After venting, Yun Fei calmed down and figured out the confusion in his heart, regardless of other people's opinions, he just had to stick to his heart and not be disturbed by external objects.

His heart was ethereal, dusty, sitting cross-legged on the rock, running the Nine Yan Jue to breathe, this time he ran hundreds of miles, most of the spiritual power in his body was consumed, and the true dragon was much dimmer, and he urgently needed the replenishment of spiritual power.

When night falls, the stars are in the sky, and a full moon rises in the sky, hanging in the sky, exuding a holy breath and brilliance, and it is a full moon day.

The moon fell, reflecting the young man, making him look extremely holy, like the son of the moon god descending to the earth.

Suddenly, the wind rose suddenly, and the yin wind roared, and swept towards the sky, as if to blow the stars down, and the dark clouds swept in, instantly filling the sky, and, in the thick dark clouds, there was a thunderous sound, accompanied by lightning.

Opening his eyes and looking up at the sky crowded with dark clouds, Yun Fei frowned slightly, and whispered to himself, "How can there be lightning and thunder, this trial secret realm is really strange." ”

Before the words fell, a loud roar resounded from the deep valley in front of him, heading straight for the sky.

Yun Fei stood up from the rock, his body quickly exploded backwards, and almost at the same moment, the rock he was on exploded, and the gravel shot out in all directions, thumping.

Yun Fei's eyes froze, and a huge head stretched out from the broken rock, its face was hideous, with two three-foot-long horns on its head, and the two beast pupils were the size of human heads, like two blood moons, and there were electric arcs in its eyes flickering and spitting.

It was just a head, it was huge, and if its whole body crawled out of the valley, it would be huge.

"Boom!"

There was an explosion, the mountain was shattered, and the body of the demon beast came out of the canyon, revealing its true body, this time, Yun Fei saw its appearance clearly, and also recognized it, he was shocked, he didn't expect to encounter this kind of demon beast in the secret realm of trials.

This giant beast was more than ten zhang long, not too tall, only about one zhang, its limbs were short and strong, its body was covered with silver scale armor, and it dragged a silver light tail that was two feet long, with a faint arc of electricity entangled.

"Thunder Swallower?"

Yun Fei was shocked, this kind of demon beast devoured thunder and lightning, strengthened itself, and its strength was extremely powerful, seeing this thunder swallowing beast, Yun Fei's pupils shrank, this thunder swallowing beast was already approaching adulthood, even if it was a strong person in the late stage of the soul transformation realm, he did not dare to face it alone.

The huge head turned, glanced at Yun Fei, and then looked up at the cloudy sky, ignoring him.

Belch... Ignored!

Yun Fei was speechless, this demon beast didn't put him in his eyes at all, in its eyes, Yun Fei was just an inconspicuous ant, which couldn't arouse the slightest interest in it.

"Roar!"

The thunder-swallowing beast raised its head and roared, as if it was angry with the sky, expressing its dissatisfaction, the thunder and lightning on the sky seemed to be felt, and the dark clouds became thicker, as black as ink, black and dull, and there was no finger in sight, and there was a suppressed sense of suffocation.

Seeing it like this, Yun Fei guessed that this thunder-swallowing beast would most likely have to complete a transformation with the help of thunder and lightning, and at that time, its strength would rise in a straight line, and even the powerhouses of the Little Spirit Heaven Realm might not be able to subdue it.

The sound shook the mountains and spread far away, and it could be heard clearly dozens of miles away, as if even the dark clouds in the sky were about to be dispersed.

In a mountain col dozens of miles north of this place, a group of more than a dozen people sat together, and a bonfire had been lit in the middle, illuminating the surrounding hall as if it were day.

The bonfire was reflected, and the faces of everyone were clearly seen, these people were all teenagers, disciples who had entered the secret realm of trials, and at this moment they were sitting together, talking about their insights and gains in the past few days.

The moment the roar of the Thunder Swallowing Beast sounded, their hearts trembled, and their eyes showed a look of horror, the strength of the Thunder Swallowing Beast was too strong, which shocked their hearts.

"What's the matter, where did you get the roar of the beast!" a thick-eyed young man stood up, his vigilant gaze scanning the surroundings, his broad palm pressed against the hilt of the knife at his waist.

"Don't panic, this demon beast is still at least dozens of miles away from us, so it shouldn't be here!" said one of the young men with a pale face and a scholarly appearance.

The boys nodded in agreement, and one of them waved his palm and struck out a powerful breath to extinguish the bonfire, and the valley was dark again, only the extinguished bonfire still emitted the smell of burning grass and trees.

In the south, there was also a group of people, who stood at the entrance of the cave, looking in the direction of the thunder swallowing beast's roar, and one of them, a young man in a white robe, with a deep gaze, touched his smooth chin, and pondered.

"What kind of demon beast is this, it actually has such a strong strength?" Since Yun Fei left, Mu Tianxin has been staying in the cave to heal her injuries, although she has Ling'er's elixir to help, but she has been injured too badly, and if she wants to fully recover, I am afraid that it will take another day.

At this moment, she stood in front of the empty mouth and looked at the source of the voice, and the two one-word eyebrows couldn't help but raise slightly, thoughtfully, of course, the voice she heard was already weak, but even so, her soul was still turbulent.

The Thunder Swallowing Beast roared in the sky, Yun Fei was the closest, and the impact was also the greatest, and his soul was in sharp pain, as if it was about to be torn apart, and his mind was in a trance.

