Within the dantian, the high-speed cyclone formed by the Soul Devouring Demon Fire was like a bottomless abyssal black hole, greedily and frantically swallowing the rolling torrent of spiritual energy, and increasing and growing at an extremely obvious speed, this was not like normal cultivation at all, but unreasonable devouring and plundering.

It was only a few dozen breaths, and the mist around Qi An was absorbed, all of which entered Qi An's body, and poured into the dantian along the meridians, all of which became the rations of the Spirit Devouring Demon Fire, and then the earth vein aura that was attracted by the Spirit Gathering Array was also swallowed as soon as it appeared, which was terrifying.

"This ...... This is...... What's the situation?"

Qi An was shocked and lost his voice in shock, this cultivation speed was completely beyond his imagination, it was really too fast, amazingly fast!

After pondering for a while, he finally figured out that he was slowly entering the realm of Qi refining, not because of his lack of talent, but because he did not have a good aura environment.

You must know that in most places, the Heaven and Earth Yuan Qi is relatively thin, which greatly restricts the growth of the Spirit Devouring Demon Fire, if it is in an environment with strong spiritual energy, the efficiency of Qi An's Qi refining will be terrifyingly high, which can be called against the sky.

The Soul Devouring Demon Fire is like a giant whale, it can swallow thousands of small fish and shrimp in one bite, but it is trapped in a small pond, with only two or three fish and shrimp around it.

At the beginning, in the depths of the Broken Soul Slope, Qi An mistakenly took Zhu Guo and almost exploded, but in the end, he was blessed by misfortune and successfully gathered qi to condense the truth, and inexplicably and wonderfully refined the Soul Devouring Demon Fire and transformed it into a Soul Devouring Cyclone. At that time, if he hadn't been in a hurry to leave and stayed in that place where the spiritual energy was rich and cultivated for a while, he should have been able to detect the terrifying cultivation speed of the Spirit Devouring Cyclone, but because he was extremely afraid of the dog demon Lao Hei, he just tested the Seven Absolute Sword Qi and hurriedly slipped away, missing the opportunity to improve.

After leaving, the Heaven and Earth Yuan Qi became thinner, and the growth of the Spirit Devouring Demon Fire was extremely limited, like a dragon swimming in shallow water, like a whale trapped in a lotus pond, and being in a state of hunger for a long time, which led to the slow entry of Qi refining, which was far inferior to the refining body.

And that time in Xiangfan City, Qi An used the Spirit Devouring True Qi to devour the pill and the Yuan Zhu for cultivation, only to find for the first time that it could grow rapidly under certain circumstances, just because the pill and the Yuan Zhu are both precious cultivation resources, and they are gone when they are used up, only Qi An's Qi refining realm has been raised from the early stage of Qi condensation to the middle stage of Qi Condensation, and it is impossible to continue, although Qi An was happy at that time, he also lamented that the price was too high, not enough as a regular cultivation method, so he did not attach too much importance to it.

Today, Qi An came to this earth-centered cultivation room, tried to run the Seven Peerless Exercises, and finally felt shocked again, only then did he understand that the slow refining of qi was not because of too much appetite, but because there was too little food, once there was enough heaven and earth aura, the Soul Devouring Demon Fire could grow rapidly.

With this realization, Qi An was not only surprised, but also excited, because this is the earth's core cultivation room, it is a holy place for refining qi, there is a spiritual vein deep under the ground under his feet, and the spiritual energy can be said to be inexhaustible, inexhaustible, he only needs to pay a certain amount of yuan beads, he can suck desperately, suck hard, maybe he can feed the giant whale of devouring spirit demon fire.

This is like some restaurants in the world, which do not charge according to the dish, but charge per capita, pay once and let you eat a full meal, how much you can eat depends on how big your belly is.

The same is true of the Earth's Core Cultivation Room, if you pay enough Yuan Zhu, you will be given a one-day time limit, as for how much earthly vein aura you can absorb, it depends on your own ability.

Qi An wants to fatten up the Spirit Devouring Demon Fire, this is the most suitable dream treasure land, just devour it fiercely for one day, and the Spirit Devouring True Qi in his body can grow to an extremely amazing point.

Qi An was looking forward to it, and even wanted to stand up and dance with his hands so excited!

But obviously, this third-layer cultivation secret room is far from satisfying the appetite of the Spirit Devouring Demon Fire, although the aura is much richer than the outside world, it is still in short supply, once Qi An runs the Qi Refining Method, the original large amount of aura remaining in this secret room is quickly devoured, and then the aura attracted by the Spirit Gathering Array also enters his body as soon as it emerges, which is completely insufficient, he needs more aura!

"I'm going to the ninth layer at the bottom! only there, can it be possible to make the Soul Devouring True Qi grow the fastest!"

This thought suddenly popped into Qi An's mind, and it was out of control.

Although he didn't know how much stronger the concentration and generation speed of the ninth layer's spiritual energy could be compared to the third layer, it was definitely a lot higher, and it was more suitable for cultivating the Soul Devouring True Qi.

In fact, it is no longer appropriate to use "cultivation" to describe it, and it is more appropriate to describe it as "feeding".

The Soul Devouring Demon Fire is like a gluttonous beast that can't get enough to eat, all kinds of aura are its rations, Qi An doesn't need to deliberately guide the aura into the body with his mind, he only needs to urge the Spirit Devouring Cyclone to run at high speed without a brain, and it can turn into a bottomless vortex similar to the Black Wind Abyss, frantically devouring and devouring the aura outside the body.

The true qi vortex in the dantian can be reversed or reversed, and the effect is completely opposite.

