Time flies, eight years have passed in a blink of an eye, and it is now March of the 15th year of Chongwen of the Great Zhou, and now Ling Yu is 16 years old, he is more and more handsome, his face is like a jade crown, and at first glance he is a beautiful young man.

In the past eight years, Ling Yu's cultivation has been quite diligent, and now he is already a third-level Great Perfection cultivator, in addition to cultivation, Ling Yu has also spent a lot of energy studying various spirit guides with Xiao Ling.

He improved the previous rolling pin, although the appearance has not changed much, but the function is infinitely close to the lighter, and there is no need to put the spirit crystal, through the spirit gathering rune deduced by the small spirit, after Ling Yu's modification, now only need to flip the switch designed by Ling Yu, you can release the lighter charm, and you don't need to use your own aura.

This is a huge progress, indicating that the spirit guide is more suitable for ordinary people, if Ling Yu plans to open a chamber of commerce to sell, then it is estimated that he can make a lot of money.

In fact, Ling Yu really had such a plan, but he hadn't figured out how to implement it yet. Of course, over the years, Ling Yu has not only done this, in addition to improving lighters and pumps, he has also made a lot of things through the runes that Xiao Ling has deduced or created over the years.

For example, the whirlwind rune created by Xiao Ling after analyzing the wind rune, Ling Yu used the characteristics of the whirlwind rune to design a fan, this fan is similar to the shape of Ling Yu's floor fan in his previous life, this fan body was built by him in the city and paid a blacksmith to help build, it cost him 1 silver coin, and the whole body is made of pig iron, this material can withstand the spiritual energy required to activate the rune within the fourth level.

Of course, this fan is also very different from those electric fans in Ling Yu's previous life, he canceled the power system, set a switch at the core body of the fan, and carved the spirit gathering rune, this rune is used to save spirit crystal energy when the fan is running, as well as the spirit attraction rune and shielding rune.

This shielding rune is a new rune created by Xiao Ling in the past few years, the function is to disconnect the connection between the spirit attraction rune and the spirit crystal, this is the rune that Ling Yu asked Xiao Ling to deduce when he was studying the switch, and it can be realized that when the switch is turned on, the spirit rune will start to extract the energy of the spirit crystal, and when it is closed, it will be disconnected.

In the original motor position of the fan, Ling Yu designed a spiral blade with the whirlwind rune, and after the whirlwind rune was activated, the spiral blade would be pushed to rotate and drive the fan blades outside.

Then connect the three runes of the spirit attraction rune, the spirit gathering rune, the shielding rune, and the whirlwind rune using a specific rune link method performed by the small spirit to make it realize the flow of spiritual energy, and then open the specially set spirit crystal warehouse and put it into the spirit crystal, and turn on the switch to enjoy the cool breeze brought by the fan, but as the first generation of products, its speed is not fast, and the speed cannot be adjusted, only a simple switch, but because of the switch and shielding rune, the spirit crystal can always be placed in the warehouse, and there is no need to worry about the energy waste of the spirit crystal.

Last summer, the weather was very hot, and the psionic fan could no longer meet Ling Yu's requirements, so Ling Yu used his brain, thinking about whether it was possible to develop an air conditioner, but after checking it out, he found that many technologies could not be realized, so he had to settle for the second best thing, and let Xiao Ling deduce it to see if he could create a rune that emitted cold air all the time.

So Xiao Ling deduced the cold rune by analyzing the ice shield rune of the water rune type, which is to create a special ice block that constantly emits cold air, and ensures its existence during the continuous input of spiritual energy and there will always be cold air overflowing, and after disconnecting the spiritual energy input, it will disappear in a few seconds, and will not leave water stains.

Ling Yu tossed again, and designed the world's first "air conditioner", well, it is actually an air conditioner. The body is about 30 centimeters long, 20 centimeters wide, and 10 centimeters high, which is not very large, in fact, it is not that Ling Yu does not want to design a larger one, but it is not necessary, because the efficiency of spiritual energy output is not known how many times greater than electrical energy.

