Xu Boxin's energy was concentrated in the Dan furnace, he closed his eyes and silently felt the various changes in the Dan furnace, the expression on his face was slightly solemn, and it seemed that he was quite nervous in his heart.

The impurities of the medicinal liquid in the Dan furnace have been exhausted, and they are splitting and merging at the moment, as if they are testing whether the two sides can be fused together? Because Xu Boxin has never refined the Little Barrier Breaking Pill, he can only judge the order of fusion based on his own experience.

At the beginning, everything seemed to be very smooth, and there was no problem with the continuous fusion of seven or eight kinds of medicinal liquids, when it was fused to the ninth group of medicinal liquids, the Dan furnace suddenly shook violently, and before Xu Boxin could react, he heard a loud noise, followed by the Dan furnace lid exploded into the sky.

At the critical moment, Xu Boxin used his aura to protect Liu Chengfeng's body to prevent him from being affected.

At this time, Xu Boxin's face was extremely ugly, as a human teacher, the first furnace of elixir that his apprentice entrusted him to refine actually blew up, which made him ashamed and angry.

"Uh, it's frying......" Liu Chengfeng blinked his eyes, a little helpless.

Xu Boxin also shook his head, muttering to himself: "What is the problem?" Biyu Grass, Snow Jade Ancient Ginseng, Kirin Fruit, Jade Bone Fruit, Qingyan Wood, Pei Hair Root, Cold Hair Branch, Dragon Blood Zhi, ......

Liu Chengfeng didn't speak, just looked at Xu Boxin quietly, because compared to his master, he really had no say in alchemy.

Xu Boxin pondered for a long time, and finally his eyes fell on Liu Chengfeng, and then frowned and said: "I think it should be like this, the Jade Bone Fruit and the Qilin Fruit will have a rejection reaction, so we have to try to fuse these two medicinal liquids together first, and then fuse other medicinal liquids, so as to ensure the chance of becoming a pill, what do you think?"

Liu Chengfeng just nodded. Following Xu Boxin's words: "As long as you think it's reasonable, then it's reasonable!"

"Well, let's try again!"

So, Xu Boxin reopened the furnace for alchemy and continued to repeat what happened before. It's just that at the level of fusing the medicinal liquid, Xu Boxin took the lead in fusing the medicinal liquid of the jade bone fruit and the medicinal liquid of the unicorn fruit with each other.

This fusion is naturally skillful. You can't use brute force, just like the positive and negative poles of a magnet, knowing that the two are incompatible, if you pinch them together, and when you let go of it, it separates, what's the point?

Xu Boxin has naturally encountered this situation, some medicinal liquids also have magnetic fields, as long as they find the right direction, they can naturally fuse the medicinal liquids together.

However. Just as Xu Bo was confidently exploring the magnetic fields of the two medicinal liquids, something unfortunate happened.

I only heard a loud "boom", and the Dan furnace exploded again. This time the furnace was even more ferocious than the last time, and the lid of the Dan furnace flew directly onto the ceiling of the alchemy room, and was deeply embedded in it, and a few rocks also fell......

Liu Chengfeng swallowed his saliva, looked at the gray-faced Xu Boxin, but thought silently in his heart. What is the problem, and why is it always unavoidable to fry?

Suddenly. Liu Chengfeng's eyes lit up, but when he saw the master's ugly face, he was a little hesitant and didn't dare to speak.

Seeing that Liu Chengfeng wanted to speak and stopped, Xu Boxin, who had a dark face, spoke: "What do you want to say? If you want to say it, just say it! I have been alchemy for hundreds of years, and it is not the first time that alchemy has failed......

The master spoke, and Liu Chengfeng hesitated slightly. Then he said cautiously: "Master, why don't you add a flavor medicine to it?" Just add six-winged royal jelly, this flavor medicine may be able to neutralize the rejection reaction of the jade bone fruit and the unicorn fruit......

"How do you know that Six-winged Royal Jelly can neutralize the rejection of these two flavors?" Xu Boxin raised his eyebrows and asked rhetorically.

Speaking of which, Liu Chengfeng was a little embarrassed. It was his negligence that led to the two fryers. Because in the game, six-winged royal jelly is not a valuable thing, and it can basically be obtained at any time, so when Liu Chengfeng talked about the recipe of the Little Barrier Breaking Pill, he directly ignored this worthless medicine.

The reason why I thought of the two fryers may be the lack of this inconspicuous medicine.

"Then try again......" Xu Boxin said, and began to re-select the medicinal materials, preparing to continue alchemy.

Another three days passed, and under the gaze of Liu Chengfeng and Xu Boxin, the medicinal liquid of the jade bone fruit and the unicorn fruit finally fused together. Seeing this scene, Xu Boxin showed a relieved smile on his face, and Liu Chengfeng was also full of excitement.

If these two herbs are fused together, then Cheng Dan will not have the slightest surprise.

Sure enough, when Xu Boxin received the pill, he didn't even have a single waste pill, and there were nine small barrier-breaking pills lying quietly in his palm, which made both of them extremely excited. And Liu Chengfeng was excited at the same time, but also a little remorseful. If it weren't for his own negligence, there should have been 27 small barrier breaking pills at this moment, right? Thinking of a medium-grade spirit stone with medicinal materials as high as five or six million, Liu Chengfeng couldn't forgive himself for his negligence.

"There are still seven or eight days to go, it's the big competition of the sect, the master will immediately refine the Dust Reduction Pill now, and then take it with the Little Barrier Breaking Pill, I hope to help you......" The Little Barrier Breaking Pill was refined, Xu Boxin didn't dare to delay at all, and he was ready to refine the Dust Reduction Pill.

