Immortal Palace Longevity

One day later.

Yuan Country, Yuanyang Sect.

Tongtian Peak Cave.

In the training room, Liu Yu sat cross-legged and summed up the gains and losses of this trip.

The reason for this trip was mainly to obtain the fourth-grade spiritual fire and improve the grade of Qingyang Demon Fire.

Since the goal was achieved, even if there was no additional gain, it was a complete success.

However, in order to obtain the spiritual fire, it is naturally impossible to have only one gain by killing a Yuanying Zhenjun.

In addition to the Nine Nether Demon Fire, Liu Yu also obtained two real treasures and all the wealth of the White Bone Demon.

Before leaving the Black Bone Sect, he looted its sect treasury along the way.

Although there were no unexpected surprises, he still obtained a large number of spiritual stones, magic tools, elixirs, talismans, and spiritual herbs and medicines.

Things like spiritual stones and magic tools have little effect on Liu Yu now.

But the Black Bone Sect's hundreds of years of treasures have greatly enriched his reserves of spiritual herbs and medicines.

"Among the spiritual herbs harvested this time, there are even several important auxiliary medicines for refining the "Huanzhen Pill."

"Counting these auxiliary medicines, the spiritual herbs and medicines for refining the "Huanzhen Pill" are almost complete."

"The main medicine "Tianxin Grass" was found by the dead soldiers, and most of the auxiliary medicines were collected through the sect. The remaining ones should be collected in a few years."

"Just polish your magic power, and when the spiritual herbs are collected and the pills are refined, you can start to break through the middle stage of the Nascent Soul."

Liu Yu stroked the storage ring, and thoughts flashed in his mind. Thinking of this, he was in a good mood.

In the past fifty years, he certainly did not fall behind in the way of alchemy.

Through the practice of ripening a large number of spiritual herbs in the Immortal Mansion, and discussing the experience of alchemy with Mo Mei from time to time, his success rate in refining the "Flying Immortal Pill" has reached an astonishing 40% to 50%.

Although he has not yet refined other fourth-level spiritual pills, Liu Yu's alchemy attainments are firmly established in the Grandmaster realm.

As long as the spiritual herbs for the "Return to the True Pill" are collected, he can start refining immediately.

The road to immortal cultivation becomes more and more difficult. Even though he has extraordinary talent for forming a fetus with secret methods, he still inevitably encounters a bottleneck.

Without breaking through the bottleneck, the cultivation cannot continue to improve.

If he spends time and works hard for dozens or hundreds of years to cultivate, Liu Yu is very confident of breaking through.

But the news of the spiritual treasure leaked is like a sword hanging over his head, and he can't let him practice slowly step by step.

He must improve his strength as soon as possible.

Although the news of the Ruined Sword may not be leaked, Liu Yu has no habit of entrusting his own safety to the illusory fate!

So as early as when he got the four pill recipes, he began to collect the spiritual herbs and medicines needed for the four kinds of spiritual pills at the same time.

After all, he controls a Nascent Soul sect and has a group of loyal and devoted warriors under him. Now that decades have passed, he has gained a lot.

"Unfortunately, in order not to expose his identity, he can only give up the Black Bone Sect's spiritual vein."

"Otherwise, if he integrates a fourth-grade lower-grade spiritual vein, the grade of Tongtian Peak's spiritual vein will surely be improved again, one step closer to the fourth-grade upper-grade."

Thinking of the Black Bone Sect's Youyue Mountain spiritual vein, Liu Yu shook his head slightly with some regret.

It takes more than a day or two to migrate a spiritual vein, and the movement is very large, so it is impossible to hide it.

Weighing the pros and cons, he can only give it up, and he doesn't know which old monster will benefit.

"You are still greedy."

Immediately, Liu Yu laughed at himself and cursed himself for being too greedy.

He got the Nine Nether Demon Fire and all the wealth of the White Bone Demon. He also got several important auxiliary medicines for refining the "Return to the True Pill" by accident, but he still didn't know how to be satisfied.

With a slight smile, Liu Yu turned his eyes and looked at the things placed in front of him.

They were a bone knife made of unknown bones, a white gem the size of a goose egg, and a ring as black as ink.

It was the bone knife treasure, white gem and storage ring of the White Bone Demon.

"With space attributes, this bone knife is quite extraordinary."

"Not only is it powerful in attack, but it can also play an unexpected role at some critical moments."

Liu Yu picked up the bone knife treasure and looked at it carefully.

The flying speed of the magic weapon is extremely fast, far exceeding the speed of the cultivator, but no matter how fast it is, it can never be faster than space movement.

The bone knife treasure has space attributes and can move in space and appear at any position within a certain range.

At critical moments, it can be used as a surprise move.