There is a button arranged on the top surface of the body, which is considered a switch, and in the middle is the spirit crystal warehouse, which is used to place the energy source spirit crystal. There are air outlets on all sides of the side, which are used to blow the cold air out, and the bottom of the body is engraved with the spirit gathering rune, which is also to save the consumption of spirit crystals when starting the air conditioner, and the top point is a spiral blade similar to the fan, but this spiral blade is designed to increase the type of wind output, using a cyclone rune to drive it, and the upper part is a refrigeration chamber used for refrigeration, which is engraved with ice runes.

After turning on the switch, the spirit introduction rune will first export the energy of the spirit crystal, due to the existence of the spirit gathering rune, the energy export speed of the spirit introduction rune will be slowed down, and the spiritual energy generated by the spirit gathering rune will be consumed first, and the energy of the spirit crystal will be consumed after it is used up, and then transmitted to the whirlwind rune and the ice rune, after activating the two runes, the wind will be generated by the rapid rotation of the spiral blades, and then blown through the gap of the refrigeration warehouse, The cold air inside is blown into the room by the air outlets on all sides to create a cooling effect.

Of course, Ling Yu has also made a lot of gadgets and some spirit runes in addition to cultivation over the years, causing him to only cultivate to the third level of the Great Perfection, many times he will spend a lot of time studying the method of combining spiritual energy and technology, and sometimes he will let Xiao Ling turn on the work mode, make spirit runes or carve runes on some items.

Therefore, for many years, Xiao Ling has been unable to continue to accelerate Ling Yu's cultivation, Ling Yu's cultivation has reached the third level of Great Perfection, and Xiao Ling's spiritual energy storage is only equivalent to the level of a fourth-level mid-stage spirit master, so the acceleration has always been 50% and cannot continue to speed up.

It is said that even if it is accelerated by 50%, with Ling Yu's talent and qualifications, it will not be able to cultivate this way, but as I said before, since Ling Yu transformed the lighter and created the spiritual energy fan, he will spend more time and energy designing some household appliances in his previous life, and the cultivation time is relatively small, plus Xiao Ling often turns on the working mode and cannot store spiritual energy, so Ling Yu's cultivation speed has also slowed down.

At the beginning, Ling Yuefeng saw that Ling Yu was obsessed with studying various spirit guides, and he was a little worried about the impact on Ling Yu's cultivation, and he also asked Ling Yu a few times. It wasn't until Ling Yu made a psionic fan and showed it to Ling Yuefeng that Ling Yuefeng didn't ask any more.

Although Ling Yu was obsessed with studying spirit guides, he had made things that Ling Yuefeng had never seen before, and the concept of using this spirit guide was very different from the past, Ling Yuefeng felt that the development of this spirit guide made by Ling Yu would have unexpected gains.

Another point is that Ling Yu asked Xiao Ling to deduce the runes created, Ling Yu also picked the whirlwind runes, the ice runes and the shielding runes came out to report to Ling Yuefeng, the spirit gathering runes were too strange, and they were also related to Xiao Ling, so he didn't dare to say it, and he also made up his mind, when manufacturing the spirit guide in the future, either the spirit gathering rune was not used, or it was hidden, for insurance, it was also necessary to depict the self-destructing rune on the spirit guide that had been made, if someone wanted to disassemble and study the key parts, let it start self-destructing.

When Ling Yuefeng listened, he was speechless for a long time, as a ninth-level spirit master, he had created less than 10 runes now, and as a result, his disciples had already created 3 in just a few years, and this disciple who had repeatedly surprised him again brought him surprises.

In addition, in his eyes, Ling Yu's cultivation speed was basically in line with his expectations, so after he took the first psionic fan that Ling Yu made, he let Ling Yu arrange his own cultivation.

Early this morning, Ling Yu woke up from his cultivation and habitually asked, "Xiao Ling, what time is it?" ”

"Master, good morning, it's 7:30 on March 10, 15 years of Da Zhou Chongwen." Xiao Ling greeted.

Ling Yu got up, washed up, and went out of the door, since making the air conditioner, Ling Yu began to devote more time to cultivation, and began to improve slowly.

Ling Yuefeng was still reading a book leisurely on the recliner under the tree in the courtyard as usual, since the chaise longue was brought back by him, he had been so relaxed.

"Master is early." Ling Yu greeted.

"Get up, I see that you've been spending more time on cultivation lately, have you encountered any difficulties in the production of spirit guides?" Ling Yuefeng asked.

