In the aura cave of the nine-headed blood python, the leader of the flying winged demon snake was bored on Ye Feng's side, and it couldn't figure out how the master who was originally the same as water and fire suddenly became one with this human being, not only letting the other party cultivate in the master's lair, but also letting himself protect the Dharma on the side.

The leader of the demon snake accepted this task angrily, and several times wanted to secretly get rid of the human in front of him who made it hate to the bone, but whenever it got up and was about to make a move, it remembered the terrifying appearance of the master when he was angry, and his heart was even more wildly beating, and he stopped in a panic.

Ye Feng, who didn't know anything about the dangers he might face, frowned, and devoted himself to the cultivation of the innate spirit induction technique, and finally found a second place where the spiritual energy was abundant, and he would never let go of this rare opportunity.

The fingers were regularly pinched, with Ye Feng as the center, and a small silver vortex gradually rose, and under the guidance of the qi machine, the surrounding aura finally began to move, making a whistling sound.

"Could it be that the wind is blowing?" The leader of the demon snake noticed the abnormality, and cautiously stepped aside, cautiously staring at Ye Feng, who kept making strange gestures.

The whistling sound was in his ears, but the demon snake leader didn't feel a hint of breeze.

The aura in the aura cave was constantly converging towards Ye Feng, and the aura in Ye Feng's body was rising steadily, and the aura that was originally surging towards him like a bubbling stream gradually became turbulent and rushing.

After the refining of the innate spiritual channel, the efficiency of the transformation of the spiritual energy into spiritual power was extremely obvious, and even the residual spiritual power in the meridians gave way to itself and returned to the dantian.

The qi machine was running wildly, and the speed at which the spiritual energy poured into the body was getting faster and faster, Ye Feng's frowning brows gradually eased, and he felt the powerful power constantly pouring into his body.

In the Spiritual Qi Cave, the tall trees were windless, and some small beasts hidden in the depths of the grass were scurrying around in panic, and the silver halo generated by the fluctuation of the Spiritual Qi rippled around the entire Cave.

Witnessing the strange scene around him, the leader of the demon snake was so surprised that he couldn't close his mouth, and the aura surged wildly, although it couldn't see it in person, it could feel the terrifying deterrent power contained in it.

The leader of the demon snake subconsciously pushed away again, letting out a strange "sizzle" scream.

Ye Feng, who had all his five senses, was indifferent, his hands kept flipping like wheels, and the spirit gathering technique that he was familiar with by heart was played out in a row, and the surging aura like a giant Lang kept hitting him wave after wave.

The silver halo shrouded in front of Ye Feng became brighter and brighter, and the dazzling silver brilliance swaggered the pitch-black cave mansion like day, Ye Feng, who was in the vortex of aura, frowned again with soothing, and he faintly felt that the aura in his body seemed to be a little uncontrollable.

However, Ye Feng was not worried, he was no stranger to today's scene with breakthrough experience.

Ye Feng felt a burst of ecstasy in his heart. The aura here, both in quantity and quality, was greatly beyond his expectations, and back then on the earth, it was only by relying on the spirit gathering array that such a rich aura could be condensed.

This is a sign of breaking through the fourfold realm of the middle stage of qi refining and opening up the Mud Pill Palace in the brain!

Mud Pill Palace, which belongs to the source of cultivation of qi refiners, is the ultimate destination of spiritual power.

Cultivating Immortal Qi Refiners, when they are in the first three layers of Qi refining, they can't even be called real Qi Refiners, because Qi Refiners at this stage can't open up the Mud Pill Palace in the brain, and can only store spiritual power in the zài meridians.

Only the Qi Refiners who have opened up the Mud Pill Palace and can store their spiritual power in it can be regarded as real Qi Refiners.

"The spiritual power in the meridians is saturated, it is suitable for impacting the Mud Pill Palace!" Ye Feng's expression was solemn, knowing whether he would succeed or not.

Under the guidance of the innate spiritual induction technique, Ye Feng's qi penetrated deep into the meridians, pulling the spiritual power in the meridians, slowly flowing along a certain trajectory, converging towards the brain.

Ahead, the fog is misty, and it is the place where the soul is nurtured - Mud Pill Palace.

A thick mist enveloped the perimeter of the Mud Pill Palace, resisting all the unknown forces that dared to invade.

This is derived from the self-protection ability of the human soul, the soul is the foundation of man, and the spiritual attack of some evil spirits relies on a strange power to directly break through the fog defense of the Mud Pill Palace and destroy the human soul.

It is not difficult to open up the Mud Pill Palace, in fact, the martial artists of the Shenwu Continent, when they cultivate to the peak of the Gangwu Realm, they have to rely on their own Xuan Power to open up the Mud Pill Palace and impact the Shenwu Realm where heaven and man are one.

The Xuan Force is violent and uncontrollable, and is rejected by his own divine soul, and ordinary martial artists, only when they have cultivated to the peak of the Gang Martial Realm and can manipulate the Xuan Force in their bodies to the extreme, can they rely on the Xuan Force to impact the Mud Pill Palace, otherwise it is very likely that they will not be able to control the Yuan Force, and they will damage the Divine Soul and go mad.

The spiritual power cultivated by immortal cultivators is easier to control than the Xuan power cultivated by martial artists, and the spiritual power itself is not exclusive to human spirits, so it is often in the early stage of cultivation that the Mud Pill Palace can be opened.

With the continuous influx of spiritual power, the swelling pain in Ye Feng's head gradually became obvious, until all the spiritual power was gathered in the meridians of his brain, and Ye Feng couldn't help but roar in pain.

"Break!" Ye Feng finally launched the first round of impact on the Mud Pill Palace.

