"What, Senior Brother Lu, the exercises for refining mana?" Liu Feng looked at Lu Xu in front of him with a strange expression, and said in surprise.

"Yes, Senior Brother Chen, Junior Brother Hua Lingshi bought a few Qi Refining Pills a few days ago, and after taking it, he found that the mana in his body was a little mixed. Lu Xu said with a frown. Ever since he came out of the alchemy room, he had been plagued by this problem, and he didn't immediately take the pill to cultivate. After thinking about it and being upset, he had to come to Liu Feng to ask if there was a solution.

"Hehe, Senior Brother Lu, you think about it too much, mana is not a problem, almost every disciple in the Qi refining period has this problem, everyone has not enough time to cultivate, how can they have time to purify mana. Liu Feng said with a look of "you are rare and strange".

"Hehe, this junior brother knows, but I want to lay a solid foundation, does the senior brother know how to have this kind of exercise. Lu Xu smiled slightly.

"Oh, I see, but it doesn't matter if the foundation of our Qi refining period cultivators is strong or not. But since Senior Brother Lu needs it, I have one here. Liu Feng chattered a few words in puzzlement, took out a black cheatbook from the storage bag and handed it over.

Lu Xu took the cheats, and saw that there were three bright red characters written on the cover, "Tempering Formula", and then looked through it carefully. At first glance, I couldn't help but feel a burst of ecstasy in my heart, this refining recipe is not a cultivation method, it is all about how to refine and purify mana.

"Senior Brother Chen, I don't know if this refining recipe can be copied by the junior brother, and how many spirit stones are needed, you just have to say. ”

"Hehe, no need, Senior Brother Lu, this refining recipe will be given to you. Hearing this, Liu Feng waved his hand and said boldly.

"How can this work?" Lu Xu patted the storage bag and took out the bag containing the spirit stones.

"It's okay, I really don't need it, in fact, this refining technique is not a precious thing, many people in the sect have it. That is, only the monks in the late stage of the Qi refining period who fail to build the foundation will go to cultivate, which is a chicken rib for those of us who have no time to build the foundation. Liu Feng shook his head and smiled bitterly.

In fact, this refining recipe is also a strange book in the Zixiao Sect. It was created by a senior master in the sect for Qi refining stage cultivators with unstable foundations, which can greatly increase the chances of success in foundation building.

At first, everyone rushed to practice, but after cultivating, they found that this refining technique could indeed purify the mana and strengthen the foundation. But there is a fatal problem, that is, after purifying the mana, the cultivation will be greatly reduced, and if you want to restore the original cultivation, you must cultivate again. After repeating like this, the mana was refined, but the speed of cultivation was several times slower than before.

In this immortal cultivation realm where the cultivation speed is equal to life, this defect is almost fatal, and no one will cultivate the refining technique anymore. Only those monks who fail to build a foundation because of an unstable foundation will spend a lot of time cultivating, but there is an unwritten rule in the immortal cultivation world, if a Qi refining stage cultivator can't build a foundation before the age of thirty, then it is almost impossible to succeed in his life. At this time, it is too late to cultivate the refining technique.

"Then thank you, Senior Brother Liu. Lu Xu said gratefully.

Back in the Surabaya Medicine Garden, Lu Xu immediately activated the prohibition in the medicine garden, sat cross-legged on the futon, and then patted the storage bag, took out a pill of Guling Pill and took it orally, and then began to dissolve the medicinal power!

The medicinal power of the solid elixir was very fast, and after just half an hour, Lu Xu felt that a fire began to burn more and more in the dantian, but other places such as limbs were extremely cold, forming a very distinct feeling of ice and fire!

But this feeling only lasted for a short time, and the fire in the dantian suddenly disappeared without a trace, and the limbs and other parts also returned to normal temperature. This made Lu Xu a little stunned.

The puzzled look on Lu Xu's face flashed, and his face suddenly changed greatly, and he pressed his hands on the dantian and refused to let go of half an inch.

Because here, there was a sudden sharp pain like the stirring of a meat grinder. This made the defenseless Lu Xu's face extremely pale, and beads of sweat the size of soybeans kept falling down his jaw. The whole body is completely bent into a bow!

Lu Xu curled up on the ground in pain, and at the same time he was shocked in his heart, could it be that this solid spirit pill was poisonous.

But before Lu Xu could react, this sharp pain in the dantian suddenly erupted.

This explosion turned into countless heat streams, which immediately spread throughout the body along the meridians, and even penetrated deep into the bone marrow. But then, the heat immediately turned into a trickle of water that flowed through his body, and it felt as if countless ants were crawling all over his body, making him want to bang his head against the corner of the wall so that he could relieve the pain a little!

This kind of almost tortured Lu Xu madly, and I don't know how long it took before it gradually subsided. At this time, Lu Xu was able to hold on to the corner of the wall and barely stood up.

