Yun Tianyu refined the mid-grade Heavenly Artifact Jufeng Mountain and successfully broke through the realm, while Yuan Xiaoxi was unable to break through to the first-level Dao Sect realm after refining the Fire Turtle Soul.

After repeated attempts hundreds of times to completely fuse the power of the Fire Turtle Soul, Yuan Xiaoxi still did not succeed in breaking through the realm as he wished, which made the lovely Yuan Xiaoxi depressed.

"What's wrong with the creek, the breakthrough failed. Yun Tianyu, who had broken through to the second-level Dao Spirit realm, saw Yuan Xiaoxi wake up sullenly, guessed the reason, and asked softly.

"Well, after refining that stinky turtle soul, I didn't break through the realm, and if I couldn't reach the first-level Dao Sect realm, I wouldn't be able to defeat that old guy from Lei Dongtian at all. Yuan Xiaoxi said with a depressed face.

"Xiaoxi, if you really want revenge, I can help you, and I guarantee that you can destroy the entire Lei family. "During the conversation with Yuan Xiaoxi last night, Yun Tianyu knew that the Lei family was the first family in Lei Tiancheng, and it was also a cancer in Lei Tiancheng, and they were usually evil and lawless, and almost two-thirds of the residents of Lei Tiancheng had been harmed by the Lei family.

And the reason why the Lei family did all the bad things without scruples was that relying on the Lei family's family master, his own strength had reached the deterrent power of Lei Dongtian, who had reached the first-level Dao Saint realm, which made the masters of the entire Lei Tiancheng dare not speak out.

"Boss, you really have a way for me to destroy the entire Lei family. That Lei Dongtian is a first-level Dao Saint master, very powerful. Yuan Xiaoxi's bright big eyes projected a Dao essence light, and asked in surprise.

"Well, but although my method can help you defeat Lei Dongtian and destroy the entire Lei family, your body will be exposed, so Xiaoxi, you have to think about it carefully. Yun Tianyu nodded and said slowly.

"Boss, do you know what my body is?" Yuan Xiaoxi raised his eyebrows and asked with a shocked face.

"Well, I not only know what your body is, but also know that on the night of the fifteenth full moon, your own strength is the strongest, if you take a whole bottle of potential potion that I helped you refine at that time, you will become the Blood Pupil Demon Ape body, greatly increase your strength, and by the time zone, the first-level Dao Saint master will not be your opponent at all. Yun Tianyu nodded and said frankly.

"It's worthy of the boss I recognize, and even my body knows it!, but boss, is this method you said really feasible?" Yuan Xiaoxi, who was a little shocked in his heart, blinked his eyes and asked softly.

"Don't worry, Xiaoxi, I won't lie to you, and this is the only way to get revenge at the moment, think about it. Yun Tianyu said with a faint smile.

"Boss, I believe in you, in order to take revenge, and for those who were killed by the scourge of the Lei family, I decided to follow the method you said, and go to the Lei family on the night of the full moon of the fifteenth month to take revenge. Yuan Xiaoxi took a deep breath and decided to try the method Yun Tianyu said to take revenge.

"By the way, boss, don't you say that there are treasures in this valley, I don't know what treasures you have got?" asked the lovely Yuan Xiaoxi with a curious expression.

"Okay, I'll show you. Yun Tianyu's mind moved, and he sacrificed the middle-grade heavenly weapon Jufeng Mountain that he had refined.

"Boss, this is the treasure you said, I think it looks like a brick to build a house, it's really ugly!" Yuan Xiaoxi's eyes widened, looking at the rectangular red brick in Yun Tianyu's hand, and said in surprise.

"Xiaoxi, don't underestimate this brick, it's not a small power, you can see it. Yun Tianyu smiled slightly, and controlled the two spirit elements in his body to merge into the mid-grade Heavenly Weapon Giant Peak Mountain.

Suddenly, a terrifying aura poured out in the giant peak mountain, and the form of the red brick changed instantly, turning into a mini mountain, which landed in the far open space under the control of Yun Tianyu's mind.

"Boom!", when the giant peak that changed into a mini mountain descended, the ground that was hit immediately collapsed ten meters, and a large number of cracks spread rapidly to all sides under the violent shaking of the giant peak mountain.

"So powerful, boss, you really have a vision. Yuan Xiaoxi was obviously shocked by the destructive power generated by the descending of the Giant Peak Mountain, his eyes widened, and he said with a look of surprise.

"Now my strength is too weak to exert the true power of Giant Peak Mountain, but even so, Giant Peak Mountain is enough to kill ordinary low-level Dao Sect masters. Yun Tianyu's mind moved, and he controlled Jufeng Mountain to return to the form of a brick, and slowly landed in his hands, and said lightly.

"Boss, can you help me get a treasure of this kind in the future? Yuan Xiaoxi saw the power of Jufeng Mountain and asked with envy.

"That's fine, as long as you're always with me, I'll promise to help you get a treasure of this power. Yun Tianyu nodded and reassured.

"Boss, as long as you don't drive me away, I will follow you in the future. Although Yun Tianyu's strength is far inferior to his own, Yun Tianyu can see through his own body, can refine potential potions, and discover powerful treasures, which makes the smart Yuan Xiaoxi decide to follow Yun Tianyu's side.

"Boy, I didn't expect you to have a hand to tie the Blood Pupil Demon Ape to your side so easily. The Great Demon King sensed Yun Tianyu's means of encircling Yuan Xiaoxi, and praised him.