The spiritual power swarmed and rushed wildly towards the mist in front of him, and the Mud Pill Palace wrapped in the mist trembled, and Ye Feng quickly felt the pain from the depths of his soul.

It is also an inner person who can absorb too little spiritual energy on weekdays, and the brain meridians and the mud pill palace have not been able to get enough spiritual power to nourish them, and the mud pill palace has not even adapted to the storage of spiritual power, otherwise the breakthrough in the middle stage of qi refining will not be so painful.

"Good guy, it's a hundred times more painful than breaking through the middle stage of qi refining on the earth!" Ye Feng sweated like rain, a fourfold breakthrough in the middle stage of qi refining made him suffer so much, thinking of the later stage of qi refining and even the foundation building period in the future, Ye Feng couldn't help but feel a chill.

But he won't stop there, once the Mud Pill Palace is opened, the spiritual power in his body can be connected to the outside world, and even if the spiritual power is exhausted in the future, he can slowly recover.

Although the aura of the outside world is thin, it is better than nothing, and after the Mud Pill Palace is opened up, Ye Feng will use the innate spirit attraction technique to absorb the spiritual power of the outside world several times faster.

"Bang bang!" There was an explosion in his mind, and a tearing sensation swept through his body, Ye Feng's facial features were already twisted together because of the intense pain, and the demon snake leader on the side was shocked.

"What kind of cultivation is this kid, why is he so guilty?" The leader of the demon snake muttered to himself in his heart, seeing that the muscles of Ye Feng's whole body kept trembling, and there were bursts of explosions on his body, he couldn't help but feel a little surprised and happy in surprise.

"If this kid dies practicing the exercises, it will be a good thing, but I don't know if the master will blame me. ”

The demon snake leader's careful thinking, how could Ye Feng know that he was now anxiously mobilizing the spiritual power of his whole body, and launched one impact after another on the impregnable Mud Pill Palace.

Every time he impacted, Ye Feng was like being struck by lightning, as if a violent current swept through his body, making him miserable, but Ye Feng couldn't stop at all, because once the impact stopped, the fog around the Mud Pill Palace would close again, and his previous efforts would be wasted.

After half an hour of continuous impact, half of the spiritual power in his body had been consumed, and Ye Feng finally slowly adapted to the severe pain that kept sweeping his body, of course, this was also because he refused to slack off at all, and after continuously impacting the Mud Pill Palace, the fog around the Mud Pill Palace gradually accepted the spiritual power.

With another impact, the spiritual power surged like a galactic discharge, and this time, the mist of the Mud Pill Palace finally stopped resisting, and separated a path on its own, allowing Ye Feng's spiritual power to successfully enter the Mud Pill Palace.

"Boom!" There seemed to be a sudden thunderstorm in his mind, and Ye Feng's eyes suddenly brightened, and the bubbling spiritual power finally successfully poured into the mud pill palace the size of an egg.

"Qi refining fourfold, success!" Ye Feng was so excited that he almost wanted to shout.

With the influx of spiritual energy, Ye Feng's spiritual thoughts also successfully penetrated into the Mud Pill Palace, making him feel as if he was here.

In the Mud Pill Palace, there was chaos, and the surroundings were completely foggy, and under the restriction of fog, the space that spiritual power could have was extremely narrow.

Opening up the Mud Pill Palace is only the first step for immortal cultivators, and in the following days, as the cultivation progresses, the spiritual power slowly grows, and the space of the entire Mud Pill Palace will slowly expand, and when the spiritual power in the Mud Pill Palace condenses to a certain level and begins to turn into a whirlpool, it is the day when Ye Feng steps into the foundation building.

Of course, this qiē is still extremely far away, and what Ye Feng has to do now is to let the aura in the Mud Pill Palace open up enough space in it to completely stabilize this realm.

"The Mud Pill Palace has been successfully opened, it's time to absorb more aura!" Ye Feng once again struck out the Spirit Gathering Hand, preparing to completely absorb the remaining auras in the Auronic Cave Mansion!

The silver vortex that surrounded Ye Feng's body reappeared, and it was even larger and more rapidly rotating than before.

After opening up the Mud Pill Palace, with the support of the divine soul, Ye Feng's spirit gathering technique has also undergone a transformation, and the effect of absorbing spiritual energy has become more and more significant!

In the Reiki Cave, the silver pit that symbolizes the aura gathers from all directions, and the trees, flowers, birds, and beasts that grow in the cave gradually become sluggish, living in the Reiki Cave all year round, they more or less absorb some of the aura, which is also the reason why the trunk of ordinary trees is as hard as steel.

However, under Ye Feng's new spirit gathering technique, all the animals and plants in the cave that had absorbed the spiritual energy, but could not transform and use it, were forced to contribute the spiritual energy again.

"Boom!" The silver horse practice was like a long rainbow running through the sun, extremely spectacular, and the leader of the demon snake on the side was frightened, faintly giving birth to a sense of foresight.

"My strength, it seems to be draining?" Because he didn't practice the Immortal Dao**, the aura that the demon snake leader who lived here inadvertently absorbed on weekdays was taken away by Ye Feng.

It is precisely because of the existence of these auras that the strength of the leader of the fifth-order flying winged demon snake is even comparable to that of the sixth-order demon beast.

"Don't, don't!" The Winged Demon Snake was terrified and fled in all directions in the cave, but no matter where it fled, the loss of strength in its body was still inevitable.

"What**, it's so terrifying!" The Flying Winged Demon Snake also noticed that many birds and beasts that were originally alive and well had also become sick, and as for the towering giant trees around them, their body shape had obviously begun to shrink.

"If this continues, won't I be sucked alive by this kid and turned into a snake, no, I must kill this kid!"