"It is indeed a good magic weapon for killing and arson."

"To refine this treasure, the White Bone Demon must have spent a lot of effort."

"But now it belongs to Liu."

Gently stroking the bone blade and feeling the uneven texture, Liu Yu found a line of small words on the handle.

"White Bone Sky-Splitting Knife"

As expected, this is the name of this knife.

Liu Yu followed suit and had no idea of ​​renaming it, so he would call it this in the future.

"This knife has rare properties."

"Although I already have the Sunset Golden Rainbow Spear for attack, I can still keep it for use."

After taking a few glances, he put the "White Bone Split Sky Knife" aside, intending to keep it for his own use.

Immediately, Liu Yu picked up the white gem again and found three small words on it - Yinming Pearl.

In theory, defensive treasures should be rarer than offensive treasures.

But in terms of defense, he already has the "Red Flame Shield", which is very consistent with his own properties.

In terms of quality, Yinming Pearl is not better than the Red Flame Shield. Because it is a Yin-attribute treasure, Liu Yu can only exert about 70% of its power after refining it.

It has no rare characteristics, its quality is not as good as the Red Flame Shield, and it is not compatible with his properties.

In this case, Yinming Pearl seems a bit useless.

Liu Yu thought for a while and gave up the idea of ​​sacrifice, intending to save it for future exchange with other true kings.

After all, in terms of defense, he already has a lot of means. Whether it is "Yuxia Armor" or "Red Flame Shield", their defensive power is very good.

Moreover, if one has reached the fourth level of body refining, it is not a problem to resist some fourth level spells.

After thinking about the uses of the two real treasures, Liu Yu began to refine the jet black storage ring. Since the old demon with bones was dead, the sacrifice went very smoothly.

Easily erase the brand of spiritual consciousness, remove the mana aura from it, and then put your own brand on it.

With a thought in his mind, Liu Yu probed his consciousness into the dark storage ring with some expectation.

However, this look was a huge disappointment.

In addition to a large number of spirit stones, the most important thing in the Old Bone Demon's storage ring is the material for refining corpses and ghosts.

For example, corpses, living souls, etc.

The corpses and living souls were all processed and put away neatly, but not many spiritual herbs and materials were seen.

"With such a net worth, not only compared to myself, but even compared to ordinary early True Lords, it is inferior."

After reading it, Liu Yu was a little disappointed.

He has no intention of studying the corpse path anymore. With the rapid growth of his strength, even the "Ten Thousand Soul Banner" has been useless for a long time.

Therefore, it would be a pity for him to discard the large number of corpses and souls in the storage ring if they were tasteless.

"Leave it to Qiu Shui."

Thinking about it, Liu Yu quickly figured out how to deal with the souls of these corpses.

He could probably guess why the Bone Demon was so poor.

In order to break through to the mid-level realm, a large amount of resources must be consumed, and coupled with the need to increase the combat power of the Bone Snake Corpse Refiner, I am afraid that most of this person's net worth has been emptied.

As a result, there will naturally not be many good things left.

After counting the loot, Liu Yu did not rush to practice the "Bone-Splitting Sky Knife", but put away the three items one by one.

Then, the storage ring flashed, and a jade box made of thousand-year-old black ice appeared in front of him instantly.

"Click"

After tearing off the spirit-sealing talisman, the jade box opened with a soft sound.

A faint blue flame was motionless in the jade box. It took a long time to beat slightly, and it was in a sealed state.

It is the Nine Nether Demonic Fire!

"With the disciples of the sect and the dead men under them, collecting the flesh and blood of monsters is not a problem."

"Once the Qingyang Demonic Fire is promoted to the fourth level, it will be able to obtain a large amount of fuel to increase its power."

"By then, the power will be extremely impressive, so the faster the promotion, the better."

With all kinds of thoughts flashing around, Liu Yu fired a burst of magic power and controlled the blue flame to float in front of him.

Without the suppression of the spirit-sealing talisman, as soon as it left the Xuanbing Jade Box, the Nine Nether Demon Fire accelerated its beating speed, emitting high temperature and slowly reviving.

"Zizi~"

You can clearly feel that it is becoming active.

Without further ado, everything was ready, and Liu Yu immediately started to promote the Demon Fire.

He held the spell firmly with both hands, and immediately fired out dozens of spells, falling into the blue flames one after another.

"boom!!!"

In an instant, an extremely powerful force naturally emitted from the blue flame the size of an adult's head.

This level of power clearly exceeds that of many true treasures, easily reaches the fourth level, and is comparable to some true kings.

As if being stimulated by some kind of stimulus, the flames of the Nine Nether Demons became brighter and brighter, and beat more frequently.

In the space, the fire-attribute spiritual energy that permeated everywhere began to become active.

