A moment later, Li Fei and Yue'er appeared in a spacious natural stone cave, a smaller underground river divided the stone cave in two, with a radius of more than ten zhang on each side.

On the side where Li Fei and Yue'er were, there were many luminous gems inlaid on the surrounding stone walls, the view was good, the ground was very flat, it was obvious that someone had specially trimmed it, but because no one had maintained it for a long time, it was full of dust and small gravel. Aside from the flat ground, which indicates signs of man-made, there are no other man-made facilities in the cave. On the other side is the pristine state, littered with rocks and pitch black.

Yue'er suddenly shouted, "Brother Fei, there is a stone cave here! ”

Li Fei went over to take a look, and sure enough, there was a stone cave several feet in size on the stone wall inside, and the light inside was very dim. A moment later, Li Fei and Yue'er appeared in a hall in the stone cave. The hall is simple, except for a stone bed, surrounded by a row of discarded bookcases, staggered from side to side. There were basically no books left in the bookcases, and they were covered with dust.

Yue'er rummaged through it casually and said disappointedly: "Brother Fei, it seems that it is really a cultivation place for martial arts people among mortals, and there is nothing valuable. ”

Li Fei replied absentmindedly while searching: "It's very likely, it's really clean, and you can leave us some ......."

Suddenly, Li Fei kicked an old book in the corner of the bookcase, which was already completely covered in dust, and kicked it out unintentionally. Li Fei picked it up casually and found that it was a beast skin book, dozens of pages thin, which was close to weathering, but fortunately, he didn't kick it hard, otherwise it would all fall apart.

Li Fei carefully restored the book, removing the dust from the cover, revealing the four big characters of "Nameless Sword Spectrum". Seeing that Li Fei had finally made a discovery, Yue'er came over curiously and asked happily, "Isn't it a very powerful exercise?" Li Fei shook his head and said calmly: "It's a book called 'Nameless Sword Spectrum', it won't be a powerful sword book like this, otherwise it won't be abandoned on the ground." ”

Although with the super memory of a cultivator, he could completely memorize the "Nameless Sword Spectrum" with little content after reading it once, Li Fei still carefully took a picture of every page of the "Nameless Sword Spectrum" with a camera, because after turning it this time, the book would be completely turned into fragments.

Yue'er looked through dozens of photos left and right with great interest, and praised: "Brother Fei, this little prop of yours is really good, you can save all the books intact." ”

"It's a camera, you can take pictures of anything you see, the trouble is that you need batteries. Li Fei explained with a smile, and at the same time took a picture of Yue'er.

Yue'er looked at her photo, snatched it, looked at it for a while, and said a little dissatisfied: "The background here is too bad, give me some better photos next time!"

Li Fei patted his head and said regretfully: "When we were playing outside, we just had a good time and forgot to take pictures, and when we went out, we must make up for it!" At the same time, Li Fei scolded himself for being careless and forgetting the existence of the camera before, otherwise, at least leave a memorial for Xue'er, Ruth and others......

Seeing that Yue'er was very interested in the camera, Li Fei simply gave Yue'er a camera, and of course a lot of batteries and photographic paper. Yue'er learned to use it in a few moments, and took several test shots of Li Fei, and said with a smile: "Thank you Feige for the gift, I like this little thing very much." ”

Li Fei said happily: "Yue'er likes it, remember to take out the battery when you don't use it, because you can't use it when it's out of power." ”

Yue'er nodded, took out the battery, carefully put it away, and finally, took the initiative to send a fragrant kiss to express her gratitude to Li Fei.

Feeling Yue'er's enthusiasm, Li Fei's heart moved, took out a jade bottle, and said to Yue'er: "Here are ten high-grade elixirs, and I will also give them to you, I hope it will be useful to you." ”

Yue'er took it casually, and was about to put it away without care, and suddenly shouted, "Brother Fei, what did you just say?

"Is it a high-grade elixir, or is it refined by myself. Li Fei said with a smile. Li Fei also knew that the top-grade spirit pill was very precious, but he didn't expect Yue'er's reaction to be so big, with her status in the Wanhua Sect, she should have seen more rare treasures.

After Yue'er confirmed, she threw herself into Li Fei's arms and kissed him wildly. Li Fei naturally would not let go of the beauty's initiative to give her arms and hug, and made out well.

After calming down, Li Fei couldn't help but ask, "Yue'er, is the top-grade spirit pill really that rare? With the strength of the Ten Thousand Flowers Sect, it shouldn't be difficult to refine, right?"

Yue'er snuggled in Li Fei's arms and sighed: "The general spirit pill is easy to refine, and the medium-grade spirit pill is not too difficult, but the high-grade spirit pill can only be refined by the Dan Ji Sect, and under normal circumstances, they will not sell it publicly if they refine it." ”

Li Fei was still a little puzzled and asked: "Although the strength of the Wanhua Sect is not as good as that of the Danji Sect, how can it be said that it is also the overlord of Fang Yuanxing's side, if you want to acquire a little, the Danji Sect should not refuse, right?"

