However, Chu Du felt that with the help of the two BGMs of "World of War" and "Borrow Another 500 Years from the Sky", everything was not a problem, and the biggest problem for him was that there were no spirit stones!

After the two Great Zhou Days were over, Chu Du stood up and looked at his attribute panel.

Host: Chu Du (Qi Refiner)

Repair: None

Exercise: Induce Qi to decide

Spell: None

BGM: (1) "Invincible"

(2) "World at War"

(3) "Borrow Another 500 Years from the Sky"

"Well, although the cultivation is still none, but he has finally changed from a mortal to a qi refiner!" Chu Du said happily, now he has finally truly stepped into the immortal path.

The next time is to earn spirit stones while cultivating, but fortunately, you can't use spells during the qi refining period, so you don't need to spend more time on cultivation, so you can have more time to earn spirit stones.

The cultivation of the entire Qi refining period is actually to constantly open up the dantian qi sea, Chu Du found that there were clouds of dark cloud-like gas floating in his dantian qi sea through internal vision, there were thirteen groups of such gas, and one was bigger than the other, Chu Du tried to touch these gases with the aura in his body, and found that his aura could not penetrate these dark clouds at all, and forcibly drilled through the smallest dark clouds, Chu Du found that although the aura drilled through, it also consumed some aura.

The opening up of the Qi Sea during the Qi Refining Period actually refers to the use of Spiritual Qi to refine these gases, the gases in these dantian are called the source of mana in the Xuanhuang Great World, and this gas will sink to the bottom of the dantian after being refined by the spiritual energy to form a liquid like flowing water, when this liquid gathers enough, the monk can start to try to impact the foundation building realm.

Theoretically speaking, the larger the source of refining mana, the more mana the sea of qi can hold in the future, and the more mana, the greater the natural advantage over the enemy, and the consumption of some powerful spells is very high, and of course the mana can be used casually.

The actual situation is not so simple, first of all, refining the source of mana is very time-consuming, the monk Shouyuan is 200 years old during the Qi training period (some pills can increase the lifespan), under normal circumstances, it takes a year for the smallest mana source to be completely refined, but the time required for each one is twice as long as the previous one, and the minimum requirement for entering the foundation building period is to refine the source of seven mana, so it will take a total of 127 years, people in the Xuanhuang Great World generally start cultivating at the age of 13, plus the time it takes to break through the last step, in fact, the time of the monk in the Qi refining period is extremely tight, which is still calculated according to the most ideal cultivation timeIn fact, it is impossible for a monk to stay still all day and only do this one thing of cultivation, at least the monk in the Qi refining period still has to eat.

Secondly, even if you have a good cultivation talent or have enough pills to take, and you have refined more than seven mana sources in a limited time, you still have to face the most difficult problem, that is, the more mana sources are refined, the more difficult it is to enter the foundation building period, because entering the foundation building period is to fill all the empty places where the source of refining mana comes from with mana at one time, which is a very difficult thing for the qi refining period cultivators, and the larger the space opened up, the more difficult it is to fill it at one time.

Therefore, with the above two problems, the vast majority of Qi Refiners in the Xuanhuang Great World only refined the source of seven mana, and the source of seven mana also represented the seven-layer cultivation of the Qi refining period.

"Hey, I'm more than 4 months behind others, but fortunately, my aura is not weak, and refining the source of the first mana is not necessarily slower than them. Chu Du looked at his dantian qi and thought to himself.

Next, Chu Du tried to control the source of mana in the sea of spiritual energy in the dantian qi refining the smallest mana, and found that the operation was not difficult, but when refining, the source of mana was like a piece of iron that was extremely hard, and the aura was a small file, what Chu Du had to do was to use this small file to file this piece of hard iron into powder little by little, this is a water grinding work, and the only way to complete it easily and faster is to turn this small file into a big file as much as possible.