But Lu Xu didn't seem to notice all this, because he was surprised to find that his mana had improved a lot at once, and his whole body was warm, and there was no discomfort.

Obviously, the medicinal power of the solid elixir just now has dissolved, and the warmth on his body should be that the medicinal power of the elixir is spread throughout his body, and Lu Xu immediately crossed his knees and began to absorb these residual medicinal powers!

In fact, Lu Xu was stupid and bold, he took high-grade pills at the beginning, and the violent medicinal power would naturally cause a reaction in his body.

Feeling the violent growth of mana in his body, Lu Xu was excited in his heart, and after refining all the medicinal power in his body, he took the second solid spirit pill non-stop.

The same severe pain, the same itching, made Lu Xu, who had been prepared for a long time, really painful. But Lu Xu felt it, this time it seemed to be slightly lighter than the last time, and it seemed that the meridians in his body had adapted to this violent medicinal property.

After taking two pills of solid spirit pills one after another, Lu Xu did not feel anything wrong after refining all the remaining medicinal power in his body, and his mana also improved by leaps and bounds, and he was directly promoted to the cultivation of the second layer of the qi refining period.

The improvement of cultivation made Lu Xu excited, and he immediately took out the "Refining Technique", spread it on the ground in front of him, and then crossed his knees and began to purify his mana.

This refining recipe is not divided into levels, and the whole thing is about how to refine and purify mana.

That's it, in the next time. Lu Xu continued to purify the mana in his body, and after refining and purifying all the mana, his cultivation was reduced to the first layer of the qi refining period. Immediately, he began to take the Solid Spirit Pill again, refining the medicinal power, and once again raising the cultivation to the second layer of the Qi refining period, and then refining and purifying it again. In this way, I kept taking the pill repeatedly, the realm was raised, the mana was purified, and the cultivation was lowered again, and then the pill was taken...... Finally, after three months, the cultivation was firmly established at the second layer of the Qi Refining Period, and at this moment, the more than fifty grains of Solid Spirit Pill were finally exhausted.

Lu Xu immediately took out all the elixirs for refining the solid elixir in the Linglong Secret Realm, and after grinding them carefully, he came to the alchemy room again.

A month later, Lu Xu walked out of the alchemy room with a tired expression, and in his storage bag, Hao Ran placed hundreds of solid spirit pills.

After returning to the medicine garden, Lu Xu, who was mentally exhausted, slept for a day and a night before finally relieving himself. However, Lu Xu did not immediately start taking pills to cultivate, and three months of uninterrupted penance and a month of alchemy made him a little tired. He simply began to practice spells to increase some of his self-preservation power, and he was still a little afraid of being robbed two years ago.

After pondering carefully, Lu Xu decided to start practicing the low-level spells of Wind Blade Technique, Sound Transmission Technique, Stealth Technique, Freezing Technique, Quicksand Technique, and Qi Gathering Technique.

The Wind Blade technique is actually to use mana to condense an invisible wind blade to attack the opponent. This junior low-level spell is Lu Xu's favorite and most diligent practice, and this spell is too suitable for sneak attacks. Just imagine, without the other party knowing, an invisible and untouchable wind blade is coming towards you, and because it is the wind itself, there is no sound of breaking the wind. Thinking about that picture, Lu Xu felt that this wind blade technique was really a necessary spell for sneak attacks.

The stealth technique is to use mana to hide the body into a transparent state, but this spell has little effect and can only deceive mortals, because any immortal cultivator can easily see through it as long as he uses the Heavenly Eye Technique. However, Lu Xu still studied very hard, because this spell and the Wind Blade Technique were exactly matched, and they were both sharp weapons for sneak attacks. Although it's easy to see through, it also requires you to use the Heavenly Eye Technique, who has nothing to do with the Heavenly Eye Technique to sleep every day.

Transmission is a secondary, universal spell that is suitable for secret conversations. If there is something that is inconvenient to say to outsiders, you can use voice transmission to talk. However, this low-level sound transmission technique has a flaw, that is, it is useless in front of high-level monks, and if the other party wants to listen to it, it can be intercepted directly.

Cryo is an offensive spell that uses mana to freeze a certain range of objects. Low-level monks can also freeze a distance of a few meters and more than ten meters, and if it is a high-level monk, they can even freeze rivers and mountains, but it is just a legend that they can achieve this level of cultivation.

Qi Gathering Technique is a kind of auxiliary spell, and its main function is to cover up one's own cultivation, so that the other party cannot see through his strength. It is a practical weapon for pretending to be a pig and eating a tiger.

As for quicksand, it is a spell that assists trapped enemies. This spell causes the ground to form an area of quicksand within a certain distance, trapping the opponent and thus creating an attack. However, this spell has great requirements for the terrain, and it is a relatively chicken spell, but it still has some miraculous effects on certain occasions.

Although these spells are all elementary and low-level spells, for Lu Xu, who only has a flying sword on the street on his body at the moment, it is the only thing that can improve his strength at this stage.