When cultivating, the cyclone rotates forward, absorbing spiritual energy, and strengthening one's body, and during battle, the cyclone reverses and releases true qi for the enemy.

A long time ago, Qi An discovered that the Spirit Devouring Cyclone had the characteristics of self-cultivation, and it was able to actively swallow the Heaven and Earth Yuan Qi from the outside world and grow on its own, but because most of the time, the Heaven and Earth Yuan Qi in the outside world was very thin and free, resulting in the effect of this self-cultivation was not obvious.

And if it is in an environment with sufficient spiritual energy, this self-cultivation characteristic is very terrifying, Qi An no longer needs to care about the cultivation exercises, as long as he makes the Soul Devouring Cyclone rotate at high speed, he can swallow a large amount of external spiritual energy, achieving an unprecedented cultivation effect.

Although the leyline aura in this third-layer cultivation room was sufficient, it couldn't help but swallow the Spirit Devouring Demon Fire, and it was quickly swept away, and it was still unfinished.

Qi An has already paid the rental fee for one day, it only took two hours, and there are ten hours left, if he goes out immediately to change to the ninth layer, not to mention wasting the Yuan Bead, it may also arouse suspicion, it is better to cultivate here, and go to the ninth layer in the depths tomorrow, there is no need to rush for a while.

In this way, Qi An suppressed his excitement, tried his best to calm his mind, and returned to the body refining method to start cultivating, absorbing qi into the body and refining the body.

Because the aura generation speed here is limited, if it is used for refining qi, the supply exceeds the demand, and the speed is limited, but it is better to use it for refining the body, which is more than enough to achieve the best effect. Only when I go to the ninth layer tomorrow and then turn to qi refining will it be a reasonable application and the most cost-effective.

Once the monk meditates and cultivates, he feels that time flies very quickly, as if he closes his eyes and opens them again, ten hours have passed.

"Jingle Bell ——!"

The small copper bell hanging in the room automatically made a crisp sound without wind, reminding the cultivators in the room that the rental time had arrived.

At the same time, the closed stone door silently slid to the side, the door opened widely, and Qi An also opened his eyes at this time and got up.

This day and night of meditation is extremely efficient, and the cultivation speed is seven or eight times that of the usual time, but it is a pity that the time is too short, although it has improved a lot, but there is still a long way to go before the golden body is perfected.

Qi An didn't dare to stay on purpose, not to mention that he couldn't forget the ninth floor of the underground floor, so he quickly got up and walked out of the cultivation secret room, walked up the rotating stone steps step by step, and soon came to the empty octagonal stone hall again.

"Senior!" Qi An walked up to the majestic-looking stone-skinned old man and saluted with his fists.

"What's the matter?" the stone-skinned old man opened his eyes and looked at Qi An.

"The junior wants to go to the bottom ninth layer to cultivate for a day. Qi An was respectful and earnest.

"What?" the stone-skinned old man's eyes widened, thinking he had misheard, "Do you know how much the ninth floor is rented?"

"The younger generation has calculated, and it takes 6,400 yuan beads to rent for a day. Qi An said as he reached into the storage bag, and a large number of Yuan Zhu appeared in his hand.

The old man with stone skin didn't pick it up, but said: "The old man still has to remind you, with your realm and strength, four or five layers are enough, and it is really unwise to rent the ninth layer at such a big price." ”

Qi An smiled awkwardly, but it was not easy to explain, so he could only say perfunctorily: "The juniors have no shortage of Yuanzhu at hand, they just want to experience it, and I hope that the seniors will be perfect!"

The stone-skinned old man looked at Qi An carefully, but seeing that he was young, just a teenager, but there were two horizontal bars on his chest, showing that his strength was extraordinary, he mistakenly thought that he was a genius descendant of a certain Xiuzhen family in Qingzhou, and it was estimated that he was favored in the clan, and there was no shortage of yuan beads, so he dared to be so extravagant and wasteful.

So the old man didn't stop him, and accepted a large number of yuan beads transferred from Qi An, but as soon as his divine sense was swept, the number was clear, and the score was exactly right.

While the passage down was not closed, the stone-skinned old man waved his hand at Qi An, and said with a complicated look in his eyes: "Go!"

Qi An bowed his hand slightly, without much nonsense, turned around with excitement, and strode towards the stone staircase passage, all the way down.

This entire geocentric cultivation room, or the geocentric cultivation tower, is completely built underground, with a depth of more than 100 zhang, the deeper it goes, the higher the concentration of spiritual energy, and when it reaches the ninth layer, it is like being in a sea of spiritual energy, and even the line of sight will be blocked, and the surrounding area is white and vast, like a cloud and mist fairyland.

The space on the ninth floor was narrow, and there were only four cultivation secret rooms, each facing one side, only one of which was tightly closed, and the other three were all wide open and unused.

For this mysterious person who can cultivate at the ninth layer, Qi An didn't know who it was, and guessed in his heart that he might be one of the three major Rongyuan real people in the Sword King Mansion, if he cultivated only to refine the God Realm, he didn't need to use the ninth layer.

Of the three secret rooms, you can choose one, and Qi An chose the opposite side of the person.

After entering, the stone door closed automatically, leaving only a vast white mist full of the room, all of which was extremely dense of earth vein aura, which was full of light, almost turning into raindrops, making the entire secret room feel slightly moist and damp.

The Spirit Gathering Array in the stone chamber is also a circular stone platform, but the area is larger, and the runes engraved on it are much more complicated, and the effect is obviously better, far surpassing the Spirit Gathering Circle on the third layer.