Yun Fei was terrifying, biting the tip of his tongue, forcing himself to wake up, he didn't dare to stay long, he hurriedly retreated, and forced back for more than ten miles before he stopped, and his back was cold and sweaty.

In his previous life, he had heard of the Thunder Swallowing Beast, and he had also seen a description of it in the Ten Thousand Beast Records, he only knew that its physical body was powerful and could break mountains and seas, but he didn't expect that it was also good at soul attacks.

Yun Fei sighed lowly, "It's better to believe in a book than to have no book." ”

It was only at this moment that he realized a truth, the records in the books are not necessarily true, and there will be omissions, and only with the spirit of critical inheritance can we get the essence and remove the dross.

"Roar!"

Another roar rang out, the thunder and lightning on the sky flickered more violently, the clouds were broken, and the cyan lightning was like a spiritual snake, flickering, spitting, and could be chopped down at any time.

Yun Fei, who had retreated more than ten miles, looked up at the sky, and at this time, the roar of the Thunder Devouring Beast could be said to have almost no effect on his divine soul impact, and could only cause a slight ripple.

"Click!"

The dark clouds cracked, the sky seemed to be torn open by a huge opening, and a cyan lightning bolt slashed down from the top of the firmament in a rage, slashing at the thunder-swallowing beast standing on the top of the mountain.

Not only did the Thunder Swallowing Beast not have a trace of fear, but its blood moon-like eyes were full of excitement, and I saw it raise its head and open its huge mouth of the blood basin, and there was an electric arc swimming on the scarlet snake's head.

"Poof!"

When the lightning did not enter the mouth, the huge mouth of the blood basin immediately closed, and a scream came from the top of the mountain, accompanied by the sound of the mountain stone breaking, and the scream made people's scalp tingle.

Yun Fei stood more than ten miles away, glanced at the sky that was still condensing thunder and lightning, pondered for a while, returned the same way, and flew towards the top of the mountain where the Thunder Devouring Beast was.

However, he didn't get too close, and stopped at a mountain that his senses could cover, and the pain of the Sky Eater rolling on the ground came to mind.

"This guy is really ruthless!" Yun Fei sighed from the bottom of his heart.

Thunder and lightning contain the power of heaven and earth, what in the world dares to do this, I am afraid that only this thunder-swallowing beast is it.

The Thunder Swallower fell to the ground in pain, rolling all over the ground, and wherever the giant tail went, the landslide cracked, and the top of the mountain below it was cut off, clearly visible, and the cyan thunder and lightning flickered on its body, destroying it.

The pieces of silver-white scale armor were suddenly scorched black, and the mountain wind blew, and the smell of burnt paste could be clearly smelled, and it was obvious that even if the Thunder Devouring Beast lived on thunder and lightning, it couldn't help but have cyan thunder and lightning raging in its body.

Looking at the painful Thunder Devouring Beast, Yun Fei thought for a moment, and he remembered what he had said to him in the mysterious space Qingchi.

"The Yin and Yang Quenching Technique can not only use the power of the five elements of heaven and earth to make it perfect, but also use the natural attributes between heaven and earth to cultivate the physical body, wind, rain, thunder, and electricity. ”

The words were still in his ears, when he heard Qingchi's words, to be honest, Yun Fei was a little suspicious, and he didn't dare to take it seriously, but now he saw the Thunder Devouring Beast devouring the cyan thunder and lightning with his own eyes, and he was touched.

After a moment, the Thunder Swallower stopped wailing, and although it was scorched black by the thunder and lightning, and a few pieces of scale armor had fallen off its body, there was a flash of excitement in its eyes.

Obviously, after devouring that cyan thunderbolt, it had gained great benefits.

"Could it be that this is the reason why the Thunder Devouring Beast's body is so strong?" Yun Fei muttered to himself, as he saw that where the scale armor had fallen off, new scale armor was growing, and at a very fast speed, the scale armor was growing.

The color of the newborn scale armor has become brighter, if the silver-white scale armor of the previous Thunder Swallowing Beast is pale white, then the newborn few scales are really silver-white, more dazzling than the moonlight.

The cyan thunderbolt returned in vain, which made it angry, and this was a challenge to its authority, and a cyan thunderbolt slashed down in anger than before.

The cyan pillar of light stretched through the sky and the earth, as thick as a bucket, shrouding the area of more than ten miles in a blue light, and the arc was swirling, looking like an angry dragon.

"Roar!"

The Thunder Swallower roared, and this time, instead of swallowing straight into its mouth, it swung its long silver tail and whipped at the lightning bolt that was slashing at it.

Although the roar of the Thunder Swallowing Beast shook Yun Fei's soul in unbearable pain, he didn't take a step back, he wanted to see with his own eyes how this Thunder Swallowing Beast cultivated his own physical body, which would be an inspiration for him, perhaps, this method of cultivating the physical body, he might be able to learn from it.

"Bang!"

The two collided, and the powerful qi wave turned the surrounding boulder into shock, and the attack of the Thunder Swallowing Beast could be said to be very timely, Rao was so, and there was still an arm-thick cyan lightning bombardment on its body.

After all, the cyan lightning carries the power of heaven and earth, and the power is extremely powerful, under the bombardment, the landslide cracks, the mountain is more than two feet deep, and the scorching smell comes, directly blasting the sky-swallowing beast into the deep pit, and the scorching smell spreads in the void, making people's stomachs uncomfortable for a while.