As the creator of the secret technique, Liu Yu is naturally extremely familiar with the "Nine Transformations of Demonic Fire".

Immediately, he took the first step in an orderly manner, and played out the magic formula one after another without any hurry.

As the spells were fired one after another, the stimulation of the Nine Nether Demonic Fire became stronger and stronger, and its power slowly climbed upwards, reaching a level that was intimidating to low-level monks.

At the same time, wisps of extremely pure milky white spiritual power also spilled out from the flame the size of an adult's head.

These strands of spiritual power may seem small, but in fact their "quality" is very high.

Similar to the mana in the Nascent Soul stage, it is similar to the mana in the Qi refining stage.

The total amount of spiritual energy contained in a ray of mana of the former may far exceed the sum of all the mana of the latter.

Without the restraint and control of the spiritual fire, the hair-like milky white spiritual power directly changed from order to disorder.

As soon as it appears, it changes from high quality to low quality.

"Rumble"

In a short period of time, a storm of spiritual energy appeared in the training room, sweeping through every corner.

Soon, atomization appeared naturally.

The hair-like milky white spiritual power turned into a massive amount of heaven and earth spiritual energy, making the spiritual energy storm intensify.

Seeing this, Liu Yu took out the cave token and immediately activated the spirit gathering array.

"Buzz~"

On the ground, arrays of formations lit up rapidly, absorbing the mist of spiritual energy that filled the space.

This prevented the spiritual energy storm from continuing to expand.

However, because the Nine Nether Demon Fire is still releasing spiritual power, the spiritual energy storm has no intention of dissipating in a short period of time.

In order to force out the source of spiritual fire, it is natural to release most of its spiritual power so that its power is weakened to the minimum.

Having performed the "Nine Transformations of Demonic Fire" secret technique three times, Liu Yu was very familiar with the entire process and was not surprised at all when seeing this scene.

From time to time, he would cast a spell and watch quietly as the power of the Nine Nether Demonic Fire increased, and it continued to release massive amounts of spiritual energy.

The fourth to sixth levels of spiritual fire correspond to the early stage of Yuanying to the late stage of Yuanying.

However, due to the special nature of spiritual fire, even fourth-grade spiritual fire may pose a threat to the great monks.

The level of rarity far exceeds that of ordinary real treasures.

This kind of high-level spiritual fire, the spiritual energy contained in it can already be described as a vast amount.

Releasing it in such a "gentle" way, it is not something that can be finished in one or two days.

Under the effect of "Nine Changes of Demonic Fire", strands of milky white spiritual power continue to overflow from the Nine Nether Demonic Fire, turning into a vast amount of low-quality spiritual energy.

The spiritual energy naturally atomizes, forming a large-scale spiritual energy storm, but under the effect of the gathering spirit array, it can never continue to expand.

Time passed by minute by minute, and after about seven days and seven nights, the power of the Nine Nether Demonic Fire reached its peak.

Then, it began to slowly decline.

After seven days, the milky white spiritual power that emanated from it gradually became scarce, and the scale of the spiritual energy storm slowly decreased.

It was not until half a month later that the power of the Nine Nether Demonic Fire declined to the extreme, and it took a long time for a wisp of high-quality milky white spiritual power to float out.

"Almost."

Liu Yu flashed this thought, and immediately flipped his left palm.

"Puff~"

The next moment, a deep blue flame emerged from his palm.

Deep blue, light blue, light red, pure white.

In a short moment, the color of the Qingyang Magic Fire changed successively, representing all the characteristics it now possessed.

Growing to the peak of the third grade, it swallowed three spiritual fires one after another. This fire already has three characteristics.

They are: the "plant affinity" of the Qinglian Spiritual Fire, the "burning flesh and blood" of the Mantuo Blood Flame, and the "power of desire" of the Impermanence Heart Flame.

Controlling the Qingyang Magic Fire, it slowly floated to the vicinity of the Jiuyou Magic Fire, and the two spiritual fires were less than a foot apart.

"Fast"

Seeing that the time had come, Liu Yu's hands pinched the magic formula faster and faster, and even afterimages appeared.

Hundreds of magic formulas condensed into a three-inch red seal.

As he pointed out, the red seal fell into the dark blue flame in an instant, and the power was weakened to the extreme. The Jiuyou Magic Fire was unable to resist.

"Zizizi"

Although the dark blue flame surged violently, due to insufficient spiritual power, its power did not increase at all.

On the contrary, as the red seals entered one after another, its shape began to become unstable.

Finally, after the ninth red seal fell, a very special dark blue spiritual light floated out from the Nine Nether Demon Fire.

The origin of the spiritual fire!

This dark blue spiritual light was extremely special. As soon as the fire attribute spiritual energy in the space appeared, it spontaneously gathered towards it.

