't for the immortal fire, how could such a scene be created?"

Lei Yu remembered a rumor, which was recorded on the drawings of the Little Immortal Thunder Realm.

The senior brother who had once entered the Heavenly Fire Domain had speculated that the Heavenly Fire Domain was related to the Immortal Fire. This is because the flames in the Heavenly Fire Domain are not ordinary mortal fires, but have a certain immortal aura, which is not very strong, but it is convincing enough.

"This long river of flames flows out from the depths of the Heavenly Fire Domain, so I'll go against the current and see what kind of scene this Heavenly Fire Domain center is!"

With a flash of light in his eyes, Lei Yu looked at the end of this long river of flames, where the flames were still leaping, but they were even more magnificent than here, and bursts of roaring sounds came out, earth-shattering.

The fire-type thunder was furious, and it seemed to be a Jedi place, and no creature could survive. However, these things were enough to attract Lei Yu's gaze, and vaguely, he seemed to sense that something was waiting for him in the depths of the Heavenly Fire Domain.

It was a wonderful feeling, indescribable, but vaguely guiding Lei Yu's way forward. In order to find out the truth, he had already made a decision in his heart that he must investigate it carefully.

The scorching aura in the sky was endless, becoming more and more intense, and endless firestorms hit every moment, making Lei Yu frown. These flame storms were so powerful that even the powerhouses of the Thunder Qi Stage would probably not be able to resist them, and they could only be reduced to ashes.

It's just that for a Thunder Gang Stage tenth-order peak cultivator like Lei Yu, these flame storms were just some troubles, and they weren't enough to stop them.

Thunder Feather continued to move forward, but the speed slowed down, and the long river of flames rushed endlessly, and the flames burned above the river, sweeping everything into it.

The road ahead became more and more difficult, and the flames of the Heavenly Fire Domain became more and more powerful, and Lei Yu had to put a layer of shield around his body to prevent the flames from burning on his body.

"That's a fire bull, it already has the cultivation of the Thunder Gang Stage, and it is devouring the pure fire attribute thunder power, I'm afraid it won't be long before it will go to the next level......"

"Fire Monkey! That turned out to be a Fire Monkey, swallowing spiritual energy and cultivating his own body......"

Along this long river of flames, Lei Yu saw more things that surprised him, one by one fire spirits appeared on the banks of the long river of flames, or absorbing thunder power, or playing and playing, and so on, but this discovery made Lei Yu feel uneasy in his heart.

For example, this kind of spiritual creature that was completely transformed from flames, once it was cultivated, its strength was absolutely terrifying, and it was even more powerful than an ordinary human cultivator. There are so many fire spirits in this place, I am afraid that there will be even more powerful fire spirits in the Heavenly Fire Domain.

Such a speculation made Lei Yu couldn't help but be surprised, most of the fire spirits he found now were cultivated in the Lei Gang period, and there were still many thunder qi periods, and the cultivation was not worth mentioning, so there was naturally no problem in dealing with these fire spirits, but if there were fire spirits in the Lei Dan stage and the thunder infant stage, he would have to run away.

Lei Yu's face changed slightly, but since he had come here, he didn't want to return empty-handed. Although the fire attribute thunder power here is rich, it is not as rich as the depths of the Heavenly Fire Domain, and only when he reaches the depths of the Heavenly Fire Domain can he really get what he wants.

All the way up, the fire attribute thunder power became more and more violent, which had a great impact on Lei Yu. He had to mobilize the thunder power in his body to fight against the violent thunder of the outside world.

The heavens and the earth turned into a fiery red, volcanoes erupted, and large areas of magma flowed into the long river of flames, forming a spectacular scene.

This is the source of the river of flames, where thousands of volcanoes stand above the earth, and the crimson magma flows from the various volcanoes, and the most sinister ones come together to form a mighty river of flames.

Lei Yu finally understood why the Flame River was formed, with so many volcanoes to support it, even a wider Flame River would not be a problem. However, soon, Lei Yu set his eyes farther away, and everything there made his heart flutter.