An hour later, when Chu Du felt that he was a little dizzy, Chu Du finally used a small file to file a little scrap from this piece of iron, carefully observed the bottom of his dantian qi sea, and found that a drop of black liquid was lying there quietly, exuding a faint luster, this is the real source of mana, with this liquid in the dantian qi sea, it will enter the foundation building realm in the future, and the aura will also be converted into mana for the monk to cast various spells.

After resting for a while, Chu Du continued to cheer up and began to refine, anyway, today's things in the spiritual field were done.

The following days Chu Du spent every day in great busyness, spending half a day to quickly take care of the Lingtian, and the rest of the time was spent except for three hours to eat, sleep and rest, and the rest was all used to refine the source of mana and meditate on the Great Zhou Tian to refine the muscles and veins of the flesh body, fortunately, Chu Du's physical fitness was extremely strong in the Nether Realm, even if he only rested for so much time every day, he was still full of energy.

The busy days passed quickly, and in the blink of an eye, another month passed, Chu Dunei looked at the source of mana in his dantian qi sea that had been refined by him for almost half of his face, his face was full of joy, the refining speed far exceeded his estimate, according to the current refining speed, it would take at most 2 months to refine all the sources of mana, which was also due to the fact that the aura he started was much stronger than others.

Chu Du found that after refining the source of mana every day, the aura in his body also became more and more pure, and he was more handy in control, and the time to run a big week was greatly shortened, in the past, it was only possible to run a big week in an hour, but now it can be completed in almost half an hour, so the number of tempering of the body and muscles and veins is naturally greatly increased, and Chu Du feels that his physical strength is stronger than when he first came.

Finding the pig-killing knife brought from the Nether, it was useless for so long, Chu Du found that this knife was already cold and shining, without a trace of rust, this knife has always been with him in the Nether, because when he traveled all over the Nether, he had already practiced that kind of knife technique to the point that he could instantly cut out 24 knives in the same position with a single blow, even without the blessing of BGM "Pig Killing Knife", the power of such a knife technique is enough to deal with a first-level demon beast.

There is nothing for Chu Du to do in Lingtian today, after practicing in the morning, Chu Du decided to go down the mountain in the afternoon to try to hunt demon beasts, this decision was not Chu Du's idea when his head was hot, he had already begun to plan to hunt demon beasts, although the first-level demon beasts sprayed when he and Senior Brother Hu went up the mountain made him feel strong, but according to the strength and speed of the demon beasts he observed at that time, he felt that although he was not the opponent of the first-level demon beasts at that time, he asked himself to run away without any problem.

During this time, Chu Du found a lot of information about the distribution and habits of the demon beasts around the Juyang Sect, and the kind of demon beast he was going to hunt was called the Golden Devouring Tiger, this kind of demon beast was not the strongest among the first-level demon beasts, and the most important thing was that this kind of demon beast acted alone, which greatly reduced the danger of hunting it.

Everything was ready, Chu Du quickly rushed to the bottom of the mountain, according to the information in his mind, Chu Du came to a mountain not very far from the Giant Yang Sect, this mountain is not very tall, the peculiar thing is that all the stones on the mountain are light red, this is because these stones contain some metal elements, and the Golden Devouring Tiger loves to devour these stones containing metal elements, so here you can basically meet the Golden Devouring Tiger who comes to devour the stones.

Chu Du found a suitable place to hide, and kneaded a handful of stinky grass picked from the road and smeared it on his body, even if the grass does not knead the juice, it will emit an unpleasant smell, Chu Du smelled the smell on his body and wanted to vomit, but there was no way, he had to rely on this smell to cover the smell of his body, so that the gold-devouring tiger could not smell the human smell on his body, this kind of demon beast was cautious and suspicious by nature, unlike other demon beasts that immediately pounced on him when they smelled human smell.

Do these Chu Du hide yourself, try not to make a little noise, and wait for the appearance of the Golden Devouring Tiger.