Mortal: Even with a Heavenly Spiritual Root, I still have to try and get my hands on the Little Gree

Chapter 154: Using demonic energy to cultivate gold-devouring insects and forge the Azure Origin Swo

All seventy-two Golden Thunder Bamboo plants had matured. After harvesting the branches, leaves, and main stems, Mu Yu kept the rhizomes of the Golden Thunder Bamboo.

Next, Mu Yu used his Nascent Soul stage level divine power to seal this place, and this seal will last for about ten thousand years.

With Mu Yu's current mastery of array formations, it's estimated that no one in the entire human realm could break through an array of this level.

Ten thousand years later, if any lucky person manages to break in, they will probably be able to find a forest of golden thunder bamboo.

In this way, they could find a legitimate way out for the Golden Thunder Bamboo in their hands and Han Li's hands.

Among high-level cultivators, there are countless opportunities, such as the Fire Dragon Boy accidentally eating a celestial fruit, which is quite common.

Ling Xiaofeng of the Star Palace also happened to encounter the underwater volcanic eruption and obtained the Yuan Magnetic Divine Mountain.

It's just a Golden Thunder Bamboo Forest in a mere secret realm, so it's not too outrageous.

Everything was ready, but Mu Yu did not immediately begin refining the magic weapon. Instead, he led 800,000 Gold-Eating Insects to the Demon Abyss near the Boundless Sea.

Mu Yu's cultivation has now reached the Nascent Soul stage, and he is considered a relatively powerful being within that stage.

Therefore, now that the strength has been achieved, it is only right to deal with the true demonic energy in the human realm.

of course……

Mu Yu's true purpose was to use the sealed true demonic energy to infuse the Gold-Eating Insects with its energy.

The Gold-Eating Insect has an extremely strong body and can eat almost anything.

In the method for cultivating mature Gold-Eating Insects developed by the Tuwu people, besides those rare materials, the most important point is the infusion of the body with the primordial energy of heaven and earth.

Normally, given the current concentration of spiritual energy in the human realm, it is impossible to rapidly mature the Gold-Eating Insects on a large scale.

But it doesn't matter, there are still many places in the human world that seal away demonic energy, and what they contain is genuine demonic energy from the spirit world.

As for whether using demonic energy instead of spiritual energy will cause any problems...

Mu Yu had already investigated this matter using his talent for seeking good fortune and avoiding misfortune, and there were no problems.

Moreover, even if something unexpected happens, it doesn't matter. Anyway, Han Li still has more than 100,000 Gold-Eating Insects. If he spends a little more time cultivating them with a large amount of Rainbow Grass, there may be even more.

However, Mu Yu was unwilling to waste that green liquid.

In addition, the difference between demonic energy and spiritual energy is not actually that great; the dense demonic energy in the demon realm can assimilate spiritual energy.

Similarly, spiritual energy can also purify demonic energy.

Although the purification process took a while, that was insignificant.

After venturing deep into the Demon Abyss, Mu Yu began setting up various formations.

Mu Yu has a total of 800,000 Gold-Eating Insects. Every 5,000 Gold-Eating Insects enjoy one Infusion Formation, so only 161 need to be set up in total.

As for why there's an extra one...

Of course, it's because Mu Yu's 800,000 Gold-Devouring Insects weren't exactly the right number; there were naturally some left over.

Next, Mu Yu began to break the seal left behind by the ancient cultivators. Without making the seal completely ineffective, he drew out some true demonic energy and began to infuse the Gold-Eating Insects with it.

After all, this was the first time, and Mu Yu had even changed the plan without authorization, replacing spiritual energy with demonic energy.

Therefore, Mu Yu initially focused on breeding only a few thousand individuals and spent several months observing them.

Several months later, when the gold-devouring insects still showed no abnormalities and their auspicious and inauspicious talents did not indicate any ominous signs, Mu Yu began a formal and comprehensive cultivation plan.

The cracks in the seal grew larger and larger, and Mu Yu consumed a massive amount of true demonic energy.

He placed the demonic nascent soul into the humanoid puppet and left it there to keep watch, while Mu Yu himself returned to Spirit Turtle Island to prepare to refine the magic weapon he had been looking forward to for a long time.

He sent out a communication talisman, summoning Xin Ruyin, who had just broken through to the Nascent Soul stage, to assist him in refining the treasure.

Given Mu Yu's current state, refining a spiritual treasure wouldn't require much effort, but refining this magic weapon would still require Xin Ruyin's assistance.

It is clear that the treasure Mu Yu is preparing to refine is no ordinary item.

When Xin Ruyin arrived at Mu Yu's weapon-refining room, she was shocked by the various rare treasures casually placed on the ground around her.

A Spirit Eye Tree even thicker than the one at Yunmeng Mountain, a Soul Nourishing Wood of nearly the same size, and... those real seventy-two Golden Thunder Bamboos!!!

