The stars are moving, and it is already dawn.

This night, Song Xing did not rest, his eyes were bloodshot, but his heart was extremely excited.

There is no other reason, because this gray stone core does have the function of purifying aura.

Song Xing has been familiar with the Ningchuan Code since he was a child, and it has been recorded on it that he understands that a Qi Refining Realm cultivator is actually accumulating spiritual energy in his body, including the strength of a Qi refining cultivator, and the most direct manifestation is the intensity and quantity of spiritual energy in the dantian in his body.

Of course, this is only objectively speaking, and the actual battle is also affected by many factors such as experience and magic weapons.

In addition to this, Song Xing also knew that when the spiritual energy refined in his body was strong enough, he could start to build a foundation and advance to the next realm, and when the spiritual energy could further converge into a mass to form the legendary 'Dan Liquid', he would have the qualifications to try to break through the Jindan Dao.

Perhaps the condensation of the golden pill is still very far away for Song Xing, but according to the above, the monks have a common feature when they are promoted to the realm, that is, they need to purify the aura, remove impurities, and the purer the aura, the better, in fact, Song Xing has always wanted to enter the 'spiritual pool' soaked in the inner door is also the same effect.

And now the stone core that inexplicably appeared in Song Xing's body just happened to have this function, the stone core can purify the aura, which is simply a great creation for Song Xing, who is still in the realm of refining qi, how can Song Xing not be excited.

Of course, Song Xing was not hot-headed because of this, fantasizing that he could be invincible to the monks of his peers with the stone core, and then soared into the sky, but instead held a spirit stone in his hand, touching his chin and thinking.

Because when Song Xing tried it last night, he found that the stone core actually had a drawback, that is, this stone core could not automatically absorb the aura between heaven and earth, and only the aura that Song Xing himself refined into his body could purify.

In other words, Song Xing needs to find a way to refine more spiritual energy into his body than before, otherwise the amount is too small, and he is afraid that it will not be enough to purify the stone core, if so, it will make Song Xing's promotion slower.

But the problem is, Song Xing is still an outer disciple, where to find so many spiritual qi refining and purification.

Song Xing secretly sighed, if he had a single attribute spiritual root that was praised as the 'Heavenly Spirit Root' by the cultivation realm, with this gray stone core, I don't know how against the sky, the 'Heavenly Spirit Root' is one of the fastest cultivation spiritual roots in the current records, and there may only be a few legendary Dao bodies that can be compared to it.

Thinking of this, Song Xing shook his head and smiled bitterly, he was really greedy, the stone core could purify the spiritual energy was already very rebellious, and he fantasized about those illusory things.

"There is too little aura, and the promotion is even slower, that is because the aura is purified and compressed by the stone core, in the final analysis, the aura refined into the body is not enough, and if you want to quickly obtain a large amount of aura, unless you have a high-grade spiritual vein, elixir or spiritual stone, however, the first two can basically be ignored, the spiritual veins are occupied by the ancestors of the sect, and the elixir is even more expensive, but the spiritual stone is ......" Song Xing touched his chin and thought, on weekdays, he earns spiritual stones by making talismans or collecting medicinal herbs," Unless the herbs can be found in the spirit grass of the previous year, they can't exchange many spirit stones, and if they can make the beast spirit rune that Elder Shi demonstrated that day, they should be able to exchange a lot of spirit stones. ”

Immediately, Song Xing also ruled out this possibility, the beast spirit talisman needed the demon beast spirit, although he felt that his strength had improved a lot now, but he didn't dare to think about it, unless he had reached the cultivation of the fifth layer of qi refining, after having the magic spell, he could give it a try.

The beast spirit rune can't be made for the time being, but ordinary spirit runes can be tried, Song Xing glanced at the blank rune paper on the table.

Coming to the table, Song Xing picked up his pen and started to make spirit runes again, in order to improve efficiency, Song Xing chose the 'Wind Talisman' and 'Flame Talisman' that he was most familiar with.

The pen moves like the wind, a day passes in a hurry, Song Xing looked at the spirit runes on the table, he used to make every three or four spirit runes The aura will be exhausted, and now although the dantian aura has become less, there is nothing to do when making five or six in a row, and the effect of the aura being purified is fully revealed at this moment.

In the next few days, Song Xing returned to his normal life, but divided his time into two parts, one part was used to depict and make spirit runes, and the other part was to continue to study the gray stone core in his body to see if there were other effects.

In the blink of an eye, more than ten days passed, and Song Xing finally recovered to the third-level Great Perfection cultivation of Qi refining, but looking at the empty storage bag, Song Xing smiled bitterly.

These spirit stones were originally accumulated by him and used to prepare for the retreat breakthrough, but he didn't expect that all of them would be used to restore his cultivation at this moment.

However, at this moment, the three layers of aura refining in Song Xing's body have all been purified, and if they are replaced with the previous level of aura, the amount is at least the same as the fourth layer of qi refining, or even more than that.

Therefore, Song Xing was even more curious about this gray stone core at the same time, what is this thing?

During this period, Song Xing also tried a few times, without using spirit stones, only relying on his own cultivation, but his spiritual roots were too poor, and the spiritual energy refined was very small, and after purification, when he arrived at the dantian, it became a filament, and the amount of spiritual energy in his body almost did not change, and if he continued like this, he didn't know what year or month it would take to break through the fourth layer of qi refining.