Yue'er shook her head and explained: "The Dan Dao is difficult, the production of the high-grade spirit pill is very small, and the high-grade spirit pill has a certain effect on breaking through the Dan period, they themselves are not enough, how can they sell it casually, even if there is a small amount of outflow, it is also exchanged for very precious treasures." Although the Wanhua Sect also has a small collection of high-grade elixirs, it is extremely strictly managed, and it is used to reward the monks of the late stage of foundation building who have made important contributions to the sect. ”

Li Fei truly realized the value of the high-grade elixir for the first time from Yue'er's words, and asked curiously: "How much effect does the high-grade elixir have on breaking through the pill period?"

Yue'er said uncertainly: "I don't know how effective it is, and it is also related to the person who uses it, and it is generally believed that it can increase the success rate by two or three percent." ”

Li Fei was surprised: "The effect is very low, and it is impossible to take more than one at a time." ”

Yue'er felt that Li Fei seemed to be too easy to see the Jie Dan, and said angrily: "Do you think that attacking the Jie Dan is as easy as advancing in the Chemical Martial Stage! ”

Li Fei knew that he had made another common-sense mistake, so he smiled awkwardly, diverted the topic, and asked, "How much can the Silent Spirit Pill improve the success rate of the Immortal Pill Stage?"

Yue'er showed a look of yearning and said: "The ordinary Silent Spirit Pill can increase the probability of more than one layer, and if it is a medium-grade Silent Spirit Pill, it can reach about two or three layers!"

Li Fei's eyes lit up, and he said excitedly: "It's still better than the Silent Spirit Pill, the effect is basically ten times that of the top-grade Spirit Pill!"

Yue'er said calmly: "The Elixir of Silence is good, but there are also limitations, a foundation building stage monk can take up to three pills in a row, and if it fails, he can only continue to try to take it after a hundred years." The high-grade elixir is different, although the probability of success is low, but you can take a lot in a row, as for whether you can continue to take it, no one knows, because no one has so many high-grade elixirs to waste. Of course, in addition, there are other pills that can be used to break through the bottleneck, but the effect is different, and the side effects are relatively large, which is relatively dangerous. ”

Li Fei didn't want to think about it so much for the time being, not to mention the Silent Spirit Pill, at least the Top-grade Spirit Pill could be used casually, and said to Yue'er: "Tell me when you are ready to break through the Formation Pill Period, I can refine the Top-grade Spirit Pill for you." ”

Yue'er Jiao smiled: "Thank you Brother Fei first!" However, I am confident that I am more prepared, my qualifications are genius-level, and I should be able to break through within a hundred years, so I didn't go to the last trial star." ”

When Li Fei heard the words "genius level", the scar in his heart was ruthlessly revealed, and he was not interested in talking about this topic anymore for an instant, and he didn't even have the strength to ask about the situation of the trial star, so he said weakly: "Let's study this 'nameless sword book' to see if it is useful." ”

Yue'er is young after all, although her cultivation has reached the late stage of foundation building, she has too little experience outside, and she is usually doted on by countless elders, so she is extremely proud in her heart, and she didn't notice Li Fei's mood changes at all, and she still happily began to study the "Nameless Sword Spectrum".

The "Nameless Sword Spectrum" is divided into fourteen layers, the first five layers are mainly about the application of sword qi, and the last nine layers are about the arrangement and application of the invisible sword array. Li Fei studied for a long time, and felt that the first five layers were basically not difficult, so naturally there was no great use, so he communicated with Yue'er, and Yue'er directly said that the first five layers belonged to the level of mortal martial arts, and the last nine layers were aimed at cultivators.

Li Fei basically agreed with Yue'er's statement, but still planned to start from the first level in order. Li Fei has his own considerations, his own attack means are too single, the power of the silver sword is too ordinary, and he can still deal with opponents with comparable strength, and it is useless if the opponent's strength is slightly higher, he can only rely on daggers and Tianchen microsteps, and this can only have a surprise effect on the later stage of foundation building, if the other party is prepared, it is difficult to gain an advantage.

If he encounters an enemy in the Yudan period, even if it is the "black-robed man" who has encountered a copycat Yudan master before, Li Fei can only use the "Destruction Charm" to drag the enemy and then quickly escape, while there are only three "Destruction Charms", and they will be used up after blocking one or two at most.

After comprehensive consideration, Li Fei said: "Yue'er, I think this is a good place to cultivate, no one will disturb me, I want to stay here for a while, and seriously cultivate the 'Nameless Sword Spectrum'." Yue'er didn't raise her head, and replied casually: "Agree, I found that this 'Nameless Sword Book' should be a first-class exercise, worth cultivating, and I just want to give it a try." ”

In order not to interfere with each other, Li Fei deliberately went to the other side of the underground river to cultivate, found a relatively flat place to sit cross-legged, and began to practice releasing sword qi according to the requirements of the "Nameless Sword Spectrum". Since Li Fei's cultivation far surpassed the highest level of mortal martial artists, it was very easy to practice, and he could release dozens of sword qi in a row before the first sword qi began to dissipate.

After there was no problem with the release of the sword qi, Li Fei officially began the cultivation of the first layer. Not long after cultivating, Li Fei faintly discovered the extraordinary!