Half a month later, due to the continuous killing of a large number of demon clans, Li Fei and others obtained countless magic cores, mainly at the level of the demon king, and hundreds of demon masters! However, Li Fei and others were all injured and consumed extremely severely. If Li had not provided a large amount of elixir support, they would have been unable to withstand it.

Later, perhaps because of the fear of killing that demon clan, or for other reasons, Li Fei and others finally escaped from the pursuit area and came to a relatively calm area. There was no powerful demon clan within a radius of hundreds of thousands of miles. Everyone decided to take a good rest.

After half a month, everyone recovered completely. Li Fei thought for a moment, took out the top-grade Wangjie Dan and handed it to everyone, allowing everyone to try to make breakthroughs on the spot.

Mi Fan excitedly took over Wang Jiedan and said with some concern: "We break through here. If we attract a powerful demon clan, it would be terrible."

Li Fei said: "Because we have been lost all the way, and judging from the strength of the demonic energy, I think we must have gone deeper. If we don't have enough strength, it will be difficult to get out, so we can only take a chance."

Although everyone felt that it was dangerous to break through here, they thought Li Fei was right, because in the battles these days, they felt that their own strength was serious. If Li Fei had not shown his might, they would have been completely wiped out long ago.

After some preparation, everyone set up a huge formation within thousands of miles to cover up the movements that might be caused by the breakthrough. Then Xiang Cheng and others began to surrender Wang Jiedan to break through, while Li Fei found a small valley to study the secret of the magic core.

Because Li Fei communicated too little with the monks in Baisha City and was not clear about the use of the magic core, he ended up struggling for a while but still couldn't figure out how to use it.

Since Huaer had just broken through the realm and did not need to break through the bottleneck, she saw Li Fei studying the magic core and seemed to want to directly use the energy of the magic core, so she came to him and sat down and smiled: "Brother Fei, the energy of the magic core is very powerful, and even the magic core is much more powerful. It is very useful. It can be used to refine weapons, set up arrays, etc., but it cannot be absorbed directly."

Seeing that every frown and smile of flowers exuded endless charm, Li Fei immediately woke up somewhere in his body, and smiled awkwardly, "Baby, you should return to your original appearance, otherwise it would be very hard for me to get along with you like this!"

Huaer covered her mouth and smiled, her devilish body trembled slightly, stimulating Li Fei's nerves even more strongly, and at the same time she said coquettishly: "Why do you have to endure it? Haven't you thought about it long ago..."

Li Fei roared lowly, set up a shielding restriction, hugged the flower in his arms, blocked her cherry mouth with his big mouth, and his hands were proficient in exploring one secret place after another. The two of them quickly entered the world of infinite happiness...

After a long time, even Xiang Cheng and others survived the most dangerous moment of movement, Li Fei and Huaer slowly stopped their extremely happy "dual cultivation" journey.

When Li Fei was about to ask the secret of the magic core, Huaer was still immersed in happiness and murmured with some smugness: "Now Yue'er should call me sister, because she hasn't gotten to Brother Fei yet..."

Li Fei, who was very troubled, almost had to "fight" with her again, but considering the dangerous environment, he didn't want to waste his time anymore, so he kissed gently and asked: "Huaer, what does it mean that you just said that you can't use the magic core directly? That is to say, it's possible that you can use it directly? It's just that there are some restrictions, right?"

Huaer leaned into Li Fei's arms and replied casually: "The essence of the magic core is very strong, but it is very domineering. Unless you advance to the realm stage, use the power of the domain to slowly purify it, and then enter the realm to absorb a little bit directly, and most of it will be wasted, and even not as good as the normal cultivation speed. Otherwise, the 'world' will be demonized and the monk will become a demon."

Without saying a word, Li Fei released a green barrier and decided to try it. He did not dare to test the Demon Lord's magic core, but took out a Demon King's early stage magic core for experiments.

The child's fist-sized magic core floated in the green barrier, and countless green silks were wrapped around, trying to eliminate the strong demonic energy and leave pure energy.

But unfortunately, after most of the hour, the energy of the magic core was almost consumed, and there were even cracks on the magic core, and there were still no signs of purification, which means that Li Fei failed.

Huaer seemed to have known this result for a long time, and said indifferently: "Brother Fei doesn't need to try it. If it can be used, so many seniors in the past will have already been here. How can they work hard to practice a little bit? The cultivation level is more than a thousand miles a day!"

Li Fei smiled bitterly and said, "I haven't tried it before. I want to check it myself. It seems that I am no exception. It is impossible to take a shortcut... Hey, the green silk seems to have automatically absorbed a little!"

"What? Have you absorbed some? Brother Fei, hurry up and check the 'world'. Whether it has been polluted. This is a big deal!" Huaer jumped up in fear and looked at Li Fei with a nervous look on his face, his eyes full of fear.

Li Fei originally thought it was no big deal, but seeing Huaer was so nervous, he suddenly became nervous. He hurriedly looked inside, but found that there was nothing abnormal in the "world" in his body. He was worried that he checked it repeatedly many times and confirmed that there was indeed no problem, so he breathed a sigh of relief.

Seeing that Li Fei finally opened his eyes, Huaer almost cried: "Brother Fei, how about it? Can it be suppressed? Don't be anxious. Although the demonic energy is very powerful, as long as it is not polluted, it can still be suppressed slowly..."