"It's not a problem to improve the realm now, you just need a lot of spirit stones. Song Xing touched his chin, thoughtfully, he had not been able to break through the fourth layer of qi refining before, it was because the spiritual root was too poor, and the spiritual energy was not pure, now that he had a stone core, he didn't need to worry about these problems, the only thing to consider was the spirit stone, a large number of spirit stones.

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There is a fang market in the west of Ningchuan Lake, in addition to the people of this sect, many immortal cultivation families and scattered cultivators will also come here to trade items, so it is quite lively, if you are lucky enough, you can often hear rumors that so-and-so bought high-level magic weapons at a low price.

On this day, a thin and clear-eyed young man came here, this young man was Song Xing, and he brought the spirit rune he had made, and he was also going to sell it here.

Song Xing looked at it from afar, saying that it was a square market, in fact, it was similar to a small town, a gray stone archway at the entrance, a bluestone road entered, the shops on both sides were arranged, row upon row, and there was a faint spirituality on it, obviously it was a spell that was applied by someone to attract guests, and even the shop signboard was shining with colorful brilliance, which looked really eye-catching.

Song Xing glanced at it, there was nothing too urgent, and he didn't linger, and walked straight into a grocery store with a slightly remote location.

The owner of this shop, surnamed Zhuang, is an old man with a short beard under his chin, and always has a faint smile on his face, looking honest and kind.

Entering the store, Shopkeeper Zhuang glanced up at Song Xing, the corners of his mouth grinned, and said, "It's you kid, but I haven't seen you for a while." ”

"What's the matter, are customers welcome to come to the door as a shopkeeper?" Seeing the displeased look of the shopkeeper Zhuang, Song Xing wanted to smile at him, took out the spirit rune and put it on the counter.

This shopkeeper Zhuang is only honest on the surface, but in fact he is very shrewd, if you are not careful, you will be sold by him, and you have to smile to help him count the money, so Song Xing generally calls him Old Man Zhuang, at first the two calculated each other, and then the old and the young could not win anyone, but they looked like chess opponents.

However, Old Man Zhuang has all the things here, and he can find all the things that Qi refining disciples need here, and the quality is high compared to other shops, which is also the reason why Song Xing likes to come here, of course, the premise is that your spirit stones are enough.

"Hmph, as soon as you kid comes, I'm going to break the bank. Old man Zhuang rolled his eyes, and angrily picked up the spirit runes and counted them carefully, "Fifty low-level flame runes, huh, ......" Gradually, Old Man Zhuang found that these spirit runes seemed to be different, although they were low-level runes, but the spiritual energy contained in them was extremely pure, almost comparable to low-level and middle-level spirit runes.

"What's the matter, Old Man Zhuang?" Song Xing was leaning over to look at the items on the container, when he heard the voice, he turned around and asked.

"Hehe, it's nothing, people are old, and their eyes are no longer good. Old man Zhuang laughed dryly, although he was puzzled, he hurriedly accepted the spirit rune, and was happy in his heart, and when the price was raised, at least he could sell a lot more spirit stones.

"How is it, what is eye-catching?" Old man Zhuang was in a happy mood and came to Song Xing's side.

"What is this?" Song Xing picked up a black cloak on the platform.

"Oh, this one, it's a foundation building scattered cultivator put here, it's called Su Jindou, and it's infinitely ......useful. ”

"Okay, don't blow it, can you say what it does?" Song Xing rolled his eyes.

"Ahem, this thing is mainly able to cover people's breath, and the deeper the aura, the greater the effect, as long as the aura is enough, even the foundation building monks can't see through it, but well, it's only limited to the foundation building for the following use, the loose cultivation is already the late stage of the foundation building, and I don't think I can use it, so I'll put it here." Old man Zhuang's face turned red and he coughed dryly.

"We Qi refining disciples, how can there be so much spiritual energy that the foundation building seniors can't see through, and I will take the two spirit stones. Song Xing's heart moved, but he said quietly.

"Boy, although the price is sky-high, it is not so. Hearing this price, Old Man Zhuang almost jumped.

"It's too little, then you return the spirit talisman to me, and I'll sell it somewhere else." Song Xing muttered, without raising his head, as if talking to himself.

"You ......" Old man Zhuang gritted his teeth, his beard was crooked in anger, this kid had already calculated him, but then he thought about it, indeed, the qi refining cultivator doesn't have so much spiritual energy, and this kid doesn't have much effect to buy it, wasting spirit stones in vain, thinking of this, Old Man Zhuang was in a balanced mood, and snorted: "This time it's cheap for you kid." ”

"Thank you. ”

Song Xing knew his thoughts, laughed, but did not break it, removed Su Jindou, settled the remaining spirit stones, and then turned around and left.

Song Xing is now carrying a gray stone core, and I don't know if anyone can see the clues, he has a cautious personality, so he has been worried about this matter, and Su Jindou can hide his breath, which gives him more security.

"The purer the aura, the better it works. Song Xing chuckled, this is really suitable for him, and he casually entered a trace of aura, which can indeed isolate the aura, of course, what the specific effect is, you still have to try it to know.

However, Song Xing will not be stupid to rub in front of the monk with high cultivation, and it is better not to meet if he can avoid it.

Song Xing returned to the sect along the river bank, and suddenly a figure flashed over Song Xing's head, and before Song Xing could take a closer look, two more figures fell.

"Hey, did you just see anyone passing by?"

The two stepped forward, first stunned, and then one of them laughed wildly and said, "Haha, it's you kid, it's not dead." ”

These two people are Zhou Tong and Du Jiang.