"Demon Refining Battle! What is this? ”

Nie Fei's brows furrowed slightly, he didn't seem to have heard of this exercise, let alone anyone who practiced it.

"I don't know what this exercise is, the exercises in the Demon Heart Sutra shouldn't be too bad!"

Nie Fei thought about it, closed his eyes, and began to carefully comprehend the demon refining decision that had just appeared in his mind.

Although he said this, Nie Fei had a faint feeling in his heart that this demon refining was definitely not ordinary, and it was even stronger than the exercises he had seen before.

As soon as his mind moved, the mental method of refining the demon duel appeared in his mind, and it was clearly visible, as if the runes were carved in his mind, and he couldn't forget it.

Word by word, carefully studying the Demon Refining Decision, Nie Fei's expression changed from the original calm to moving, and then became extremely frightened.

"This exercise is absolutely against the sky. ”

Nie Fei's heart shook, and he let out a long breath, his eyes flashing with a complicated look.

The Demon Refining Decision is actually very simple, it is a mental method for refining aura, but it is different from the common mental method, the demon refining duel is to treat the entire heaven and earth as a spiritual energy furnace, and the soul of all things is used as spiritual energy to refine, and transform it into demonic energy in one's own body.

Everything has a spirit, a flower and a plant, a stone, after a long time, it will still be transformed into a monster, and the refining of demons is to refine the soul life essence of all things, and then refine it into the aura of heaven and earth to supplement it into one's own body.

There are really too few exercises like this that treat heaven and earth as a furnace of spiritual energy, or even unique, at least Nie Fei has never heard of this kind of exercise.

The general cultivation method is only to absorb the aura of heaven and earth, or to quickly gather the aura from a distance and integrate it into the body, it is simply impossible to extract the aura and even the essence of life from all things in heaven and earth anytime and anywhere like the demon refining decision, and even as long as Nie Fei is willing, he can extract the aura from a stone.

"Okay, good, it's really good, with the Demon Refining Decision, the problem of insufficient spiritual energy will be completely solved, as long as I am given enough time, I will enter the realm of the Second Transformation Soul Demon, just around the corner. ”

Nie Fei showed a look of intense surprise on his face, the appearance of the Demon Refining Duel completely made up for the lack of aura, as long as he was willing, he could replenish all the consumed aura.

"However, this exercise must not be leaked out, it can transform all things in heaven and earth into aura to replenish oneself, this exercise is too against the sky, and no one can bear this strong temptation. ”

Nie Fei secretly thought in his heart that this technique was really too against the sky, if it was passed on, I was afraid that those hidden shocking old demons would not be able to help but snatch it.

The husband is not guilty, but he is guilty!

If this news spreads, not only will he never be at peace, but even whether the Flame Demon Palace can continue to exist in the Purgatory Abyss is unknown.

"I don't know if this demon refining can really absorb the soul and life essence of all things in heaven and earth as mentioned above, and transform him into the aura he needs. ”

Nie Fei's eyes moved, his body jumped out of the tree hole, squatted on a branch, and pressed his palm directly on the trunk of a tree three or four meters high.

"Take heaven and earth as a furnace and refine heaven and earth. ”

Nie Fei silently used the heart method of refining demons, and suddenly his palm pressed on the trunk of the tree suddenly turned pitch black, and one after another air currents swirled in the palm of his hand, as if it was a cosmic black hole, and a super devouring aura erupted from it.

Suddenly, Nie Fei's body trembled suddenly, and a look of disbelief appeared on his face.

Nimbus!

He really felt the aura!

With the operation of the Demon Refining Duel, Nie Fei clearly felt that the entire big tree seemed to be refined, and one after another pure spiritual energy entered his body along his arm, and finally entered his dantian.

Continuously, this aura is very pure, not even worse than the heaven and earth aura after the purification of the heart demon seed.

This aura, in particular, carries a hint of vitality, slowly nourishing the meridians.

Nie Fei was fascinated, squinting his eyes slightly, enjoying this vitality.

However, as a large amount of aura was refined by Nie Fei, the big tree in front of Nie Fei was also drying up at a speed visible to the naked eye, and the leaves fell from the branches to the ground one by one.

In an instant, this tree seems to have gone through hundreds of years of time, from vigorous vitality to twilight old age, in a blink of an eye.

This is the result of the passing of life, the aura is no less than life, the flow of a large amount of reiki is equivalent to the passage of life, and this big tree will naturally experience growth smoothly, youth, middle age, old age, in a very short period of time has changed.

"Bang!"

Suddenly, there was a dull sound, and the big tree in front of Nie Fei was like a ball of flying ash, and it suddenly collapsed.

"Whew!"

Nie Fei opened his eyes and let out a long breath of turbidity, only to feel that the spiritual energy consumed in his body was suddenly replenished, although it was only half a small one, but Nie Fei had a bright smile on his face.

"It seems that this demon refining duel is extremely exquisite, with the support of this demon refining duel, there is no need for a demon core to replenish the aura, and I can stabilize my realm in a short period of time. ”

Nie Fei had a bright smile on his face, his body moved, and he disappeared directly in place, he wanted to find a safe place to stabilize his realm.

This is a hidden position, full of towering trees, several or even dozens of people can't hug the big trees, a figure sitting cross-legged in the middle of the branches, the dense branches and foliage easily obscuring his figure.

This figure was like a dry stone, and there was not the slightest fluctuation of life breath on Zhou's body, like a dead man, if it weren't for the pure and pitch-black demonic qi that flickered on his body from time to time, no one would think that there was a person here.

This person was none other than Nie Fei.

"Take heaven and earth as a furnace to refine the world. ”

Nie Fei silently recited the mantra, and his demonic sense immediately swept around like a wave of qi, directly attached to the big trees.

Suddenly, Nie Fei felt several spiritual qi directly burst out, and a long dragon of spiritual qi was formed, which directly submerged into his body.

Rumble!

When the aura dragon submerged into his body, Nie Fei's body trembled violently, only to feel a majestic breath of life burst out in his body, and when he fought with Golden Retriever Roar before, the injuries he received were under this breath of life, and he quickly recovered at a speed visible to the naked eye.

"It's such a strong breath of life, it seems that I am right, as long as my demon sense covers the range, I can easily seize the aura of other living beings to cultivate, okay, good, with this demon refining decision, it will be easy for me to stabilize the realm, and I can even go further." ”

Nie Fei's heart was shocked, this is Purgatory Ridge, Purgatory Ridge lacks nothing, that is, there is no shortage of demon beasts and big trees.

Nie Fei had calculated that the transformation of a thousand-year-old tree into aura was enough to cover three months of penance.

The aura accumulated by three months of penance is absolutely amazing, Nie Fei was originally cultivating and refining the Demon Heart Sutra, and the speed of absorbing aura far exceeds that of ordinary people, and three months is almost equivalent to the aura absorbed by ordinary people in almost a year.

Although there are not many thousand-year-old trees, there are still hundred-year-old giant trees on Purgatory Ridge, and a hundred-year-old tree is enough for more than half a month of penance, far exceeding the spiritual energy absorbed by the same level.

For example, if an ordinary person can turn a small ditch into a pond in a month, Nie Fei absorbs the spiritual energy contained in the big tree, and a month is enough to turn a small ditch into a small lake.

This is also the reason why Nie Fei can fight beyond the level, aura, when you are still a pond, people are already a small lake, the battle between the pond and the small lake, the final result is that the small lake swallows the pond, integrates the pond into his body, and makes him a part of himself.