Mu Yu has actually collected all three of the legendary divine trees in the human realm, and in such large quantities.

At the same time, what Xin Ruyin found even more unbelievable was that the seemingly ordinary vines that were casually tangled on the ground were actually the legendary Xuan Tian Immortal Vine.

The activity level... if you said it was just picked, Xin Ruyin would believe it.

Besides these, the various rare and precious auxiliary materials left Xin Ruyin somewhat dazzled, as if she were in a dream.

"It seems that your cultivation speed is quite good after the problem with the Dragon Roar Body was resolved."

"These are some pills for Nascent Soul stage cultivators; consider them payment for your hard work."

"Come, take a look at the refining method I've deduced. Are there any areas in the formation that need adjustment?"

Mu Yu tossed Xin Ruyin a jade slip and three full jade bottles, then began to busy herself with her own tasks.

Not long after, Han Li also walked in from outside. He was slightly stunned to see Xin Ruyin there.

"Han Li, I need to use your Taiyin Firebird to refine this treasure. This is a good opportunity to let your Taiyin Firebird and my Sun Fire Horse try out the Yin-Yang interaction."

"If it succeeds, the flames born from the convergence of Yin and Yang will surely be extraordinary."

As Mu Yu spoke, he took out the Yin-Yang Five Fire Fan and used it as the foundation of the array to set up a special array that could generate various spiritual flames.

Under normal circumstances, the so-called Yin-Yang convergence requires either the essence of the sun or the true fire of the moon to devour one of them in order to cause a qualitative change.

However, Mu Yu was naturally unwilling to consume a type of flame, so he decided to use another method to continuously weaken and replenish the solar essence fire and the lunar firebird.

Once these two flames achieve a yin-yang convergence, one can obtain two flames of equal power in one fell swoop, without suffering any damage to one's own foundation.

As the Taiyin Firebird and the Taiyang Essence Fire entered the formation, the pile of spirit stones on the outer edge of the formation, which resembled a small mountain, began to descend at a visible speed.

Every now and then, a puppet at the Nascent Soul stage would add various spirit stones into the formation.

The array used to generate various spiritual flames actually consumes far more energy than it appears, and such an array is simply not something that can be set up in the human realm.

But... Mu Yu secretly stole the spiritual energy that was originally used to purify the seal of true demonic energy.

Within the Demon Abyss, a demonic nascent soul is stealing true demonic energy to infuse into the body of the Gold-Devouring Insect.

To accelerate its growth into a mature organism.

On Spirit Turtle Island, Mu Yu extracted the pure spiritual energy from the seal to cultivate two rare spiritual flames.

The two formed a perfect balance, and the primordial energy of the entire Tiannan region appeared unchanged.

……

After months of preparation, with the help of Xin Ruyin, Mu Yu successfully completed the final modifications to the sword box.

The so-called sword box was naturally a magical artifact crafted by Mu Yu to nurture the Azure Bamboo Bee Cloud Sword within his body.

Mu Yu's natal magic weapon, after being nurtured by the Five Elements Spiritual Infant for over a hundred years, is already quite powerful.

However, Mu Yu was naturally not satisfied with this progress.

Therefore, Mu Yu thought of Qing Yuanzi's method of planting swords: since the Azure Bamboo Bee Cloud Sword could be sealed on the Golden Thunder Bamboo and grow together with it...

Are there any other ways to accelerate the cultivation process of one's natal magic weapon?

After obtaining the Wood Spirit Orb, Mu Yu spent decades deducing and pondering before finally designing the Sword Box, a treasure.

The main material that Mu Yu used to forge the sword box was actually the Xuan Tian Immortal Vine.

If it weren't for the lack of time to create the Xuan Tian Zhan Ling Sword, Mu Yu might have been able to refine the Xuan Tian Zhan Ling Sword in its fruit form, and he might have done something even more outrageous.

However, what Mu Yu is preparing now is already crazy enough in the eyes of Xin Ruyin and Han Li.

Seventy-two golden thunder bamboos were refined into seventy-two sword sheaths, which completely housed the Azure Bamboo Bee Cloud Sword.

Next came the numerous Xuan Tian Immortal Vines, which formed the main body of the sword box.

Refining the Mysterious Heavenly Vine is quite difficult.

It's probably because Mu Yu picked it too recently, and the power of the laws contained in the Xuan Tian Immortal Vine makes it difficult to completely refine it.

But that's alright. The solar essence and the lunar firebird have already completed the initial yin-yang interaction, although the two have not yet undergone a complete qualitative change.

However, under the joint operation of Mu Yu and Han Li, they were able to temporarily unite and form another extremely terrifying flame.

In this way, the Xuan Tian Immortal Vine was purified and refined one by one.

