As Xu Mu's brain opened, the originally unattainable natal magic weapon instantly had hope.

"Elder Xu, what do you think?" Ying Tianhong rubbed a pair of futon-sized hands, looking eager.

"You can try it first, but when you find a replacement, you'll have to show me first!" Xu Mudao.

He didn't plan to leave Ying Tianhong to do it alone, because he didn't have any accumulation in refining weapons, and if he did it alone, it would consume too much qi luck and energy.

It is better to let Ying Tianhong make imitations first, and then he uses the system to optimize them.

"It's nature! How to refine the magic weapon? ”

"Wait until I go back and tidy it up, and I will personally send it to Ying Daoyou!"

"Haha! Then I'll wait at home! ”

Ying Tianhongxing, who got the business, left in a hurry and continued to browse various cheats in the Dharma Transmission Pavilion, but unfortunately, "Dari Alchemy" and "Void Transformation" did not have special jade slips.

In the end, Xu Mu only exchanged for two paper books of cheats.

According to the sect's regulations, it needs to be returned within a year, and at the same time, it cannot be passed on.

Back at the residence, Ye Bufan and the others had already returned, and they were busy working in the yard, when they saw Xu Mu coming back, they hurriedly stepped forward to salute, and reported that they had purchased those elixir seeds, as well as daily necessities.

Xu Mu didn't care too much about the aspect, so he handed over the spiritual root of Yu Lingzi to the two of them, and after letting the two of them take care of them carefully, he went back to the room.

The reason why he didn't take out the spiritual root of the jade spirit son and plant it was because Xu Mu knew that the cave would not live for long, and as long as the advanced golden pill would definitely have to be changed.

The current cave house is different, and it will be difficult to replace it in a few decades.

Just take this opportunity to cultivate these spirit roots, even if they can't bear fruit, they can be directly exchanged for spirit stones.

Simply sealing in a storage bag is a waste after all.

After returning to the room, Xu Mu did not rush to cultivate the two newly obtained secret books, but first sorted out the refining aspects of the Heaven Swallowing Bead and the Kunpeng Wings, and then rushed to Ying Tianhong's residence and gave them to the other party.

"Elder Xu, don't worry! With my ability, there will be results soon! ”

"Then please Elder Ying!"

Xu Mu left fifty high-grade spirit stones in pain, and left.

R&D must be costly, Ying Tianhong can't pay for it himself, and these fifty spirit stones are just the upfront cost, how to drum out the magic weapon, there is no three or five hundred high-grade spirit stones, I'm afraid don't even think about it.

"This old boy caught me alone!"

Generally, in the early stage of Jindan, you can't take out three or five hundred high-grade spirit stones, which is to knock the bone and suck the marrow, eat it and wipe it clean.

Fortunately, Xu Mu didn't need the other party to really refine it, as long as he asked the other party to find possible alternative materials, and when the time came, he could refine it himself.

Back at his residence, Xu Mu took out the cheats of "Void Transformation Technique" and began to study the contents inside.

When he wrote everything down, the name of the Void Turning Technique was immediately revealed on the system interface.

[Seventh Order: Introduction to Void Transformation Technique; 8/6400】！

"I've studied the whole cheats for three days, and I only have eight points of proficiency, this cultivation difficulty is really good, fortunately I have a system, otherwise it would be too cost-effective!"

If it was used by ordinary people to cultivate, the difficulty might be higher than that of the eighth-order and ninth-order spells.

Xu Mu did not hesitate and directly began to add points.

[Void Transformation +10]!

[Void Transformation +10]!

[Void Transformation +10]!

……

[Transcendental Illusion Technique; 0/0】！

By the time Xu Mu had raised the Void Transformation Technique to the level of transcendental, more than three months had passed.

"Void Magic!"

Xu Mu pinched the magic trick in his hand, and for the first time really performed the illusion transformation technique.

Under the effect of handprints and spells, the spiritual power turned into some kind of strange mana, and under the effect of this mana, Xu Mu felt that his body suddenly became light.

As soon as his thoughts moved, his whole person immediately turned into a wisp of red smoke, which came out of the robe, shuttling through all corners of the room, and then he tried to get out through the crack in the door, but was blocked by the formation light curtain.

"Sure enough!"

Xu Mu sighed in his heart.

There was no gap in the formation light curtain, and even if he turned into gas, he couldn't get out.

If it can penetrate out, then the effect of this spell will be too great.

In the end, after many attempts, only two features were the most useful.

One is void and can pass through a narrow hole, and the other can curl up into a ball the size of a goose egg, hiding in a small space that is not easy to be noticed.

