The sky is dark and the earth is dark, and such a vision will be abnormal for those who have a heart, but most people still ignore this vision.

Inside Chu Feng's house, there were formation failures one after another, boiling with energy that was invisible to the naked eye, converging in the night sky. Gradually, the dark clouds of the night, as black as a sponge soaked in ink, will be sprinkled with ink all over the sky and stain the earth black for thousands of miles.

Unconsciously, on the back mountain of the Nine Demon Sect, the dark clouds that have existed for many years have also been fused with the dark clouds formed by these formations, and the dark clouds on the back mountain have thunder flickering, and the dazzling thunder pours into the dark clouds formed by the formation energy, causing the dark clouds to tremble, and the dark clouds in the entire night sky have trembled slightly, and the dark clouds formed by the thunder drilling into the formation are gradually rising.

Rumble!

Houshan slashed down a thunderbolt again, hitting Lin Dao Gully, he had also suffered two thunder blows before, but he felt a stinging pain in his flesh, and there was not much damage, but this time he was staring wide-eyed, the power of the thunder was unexpectedly amazing, and the explosion made his black hair stand up all over his head, and the corners of his mouth oozed blood.

"How did Thunder become stronger?"

Lin Daoyu's heart was shocked, and when he looked up at the night sky above his head, he always felt that the dark clouds above his head had changed, but he didn't know where to start.

Lin Dao was full of doubts, and entered the cultivation state again, and in the next time, the thunder that fell from the dark clouds in the back mountain gradually increased, and the power became more and more powerful, causing several disciples to fall headlong and be sent for treatment by other disciples.

As for Chu Feng, he was still studying the human-level formation, and the formation he started to study this time was still a killing formation.

After more than an hour of cultivation, Chu Feng had already arranged no less than ten formations, all of which ended in failure, but his understanding of human-level formations became more and more profound, and he felt that he was not far from successfully arranging human-level formations.

"Go on."

Chu Feng was not discouraged, anyway, the arrangement of the formation would not cause drastic changes like alchemy, he was very relieved to learn the formation, and the technique gradually became proficient.

Another hour passed, Chu Feng had already refined more than twenty human-level killing formations, although he was not successful, but the process of controlling the spirit gathering was getting longer and longer, and in addition to controlling the process of gathering the spirit, in terms of arranging the formation eye, he had basically reached a very mature point, and he would rarely fail here.

Being able to reach such a point in just one day, Chu Feng's formation talent can be imagined, it is quite powerful, although a large part of it is due to his high-level soul power, but it must not be otherwise, his talent in the direction of formation is probably no less than alchemy.

Chu Feng had just not been in contact with the formation before, but now he had opened another door.

During this period, a faint gas continued to float out of Chu Feng's house, converging on the heavenly dome of the Nine Demon Sect, and that dark cloud almost covered the entire Nine Demon Sect, if it was not at night but during the day, it would definitely cause the entire sect to tremble.

However, at night now, although the moon and stars have disappeared, such nights often occur, and the people of the Nine Demon Sect do not pay too much attention to it and continue to do what they are doing.

At this moment, in the back mountain of the Nine Demon Sect, those disciples who were punished by the five elders were all slashed into smoke, and the entire back mountain crackled with thunder, as dense as rain, and the group of disciples were afraid.

Even the disciple of the Supreme Realm was injured a lot by the bombardment, and he could still hold on, but the others couldn't hold it anymore.

Finally, someone couldn't help but run to find the Five Elders, but they were scolded back by the Five Elders, who thought that this group of disciples was making excuses and ignored them.

The five elders didn't let them leave, and this group of disciples naturally didn't dare to leave without permission, so they could only continue to hide in the back mountain, and finally had no choice but to gather together to fight against the terrible thunder, so that they could temporarily stay safe.

"It's going to work."

At this time, Chu Feng let out a laugh in the house, his eyes flashed with essence, and the human-level formation in his hand gradually stepped towards success, just the last moment.

Boom!

As a result, as soon as Chu Feng's laughter sounded, the formation in his hand exploded, and he was extremely depressed, so he could only start again.

One after another, Chu Feng didn't know why this time, the killing formation always failed, he was a very stubborn person, and he felt that the mortal-level formation could open a breakthrough from the killing formation, and the human-level formation would definitely be able to do it.

After dozens of failures, the human-level killing array in Chu Feng's hands was finally formed.

"Haha, I knew it would work."

Chu Feng laughed loudly, the joy of always failing and suddenly succeeding in the end was indescribable, especially when his whole heart was immersed in the formation.

Chu Feng was full of joy and released his soul power to form this killing array, this killing array is called "Nine Thunder Killing", it is a killing array containing the power of thunder, and the layout process is to absorb the thunder energy in the heaven and earth, gather it into this killing array, and step into the killing array, you will be killed by the thunder formed by the formation.

Chu Feng planned to try the power of this killing formation, flying out of the house and standing in mid-air, he didn't want to attract the attention of others, so he controlled the formation within a range of tens of meters, and then let go of his hands and feet to activate this formation.

Rumble!

This killing array was activated instantly, and when Chu Feng just wanted to mobilize the thunder power of the killing array to see how powerful it was, the thunder power in this killing array suddenly became uncontrollable, flew out of the killing array and rushed into the sky, blasting into a large area of dark clouds.

This dark cloud was the formation energy that failed to blow up when Chu Feng arranged the formation just now, because he controlled the process of gathering spirits, and the formation changed when absorbing the energy of heaven and earth, so it did not disperse in the sky for a long time, forming a dark cloud.