Next, Mu Yu refined the entire Spirit Eye Tree together with the Wood Spirit Pearl, forming a spiritual liquid with terrifyingly concentrated wood-attribute spiritual energy.

Next, the Soul Nourishing Wood was combined with the sword energy stone from the old demon Che from the Valley of Ten Thousand Demons and refined together.

After all the preparations were completed, Mu Yu, with Xin Ruyin's assistance, fused everything together, and after his divine consciousness was shaped, it became the main body of the sword box.

And this is just the beginning.

The most important task in this treasure-refining process is to inscribe the Azure Origin Sword Formation inside the sword box.

In this way, the Azure Bamboo Bee Cloud Sword, which is inside the sword box, is not only constantly being nurtured and grown, but the Azure Origin Sword Formation is also always in a state of being activated.

At that time, Mu Yu will only need to think to spread the Azure Origin Sword Formation engraved inside the sword box.

In this way, Mu Yu completely solved the biggest problem of the Qingyuan Sword Formation—the time required to set up the formation.

The entire refining process lasted a full eighteen years, which is a normal timeframe for refining spiritual treasures.

It's simply a matter of enhancing the spiritual energy within those spiritual materials, and ultimately cultivating the spiritual essence of the treasure.

However, for crafting magical artifacts, this is an astonishingly long time.

Regardless, the Qingyuan Sword Box was completely finished. The Qingyuan Sword Pill was located on top of the box, serving as the core of the entire Qingyuan Sword Box.

The Green Bamboo Bee Cloud Swords, on the other hand, remained securely in their scabbards within their scabbards.

The specific effects of cultivation are still unknown to Mu Yu, as it requires the tempering of time.

However, the other most important function has already been developed by Mu Yu.

In the blink of an eye, the Azure Origin Sword Formation began to unfold with Mu Yu at its center, just like the Azure Origin Sword Formation under normal circumstances.

Limiting his cultivation to around the Nascent Soul stage, Mu Yu engaged in a sparring match with Han Li.

The result, of course, was without any suspense.

Once inside the Azure Origin Sword Formation, even with all his skills, Han Li was restricted in every way.

Of course, if it were a life-or-death battle, Han Li might have a chance to escape from the Azure Origin Sword Formation.

However, Mu Yu, with his early Nascent Soul cultivation, also has a chance to instantly kill Han Li.

Next, Mu Yu restricted his cultivation level to around the Core Formation stage.

This time, Han Li was much more relaxed, but before Mu Yu exhausted his Core Formation stage mana, Han Li still couldn't escape from the Azure Origin Sword Formation.

Regardless of the nurturing of the Azure Origin Sword Box into its own natal magic weapon, the sheer power of being able to set up the Azure Origin Sword Formation at any time is enough to demonstrate the effort put into its creation.

After the treasure was refined, Mu Yu gave Han Li a few Demon Essence Pills as compensation, urging him to focus on cultivation, break through the bottleneck, and become a Nascent Soul stage expert.

However, Mu Yu proposed a different reward scheme for Xin Ruyin...

"A concubine??? Me?"

When Xin Ruyin heard Mu Yu say that he wanted to take her as a concubine, she was completely stunned.

She knew that her looks were only average; she wasn't ugly, but she was definitely not a great beauty either.

Xin Ruyin could not imagine why Mu Yu had taken her in as a concubine.

Could it be that with so many beautiful women around, he wants to try something different?

"That's right. Although there are other reasons, your temperament is enough to make you my concubine."

Mu Yu spoke, but did not mention anything about smuggling himself into the Spirit Realm.

In fact, even without Luo Hou's request to smuggle himself into the spirit world, Mu Yu would have found a time to take Xin Ruyin in.

After all, although Xin Ruyin's appearance was rather ordinary, her temperament was a huge plus.

Not to mention Xin Ruyin's extraordinary talent in formations.

Her talent in formations alone is enough to make Mu Yu accept Xin Ruyin as his concubine.

Although many thoughts flashed through Xin Ruyin's mind, she only thought about Mu Yu's confirmation for a moment before agreeing.

That very night, Mu Yu accepted Xin Ruyin's primordial yin.

In the following months, Mu Yu began to travel around with Xin Ruyin, discussing the principles of formations from time to time.

Even now, Mu Yu can still learn a lot about formations from Xin Ruyin.

It wasn't until the celestial sign that Zi Ling had successfully formed her Nascent Soul that Mu Yu was able to rush back to Huangfeng Valley.

Along with the news of Zi Ling's successful Nascent Soul formation came the news of Mei Ning's failed Nascent Soul formation.

Fortunately, Mei Ning did not have time to experience the tribulation of inner demons after her failure to form her nascent soul; otherwise, she would have faced certain death with no chance of a second chance.

After thinking for a moment, Mu Yu extracted a trace of the true blood of the Wandering Kunpeng from the Kunpeng blood in his hand, preparing to let Mei Ning refine it and try it out.

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