"The reason why I kept Xiaoxi by my side is that in addition to Xiaoxi's strong combat power, more importantly, Xiaoxi makes me feel like a younger sister. ”

"By the way, the Great Demon King, now that I have successfully refined the Medium-grade Heavenly Artifact Giant Peak Mountain, don't you say that there is a good place to tell me, I don't know if I can say it now?" Yun Tianyu asked in his heart.

"Tianyu, you try to attack with Giant Peak Mountain, I feel that there is a cave behind the mountain wall. ”

"There's a cave behind the mountain wall, okay, I'll try it. Yun Tianyu glanced at the mirror-like mountain wall behind Yuan Xiaoxi with some surprise, and nodded.

"Brook, come to me. Yun Tianyu softly beckoned Yuan Xiaoxi to come to his side.

"Well, good. Yuan Xiaoxi nodded, and came to Yun Tianyu's side obediently.

"Giant Peak, hit me. "After sacrificing the Giant Peak Mountain, Yun Tianyu poured two spirit elements into the Giant Peak Mountain, and the Giant Peak Mountain, which controlled the changing form, slammed into the smooth mountain wall.

"Boom!", the smooth mountain wall was hit by the Medium-grade Heavenly Artifact Giant Peak Mountain, and a large hole was immediately broken, and a dark aura emanated from the black hole.

"Boss, you are so powerful, how did you find out that there is a hole in this mountain wall. Yuan Xiaoxi looked at Yun Tianyu, who had repeatedly surprised her with admiration, and said excitedly.

"Let's go in the stream, let's go in and have a look, see what's inside?" Yun Tianyu smiled mysteriously, didn't explain anything, and took Yuan Xiaoxi into the pitch-black hole.

Walking into the black hole, Yun Tianyu and Yuan Xiaoxi felt that the temperature of the black hole was very low, and dark forces continued to pour out in the black hole.

In order to guard against a crisis that may arise at any time, Yun Tianyu took out a moonstone from the Razor ring, reflected the entire black hole, and walked carefully along the winding cave towards the end of the cave.

Yun Tianyu and Yuan Xiaoxi walked slowly for a long time, walked to the end of the cave, and found a skeleton sitting cross-legged at the end of the cave, and in the head of this skeleton, a fresh brain was wriggling.

"Great Demon King, do you know what that fresh brain is?" Yun Tianyu looked at the strange fresh brain in the white skull's head, did not blindly approach, and asked softly.

"Well, that brain is a little weird, I haven't seen it before, but that brain can exist on its own, it shouldn't be a mortal thing, Tianyu, you use the moon double wheel to attack that brain, and see how that brain reacts. The Great Demon King pondered for a moment, and then Chuan Yin proposed.

"Okay!" Yun Tianyu nodded, took out the best spirit weapon Yueyue Twin Wheel from the Razor Ring, and threw it at the Fresh Brain with great force.

"Click!" The white skeleton was immediately shattered by the Yueyue Twin Wheels' attack, but the fresh brain was not affected by the Yueyue Twin Wheels' attack, and easily rebounded the supreme spiritual weapon Yueyue Twin Wheels.

Bounced back to the Yueyue Twin Wheels, the attacked mysterious brain squirmed violently, and approached Yun Tianyu and Yuan Xiaoxi at an extremely fast speed.

"Tianyu, don't let this brain get close to you, give me a drop of your essence blood, and then you and the little girl get out of here quickly, and I'll find a way to subdue it. Sensing that the mysterious brain was in danger, the Great Demon King urged loudly.

"Creek, this brain is in danger, let's get out of here. Yun Tianyu did not hesitate, grabbed Yuan Xiaoxi's arm, who also sensed the crisis, took back the moonstone that reflected the cave, and pulled Yuan Xiaoxi out of the mysterious cave quickly.

When Yun Tianyu and Yuan Xiaoxi left quickly, the Great Demon King appeared in the dark cave, blocking the mysterious brain, and in the palm of the Great Demon King's hand, he held a drop of essence blood left by Yun Tianyu before leaving.

Sensing the sudden appearance of the Great Demon King, the mysterious brain with extremely strong spiritual intelligence immediately released a strange power to attack the Great Demon King's soul.

Attacked by the strange power released by the mysterious brain, the Great Demon King was not affected at all, and spewed out a mouthful of hot black flames, enveloping the mysterious brain.

Wrapped in the black flames spewed by the Great Demon King, the mysterious brain squirmed violently, struggling desperately.

However, although the Great Demon King can only spew out black flames, the Great Demon King's control over the flames is extremely strong, and every time the mysterious brain wants to struggle out, he is forced back by the Black Flame controlled by the Great Demon King.

After several struggles, the mysterious brain suddenly contracted highly to resist the attack of the black flames.

"It's pretty tenacious, I'll see how long you can hold out. "The Great Demon King didn't care about the mysterious brain's choice of defensive tactics, and continued to release black flames to attack the mysterious brain.

After about three hours, the mysterious brain finally couldn't resist the black flame attack released by the Great Demon King, and the black flame penetrated into the brain.

The Great Demon King seized this opportunity and decisively fused Yun Tianyu's essence and blood into the mysterious brain, and forcibly forced the mysterious brain to recognize Yun Tianyu as the master.

And the moment the mysterious brain was recognized by Yun Tianyu's essence blood, the information of the mysterious brain suddenly appeared in Yun Tianyu's mind, who had already escaped from the mysterious black hole, and learned that this mysterious brain was a soul erosion brain that could erode and control the consciousness of people's brains.