Li Fei smiled happily and said, "Don't be nervous. Although I clearly felt that I had absorbed a little, there was no demonic energy in my body! The absorbed one has been completely transformed into pure vitality!"

Huaer was stunned: "No way? You are in the middle stage of the realm, how could you be more powerful than the strong people in the Transformation Realm? Even the super strong people in the late stage of the Transformation Realm cannot be done at all! Unless you are a peerless strong person at a higher level, there are some possibilities."

Li Fei shook his head and said, "I don't know the specific reason. Maybe it has something to do with my martial arts. After all, 'Crazy Saint Tianshui' comes from the underworld in a higher world. It is a little more powerful, and it is understandable."

Huaer swallowed her saliva and said excitedly: "Did you say, too, I can?"

Li Fei said seriously: "This is not certain yet, but for the sake of caution, you should not try it rashly, at least wait until I have thoroughly studied it."

After all, Huaer knew the power of the magic core, so she quickly calmed down, nodded vigorously, and said seriously: "I won't try it casually. I will only give it a try unless I'm sure there is no danger."

Li Fei nodded and took out a magic core from the early stage of the Demon King again, absorbed it with only a small amount of green silk, and closely monitored all changes in his body. As a result, he found that as before, there was no problem, so he became bolder and released more green silk.

After an hour, Li Fei had absorbed all the power of this magic core, and his cultivation level increased significantly, and he still had no discomfort.

The next step is simple. After Li Fei tried several magic cores in the early stage of the Demon King, he began to test the magic core in the middle stage of the Demon King. After confirming that there was still no problem, then the magic core in the late stage of the Demon King.

A day later, Li Fei confirmed that all the demon cores at the level of the demon king could be absorbed with confidence. He did not rush to try the demon Lord level magic core immediately, but began to absorb the demon king level magic cores in large quantities, and his cultivation level was rising little by little at a visible speed!

During the process of absorbing the demon king-level magic core, Li Fei found that if he absorbed all the demon king-level magic cores at a time, at most about thirty. If there were more, the demonic energy would remain very small in his body and it would take a while to digest it.

A month later, Li Fei used up thousands of magic cores and almost used up all his inventory. His cultivation level was growing so fast that he could be described as a rocket. From the level of advanced to the mid-stage level, he rushed directly to the peak of the mid-stage level!

If it weren't for the lack of insight, Li Fei could directly hit the bottleneck! If he said it, he would definitely scare countless cultivators to death! What even the powerful people in the Transformation Realm stage could not do, Li Fei, a cultivator in the mid-stage Realm stage, could easily do it.

Seeing Li Fei's cultivation level soaring, Huaer said with envy at the same time: "Brother Fei, at your cultivation speed, those old monsters will definitely be pissed to death if they know about it! It's a completely despicable rhythm!"

Seeing the envious expression of Huaer, Li Fei felt aroused and suggested: "Don't you also want to improve quickly? Although you dare not absorb it directly, I can purify it first and then transfer it to you, which is equivalent to giving you a slower 'infusion'!"

Huaer was overjoyed and said, "It's okay? Then try it quickly!... But you must be slower at the beginning, I'm afraid I can't bear it. After all, not only is I not as powerful as yours, but I also absorb less 'Hua Sheng Tianshui'."

"Of course, I will take it slowly." Li Fei said, and began to purify the magic core, and then carefully passed a trace of pure magic core energy to Huaer.

Hua'er just advanced to the early stage of the world. Compared with Li Fei, she is far behind her. It's just a magic core in the late stage of the Demon King, which has increased her cultivation level!

More than ten days later, she used about a hundred demon cores at the level of the demon king, and Hua'er's cultivation level actually reached the peak of the early stage of the realm! She was so excited that she didn't even care about shyness, and took the initiative to come to Li Fei for a relatively short "dual cultivation" to express her gratitude...

Li Fei was embarrassed. It was obviously a "righteous" right, so he felt a "trading" smell... But then again, he felt that this feeling was very special and fulfilling...

Then, Li Fei began to test the magic core of the early stage of the Demon Lord, but unfortunately found that he had only absorbed a little bit and took a few days to completely refine it to eliminate the threat. He never dared to try it again, so he gave up.

In fact, this is easy to understand. The difference between the Demon Lord and the Demon Lord is too big. The "demon seeds" and qualities contained in the Demon Core have already taken a qualitative leap. Not to mention that Li Fei is only in the middle stage of the Realm Generation, even if he reaches the late stage of the Realm Generation, he may not be able to absorb the Demon Lord's Demon Lord's Demon core at will unless there are other major breakthroughs.

A few days later, Xiang Cheng and others had basically stabilized their realm. Let's discuss the next action together. Now their strength has increased and they have a hundred times more confidence! It is worth mentioning that Xiaohuo, Xiaobing and Jingtong are not sure why, they all used more than five top-grade Wangjie Dan to succeed, and others succeeded in one go.

However, when they found out that Li Fei and Huaer had reached the peak of the middle stage of Realm and early stage of Realm in just over a month, they were shocked and speechless.

Li Fei explained briefly, and everyone showed an expression of ecstasy. It turned out that they were eager to leave and they put away their thoughts, determined to collect as many magic cores as possible so that after the realm was stable, they could quickly increase their cultivation level!
Chapter completed!