The most important thing is that his aura will be greatly weakened after turning into a void, and it will be difficult to detect unless it is someone whose cultivation far surpasses his.

If you hide in places such as bottles, teapots, clay pots, etc., it will be even more difficult to be discovered.

"Huh? How does it feel a bit like the god of lights in Aladdin! ”

Xu Mu complained in his heart.

Fortunately, he won't be like the god of lights, who can't get out if he is locked in a small bottle, and as long as he wants to, he can break free with spells at any time.

Of course, he can't make a wish like a lamp god.

Anyway, Xu Mu was quite satisfied with this spell.

Then Xu Mu took out the Great Sun Alchemy Technique and prepared to continue cultivating.

He also had some elixirs on his body to replenish his energy, which was enough to raise the Great Sun Alchemy to a proficient level.

More than a month in the blink of an eye.

Xianyue Palace.

Practice room.

Bang!

Xu Mu was naked, his body was burning with white flames, his body was like a layer of platinum, he swung his fist, tore the air, and slammed into the stone wall in front of him with punches and punches.

A dull crash came from the stone wall, like a violent burst of gunpowder exploding in an enclosed space.

The stone slab in front of him was made of special materials, and no matter how Xu Mu attacked, it was only about half a finger down, and it would soon recover.

After a long time, Xu Mu, who had exhausted his strength, took a deep breath and stopped.

"I didn't expect that it was only half a finger, and it seems that when it comes to the Jindan period, the gap between each layer is really getting bigger and bigger!"

The stone wall in front of you is made of black jade soft crystal, with a thickness of nearly one zhang, which can not only withstand strong attacks, but also dissolve the attacks without causing too much movement.

According to the information that Xu Mu knew, being able to leave a mark one centimeter deep on the ink jade soft crystal means that he has the attack of the Jindan period, and he can leave a mark of half a finger and almost two centimeters deep, which means that he has the attack power of the second layer of the Jindan, and if he can leave four centimeters, it means that he has the strength of the third layer of the Jindan.

One inch is the fourth layer of Jindan, one and a half inches is the fifth layer of Jindan, and two inches is the sixth layer of Jindan.

Four inches is the seventh layer of Jindan, six inches is the eighth layer of Jindan, and eight inches is the ninth layer of Jindan.

Of course, this is just a simple attack power calculation and does not represent the real strength.

After all, many magic weapons and spells do not have attack power, and the attack power of some magic weapons and spells far exceeds the realm where they are located.

Xu Mu didn't have much hope for this "Great Sun Alchemy Technique", he just wanted to use it to reduce the difficulty of breaking through, and now he was able to reach the attack power of the second layer of Jindan in the proficient realm, and he was already very satisfied.

After experimenting with the "Great Sun Alchemy Technique", Xu Mu cast the eighth-order spell he learned from Lu Jingkong, the Sky Shooting Technique.

Now that his Void Technique has reached the consummation level, he can condense four spell arms.

Four giant-like arms covered with runes suddenly charged up and slammed into the wall made of black jade soft crystal.

Thundered!

Four fist prints, nearly an inch deep, are clearly visible.

"It's worthy of an eighth-order spell!"

Xu Mu was excited in his heart, the blow of the Void Technique was equivalent to the attack launched by the four Jindan in the middle stage at the same time, and the ordinary Jindan was afraid that it would be shattered at the beginning of the day.

"It's a pity that the consumption of spiritual power is too great to be used indiscriminately!"

This Void Technique consumed eighty percent of his spiritual power, and the spiritual power to maintain this spell was also huge, with his current amount of spiritual power, it could maintain a maximum of ten breaths.

It's just a wonderful man!

However, this is also something that can't be helped, compared to an eighth-order spell, and it is also a consummation level, if he cultivates the Kunpeng Heaven Devouring Technique, the amount of spiritual power far exceeds the early stage of ordinary Jindan, I am afraid it is impossible to use it.

When he was in the foundation building period, he almost didn't drain him after a cast, and finally relied on the pill to barely support him for a while.

However, this spell is really not bad, it can be used not only for attack, but also for defense, and most importantly, as long as the caster does not accept it and provides spiritual power, it can be maintained forever.

"I hope that I can refine the Heaven Swallowing Bead as soon as possible, and when the time comes, I don't have to worry about the lack of spiritual power anymore!"

After recovering from meditation, Xu Mu continued to hone his spells.

Spells must not only be cast, but also used, and the system will not be able to help him in this regard.

I don't know how long it took, but Du Yu, the master of the Dantang Hall, suddenly summoned him to take up a job in the Dantang.

"I thought I had forgotten!"

(End of chapter)