After all, Ling Yu used to tinker with the spirit guide every day like a crazy demon, often until the middle of the night, and only entered the state of cultivation when he was resting, and got up very early in the morning to continue tinkering, which caused the cultivation time to be shortened a lot, if it weren't for the golden thigh of Xiao Ling, he would definitely not have the current cultivation.

"No, Master, the apprentice feels that his cultivation has fallen behind a lot, so I think it's better to allocate time reasonably." Ling Yu said.

"Well, cultivation and the production of spirit guides are both the right path for spirit masters, and reasonable distribution goes hand in hand." Ling Yuefeng said.

After the master and apprentice chatted a few words, Ling Yu went to prepare breakfast.

After the meal, Ling Yuefeng said: "Yu'er, I have something to do for my teacher to go far away, I'm afraid it will take a long time this time, and my teacher has already helped you register and go to the Great Zhou Empire's Royal Spiritual Energy Academy for further study." ”

"Are you going to study?" Ling Yu was at a loss, the good master suddenly wanted to go far away, and suddenly wanted to send him to the academy to study, but although he was puzzled, Ling Yu had also been used to obeying the master's arrangements for many years, and he believed that the master must be for his good.

"Well, the teacher has already helped you complete the formalities, you are in the third grade of junior high school, the Great Perfection class, and the teacher will take you there tomorrow." Ling Yuefeng said.

In fact, Ling Yuefeng was in a hurry to leave because of the instability in the north, for the sake of his friends, and for the country he loved, he had to go over to sit in person, and he also planned to send the 16-year-old Ling Yu to the Psionic Academy for further study this year, and he was going to the Northland, so he simply arranged Ling Yu to the Psionic Academy, so that he would be more at ease when he went out, after all, the academy would not be in any big danger.

"Okay Master, then I'll go and get ready." Ling Yu didn't say much, it was not a bad thing to go to the academy for further study, maybe he could learn something, so he went back to the room to tidy up, put the things he was going to bring into the bracelet, and went out at about 10 o'clock, and went to Li Shu's house, since he was leaving, then he should also go to say goodbye to his good friends, after all, there would not be too much time to come back from the academy.

Speaking of Li Shu, this kid's qualifications are also okay, after Ling Yu taught him to feel the spirit, he was very attentive to cultivation, and he was very diligent, and on the third day when he began to feel the spirit, there was already an aura affinity, and on the fourth day, he entered the early stage of the first level and became a spirit master.

This made Li Shu feel greatly encouraged, and since then he has been more diligent in his cultivation, and he is lying on the bed and can't move, and his cultivation posture is naturally better to meditate, and his effect will be discounted a little, so it took him four days to enter the early stage of the first level, which shows that this kid's qualifications are also very good.

Perhaps because of cultivation, spiritual energy circulated in the meridians, Li Shu's injury healed quickly, and he could go to the ground in less than a month, and after three days, Li Shu would go to Ling Yu to exchange cultivation experience, and sometimes ask Ling Yuefeng what he didn't understand.

Now Li Shu is also a cultivator in the early stage of the third level, which is not bad, he also knows some of the things that Ling Yu is tinkering with, and Ling Yu's things are naturally indispensable to him, when Ling Yu reached the third level spirit master, he went to the city to create a bracelet with an inner cast iron and an outer silver, the style is a bit like Ling Yu's bracelet, and then carved an ordinary storage rune on it, made into a storage spirit guide, and gave it to Li Shu, of course, Ling Yu made other spirit guides, and Li Shu also had them.

There is no way to do this, after all, gold and silver can only be used as jewelry or currency, not as materials for spirit guides, and the internal use of pig iron that can withstand runes below level four to create the theme, and the outer bread silver to make him look good.

It's a pity that Ling Yu, the storage rune modified by Xiao Ling, can't be carved yet, and that can only be done by a spirit master above level four.

It stands to reason that runes have no level, and the higher the level of the spirit master, the more powerful the rune will be, but the rune modified and strengthened by the spirit spirit needs to be one level higher than the spirit master's rune entry level three, and it can only be carved when it reaches level four, such as the storage rune of the little spirit.

However, the runes created by Xiao Ling will not be like this, of course, no matter which one it is, it is suitable for the higher the level of the spirit master, the stronger the rune.