Later, this dark cloud blended with the dark clouds of the back mountain of the Nine Demon Sect, contaminated with some thunder attributes, and at this moment, the thunder power of Chu Feng's killing array was sucked away by the dark clouds, and there was an immediate chain reaction.

The night sky of the entire Nine Demon Sect suddenly exploded with a roar, and the sound of thunder became more and more deafening, looking up at the sky, countless thunderbolts were flickering, and the thunder on the back mountain was also sucked, frantically devouring the thunder energy in the dark clouds, and the thunder breath emitted continued to rise, gradually reaching a very terrifying level.

"This ...... What's going on? ”

Chu Feng was suppressed by the sudden change, he didn't understand why the killing array in his hand, the power of the thunder inside was suddenly sucked away, and then countless thunderbolts appeared in the sky, like dragons circling.

There was a thunderbolt in the sky, and then there was an eerie dead silence, and just when people thought the thunder would disappear, the sky suddenly changed color.

The purple light in the sky was overwhelming, and the thunder in the dark clouds slammed down on the earth, and the entire Nine Demon Sect was within the attack range of the thunder.

Boom Boom!

The thunder carries the power of destroying the world and the earth, splitting the chickens and dogs of the Nine Demon Sect to jump, and the power of each thunder is terrifying, among which the thunder of the back mountain is the most shocking, Lin Daoqi and others were bombarded into black charcoal, in order to escape, even if they disobeyed the orders of the five elders, they also escaped from the back mountain.

They thought they would be safe when they escaped from the back mountain, but they saw a scene they will never forget.

I saw that at this moment of night, endless thunder will fall, and the entire Nine Demon Sect will be covered by thunder, and one after another thunder will fall from the sky, destroying a large number of mountains and houses in the Nine Demon Sect, and the defensive formations will be triggered, and they will also be crumbling under the bombardment of thunder.

Chu Feng panicked, he knew that this matter must have something to do with him, in order to get rid of suspicion, he bumped into the thunder head-on, with his physical body, these thunderbolts at most made him slightly injured, he took this opportunity to smear a large amount of black soil on his face, pretended to be seriously injured and hid in the ground, and took out the bronze ancient bell to cover himself.

Chu Feng hid underground for the time being, waited until the crisis was resolved, and then hid the bronze ancient bell and pretended to be innocent.

"Hopefully they didn't notice."

Chu Feng hid inside the bronze ancient bell and kept praying, this accident was even more serious than in the Demon Sect at the beginning, he just blew up a mountain at the beginning, but now the entire Nine Demon Sect is within the attack range, destroying countless things, he doesn't dare to imagine the consequences of being known the truth.

"I just set up the formation, and something happened."

Chu Feng felt innocent, he had just arranged the mortal-level formation, and it was obviously fine......

"Wait!"

Chu Feng suddenly thought that just now, when he was arranging the mortal-level formation, an explosion suddenly sounded outside, and then Lin Daoqi and the others seemed to go crazy, could this matter also have something to do with him?

Chu Feng opened his mouth, if this was really the case, then he had to hide the facts, otherwise Lin Daoqi and the others would definitely kill him.

Just now, that group of disciples lost face, and it will definitely become a big joke in the Nine Demon Sect in the future, and they must have hated the culprit in their hearts.

"Ahhh......h

The disciples of the Nine Demon Sect were blown around, and many disciples wanted to escape from the Nine Demon Sect, but they were struck by thunder in mid-air and fell to the ground.

It can be seen that the disciples in the sky who were planning to flee for their lives fell from the sky one by one like dumplings.

"Bold, which demon is making trouble?"

Such a serious chaos quickly aroused the vigilance of the five elders of the Nine Demon Sect, such as the outbreak of a great battle in the Demon Abyss today, and several elders of the Nine Demon Sect used to sit in the town, so most of the affairs of the Nine Demon Sect were handled by him.

The five elders flew in the air, and when they saw the Nine Demon Sect in disarray, their hearts were dripping blood, and the entire Nine Demon Sect was blown into ruins, and the losses suffered were unimaginable.

The Fifth Elder couldn't care about his distress, he quickly burst out with terrifying coercion, blasting away the dark clouds in the sky, scattering the thunder in the sky, and as the dark clouds and thunder dissipated, the Nine Demon Sect slowly calmed down from the chaos.

The frightened disciples of the Nine Demon Sect were still in a state of panic, and they saw that there were many disciples with low strength lying on the ground, one by one, who were out of breath and in little, and their injuries were obviously very serious.

The five elders quickly organized manpower to treat the disciples, and then he rushed to the sky with endless anger, releasing his divine thoughts to find out the murderer, only to find that there was no strong breath near the Nine Demon Sect.

At this time, Chu Feng had already put away the bronze ancient bell, fell to the ground and pretended to be dead, and was mistaken for a serious injury by the disciples of the Nine Demon Sect, and helped him down for treatment.

Just when Chu Feng thought he had escaped, Lin Daoqi, who was so slashed that he couldn't see his face clearly, flew in front of the five elders, wiped the dust off his face, and shouted loudly.

"Fifth Elder, all of this was done by Yang Yun, and it was the vision caused by his arrangement of the formation!"

Lin Daoyu's hatred for Yang Yun was as deep as the sea, and he couldn't wait to swallow Yang Yun in one gulp.

Just now, a few friends of Lin Daoyan told him the truth, so he knew that it was Yang Yun who arranged the formation to form colorful clouds, and at this moment, it was the dark clouds in the sky that caused the change, and he instantly thought of Yang Yun.

It must have been Yang Yun who knew about their plan, so he deliberately used the formation to cause the vision of heaven and earth, and he was taking revenge on the disciples of the Nine Demon Sect.