"Thank you, Master......"

The Dust Reduction Pill is more valuable than the Little Barrier Breaking Pill, and each medicinal material is worth tens of millions of medium-grade spirit stones, so Xu Boxin is very careful.

Four days later, when the lid of the Dan furnace flew up, three purple pills suddenly flew into Xu Boxin's hands. Liu Chengfeng stood next to him and looked at it, and finally said excitedly: "That's right, this is the Dust Reduction Pill......"

It's exactly the same as in the game, and I don't know if the game world is connected to the fairy world?

Now, the Little Barrier Breaking Pill and the Dust Reduction Pill are available, and Liu Chengfeng is ready to take these two pills to improve his cultivation. For the sake of insurance, Xu Boxin deliberately asked Liu Chengfeng to practice in the Tianzi No. 1 Alchemy Room, and if there was any accident, he would also help in time.

Liu Chengfeng naturally did not object, sat cross-legged on the ground, and took one of the small barrier breaking pills and one dust reduction pill.

As soon as the two pills were in his mouth, Liu Chengfeng felt a heat and a cold slowly sinking towards the dantian. Among them, the hot one is the small barrier breaking pill, and the cold one is the dust reduction pill.

At the beginning, Liu Chengfeng did not feel uncomfortable, but had a sense of comfort in both ice and fire.

But after a while, when the cold and heat senses sank into the dantian, the small barrier breaking pill immediately took the upper hand, and the dantian seemed to be filled with a raging fire, and the burning willow Chengfeng was red all over his body, and he couldn't wait to jump into the cold pool water immediately.

"Quickly take the Huanglong Dan ......"

Xu Boxin, who was next to him, reminded him in time when he saw this scene.

At this time, Liu Chengfeng finally reacted and immediately poured a bottle of Huanglong Dan into his mouth. As soon as Huang Longdan entered the abdomen, he immediately turned into a huge aura and dispersed to the limbs, and Liu Chengfeng also hurriedly ran the "Sun True Fire Treasure Record", absorbing this huge aura.

Originally, Liu Chengfeng thought that it would take a while to absorb Huang Long Dan's aura, but as soon as he ran the exercises, Huang Long Dan's aura rushed towards the dantian, and that speed really made Liu Chengfeng a little dumbfounded.

Not only that, but a whirlpool gradually gathered above Liu Chengfeng's head, and this whirlpool turned faster and faster, absorbing all the aura within a radius of several miles, and filling Liu Chengfeng's dantian.

If it were usual, such a huge aura would have already burst Liu Chengfeng's dantian.

But now, Liu Chengfeng's dantian seems to have become a bottomless pit, absorbing as much aura as he has.

The dantian is getting hotter and hotter, and the aura absorbed is getting bigger and bigger, as if the dantian is a melting pot, as long as the aura enters the dantian, it will melt away. At the beginning, Liu Chengfeng only took Huanglong Dan bottle by bottle, and later, he took several bottles and bottles, and only in this way could he feel better.

The Dust Falling Pill also exuded bursts of coolness from time to time, suppressing the heat of the Little Barrier Breaking Pill.

In this way, Liu Chengfeng's realm began to climb, first the sixth layer of qi training, then the seventh layer, and then the eighth layer, and soon entered the peak of qi training......

Not only that, but his flesh was also strengthened, and his pores gradually oozed a trace of black impurities.

When Liu Chengfeng reached the ninth layer of Qi training, Huang Longdan was already a little useless, at this time, he hurriedly grabbed a medium-grade spirit stone in his hand, and then began to absorb the aura of the medium-grade spirit stone.

After a minute, the medium-grade spirit stone is turned into powder.

Then, Liu Chengfeng picked up a medium-grade spirit stone again, but it didn't take long for the medium-grade spirit stone to turn into powder again......

This situation only lasted for more than ten minutes, and Liu Chengfeng's realm broke through to the foundation building period. After reaching the foundation building period, when Liu Chengfeng absorbed the medium-grade spirit stone again, it was almost just a little more than ten seconds, and the spirit stone would turn into powder.

Because the aura could not be replenished, and an extremely hot whirlwind formed in the dantian, Liu Chengfeng was extremely uncomfortable. Now, only a higher-grade elixir or spirit stone can make Liu Chengfeng feel better.

As a last resort, Liu Chengfeng could only use both hands, grabbed a handful of medium-grade spirit stones, and quickly absorbed them.

And the whirlpool above Liu Chengfeng's head is also getting bigger and bigger, from the beginning of only absorbing a few miles of spiritual energy, to the last ten miles, dozens of miles, the momentum seems a little terrifying.

The early stage of foundation building, the middle stage of foundation building, and the late stage of foundation building......

After reaching the late stage of foundation building, Liu Chengfeng needed more aura, but only with the aura of the medium-grade spirit stone, it was really unable to satisfy the appetite of the dantian. At this time, Liu Chengfeng could only look at his master for help.

Since Liu Chengfeng couldn't speak, Xu Boxin could only understand the meaning of the apprentice from his eyes.

When Xu Boxin saw that every time Liu Chengfeng grabbed a handful of spirit stones, it turned into pieces in just an instant, he hurriedly searched for it from the storage bag, looking for it, Xu Boxin suddenly took out a bottle of elixir, and then handed it to Liu Chengfeng and said, "In vain...... This is an aiki pill suitable for Jindan stage monks, for your current cultivation, it may be a bit advanced, and I don't know if you can stand it?" )