If it continues to absorb spiritual energy, based on this spiritual light, it may become another "Nine Nether Demon Fire" in time.

But because of insufficient origin, the grade may only be one or two.

Under Liu Yu's control, this dark blue spiritual light slowly floated into the green flame next to it.

Immediately, he used the "Nine Changes of Demon Fire" to assist the Qingyang Demon Fire in absorbing and digesting this origin.

"Zizizi"

After absorbing a little dark blue spiritual light, the fist-sized deep green flame surged violently, visible to the naked eye.

The body became a little unstable, and its essence began to change.

However, under Liu Yu's control, there would be no accidents.

One breath, two breaths, three breaths.

About three hours later, this spiritual light was perfectly absorbed.

The Qingyang Demon Fire, which had already reached the peak of the third grade, obtained the origin of the fourth grade spiritual fire and began to advance to the fourth grade.

It can be seen with the naked eye that the spiritual light, which was originally a deep green, began to be stained with a little blue.

The first refining was successful, and the next thing was naturally a matter of course.

Under Liu Yu's keen spiritual perception, there would be no mistakes.

The Nine Nether Demon Fire, which was insufficient in spiritual power and had lost part of its origin, was even more unable to resist Liu Yu's control.

It could only let itself be slaughtered and weakened step by step.

...

Seven days later.

"Bang~!"

The Nine Nether Demon Fire, which had lost most of its origin and was extremely weak, finally could not maintain its form.

It exploded with a loud bang and turned into blue flames.

Although the training room was extremely rich in spiritual energy, the blue flames could not be stopped from extinguishing one after another in the next few breaths.

In the end, this Nine Nether Demon Fire completely dissipated between heaven and earth.

Perhaps it was the limitation of the rules of the Great Dao that it was impossible for two identical fourth-grade spiritual fires to appear between heaven and earth at the same time.

Only when the old spiritual fire dissipated could a new spiritual fire be born.

Perhaps by chance, after tens, hundreds or even thousands of years, a new Nine Nether Demon Fire would be born.

It's just that the newly born spiritual fire is no longer the same as before.

However, the sound of the burning flame in the training room did not disappear with the disappearance of the Nine Nether Demon Fire.

"Zizi~"

Beside the Nine Nether Demon Fire before it dissipated, a fist-sized deep blue flame was slowly jumping and burning.

The blue flames shone in all directions, and this spiritual fire was as powerful as a rainbow, and it really reached the fourth-grade level.

Compared with the Nine Nether Demon Fire in its heyday, its power is not much less, and there is still a lot of room for improvement after just being promoted.

It was the Qingyang Magic Fire that had reached the fourth level!

"Fourth level."

Looking at the deep blue flame, Liu Yu smiled.

Through the close connection between his mind and spirit, he was very sure that the Qingyang Magic Fire had reached the fourth level.

And because of the tailor-made "Nine Changes of Magic Fire", it could continue to rise in the future.

Liu Yu waved his hand lightly, and the Qingyang Magic Fire moved with it, returning to the palm of his hand to beat and burn.

His spiritual sense spread out, and he could clearly feel that under the influence of the Qingyang Magic Fire at this time, the surrounding fire attribute aura became much more active.

"In terms of the activity of fire attribute aura, Qingyang Magic Fire is slightly inferior to Jiuyou Magic Fire in this aspect."

"However, the difference is not too big."

"Due to the accumulation of the first three changes, the fourth change of the Nine Changes of Magic Fire will have a great improvement and can more completely inherit the characteristics of the original spiritual fire."

"In terms of influencing fire attribute aura, it should be able to have 90% of the effect of Jiuyou Magic Fire, which is already a great improvement."

After observing for a while, Liu Yu came to a conclusion in his heart and nodded slightly with satisfaction.

"This characteristic that can enhance the activity of the surrounding fire attribute aura will be called "flame enhancement" in the future."

"Plant affinity, burning flesh and blood, power of desire, flame enhancement."

"Not bad, not bad."

Giving a simple name to the characteristics, Liu Yu looked at the promoted Qingyang Magic Fire with bright eyes and a good mood.

As for why the color is not dark blue when exerting the "flame enhancement" characteristic, this is insignificant.

After all, Qingyang Magic Fire is not going to completely copy Jiuyou Magic Fire and does not inherit all its characteristics.

Immediately, his mind moved.

The next moment, the Qingyang Demon Fire became blurred, and the color changed between dark blue, light blue, light red, pure white, and dark blue, and even five colors appeared at the same time.

The Qingyang Demon Fire after being promoted changed into various forms under Liu Yu's control, and tested many changes after the fourth grade.

At this moment, there was a sudden movement from the storage ring.

"Hmm?"