Before Rokuzawa broke the cognitive barrier, the natural energy was absorbed by the body's instincts, but because of the lack of self-control and condensation, all the natural energy was scattered in the body in a free way, which was very different in terms of concentration compared to the wisp he had condensed just now.

"Just try it and you'll find out!"

Rokuzawa immediately condensed his natural energy and prepared to try it again.

There were no surprises in the results.

After seven attempts in a row, and also received impact damage from seven energy collisions, Rokuzawa thoroughly verified his guess.

As the natural energy he condensed became thinner and thinner, the impact of contact with Chakra became weaker and weaker, until it was almost none.

"But if you can't directly condense the natural energy and contact with the chakra, then how can you control the fusion of the two energies?" Rokuzawa made another difficulty.

He vaguely remembered that Naruto Uzumaki in his previous life did not encounter such difficulties when he cultivated immortal arts, but instead directly absorbed natural energy and tried to fuse.

"Direct absorption?"

Thinking of this, Rokuzawa's thoughts suddenly stagnated.

If you directly absorb the free natural energy and integrate it into the chakra, it will be like adding water little by little when mixing noodles, and naturally there is no such thing as too much water affecting the noodles.

Knowing this, Rokuzawa was immediately overjoyed, and excitedly mobilized the chakra to run in the meridians.

While running the chakra, he also used his spiritual power as a guide to pull the free natural energy in his body to the chakra energy beam, so that it was naturally swallowed and integrated by the chakra.

Sure enough, after changing the fusion method, the two energies did not burst out with energy shocks to hurt himself as before, and he smoothly integrated a lot of natural energy into the chakra.

After running the chakra twice in a continuous manner, Rokuzawa stopped and began to check his cultivation results.

However, after a closer inspection, Rokusawa was disappointed.

"Still can't do it!"

The devoured free natural energy was dissipating at an extremely fast rate, annihilating in his chakra energy beam.

Although he used the chakra to devour the free natural energy and avoid the impact damage caused by the two energies, it did not solve the fundamental problem.

The chaotic and corrosive nature of natural energy cannot make it coexist harmoniously with Chakra, and the two will still conflict after contact, and then deplete, cancel, and annihilate.

"How can we make them live in peace?" Rokuzawa began to think again.

Without addressing this, the fusion of natural energies will never succeed.

Immediately, he began to recall Naruto Uzumaki's cultivation of the immortal arts again, and analyzed the immortal traditions he had obtained from the three races.

Soon, he had an idea.

"The key should be spiritual power, using spiritual power as a medium to fuse the two!"

Although chakra is a mixture of the body's biological energy and spiritual energy, in reality many times, the two are discussed separately.

For example, in the process of cultivating immortal arts.

On the bright side, everyone is talking about adjusting the balance of chakra and natural energy to form a stable immortal energy.

But in fact, when Fukasaku Immortal taught Naruto Uzumaki, what the other party said was to adjust the balance between natural energy, spiritual energy, and biological energy.

At that time, the Fukasaku Immortal deliberately split the chakra into biological energy and spiritual energy, juxtaposing the two with natural energy, and adjusting the balance between the three simultaneously, rather than directly mixing it into chakra to cultivate.

With such examples, combined with the immortal materials of the three clans, Rokuzawa re-understood the so-called balance.

And among these three energies, spiritual energy can guide biological energy, and it can also guide natural energy, which is a kind of panacea, which can be combined with the other two energies at will.

Based on this, Rokuzawa concluded that the key to the fusion of the three energies lies in the spiritual energy, and as long as the spiritual energy is used as the medium to reconcile the other two energies, the conflict between the other two energies can naturally be avoided and the fusion of the three energies can be truly realized.

"Now, it's time to confirm your guesses!"

Liuze immediately sank down and mobilized Chakra to run in the meridians again.

However, this time is different.

While mobilizing the chakra to devour, he also used a part of his spiritual power to pull the free natural energy to actively integrate into the chakra.

As a result, as he expected, with the spiritual power as the medium, there was no accident of natural energy clashing with Chakra and annihilation.

The three energies come together very smoothly.

It's just that the total amount of natural energy is still too small, and once he loses his control, he will be squeezed and discharged by the chakra with more total amount, and it will not be able to form a stable overall balance.

Only when the total amount of the three forms a stable balance can he enter the 'Immortal Mode' and truly complete this stage of cultivation.

However, for Rokuzawa, who had already mastered the knack of the fusion of the three energies, this was just a water mill effort, and it was not a problem.

Immediately, in the following days, Rokuzawa entered the stage of adjusting the overall balance of the three energies.

It's just that, just as everyone's physique and mental power are different, Chakra's refining ratio is different, and the same is true in adjusting the overall balance of the three energies, and there is no fixed ratio that can be used as a reference, and everyone will be different because of the difference in physique.

Moreover, because of the addition of an additional natural energy, the difficulty of adjusting the balance of the three energies has increased by more than a little bit compared to the difficulty of adjusting the two energies, but has increased geometrically.

Rokuzawa was helpless, but he could only slowly grope for adjustments.

In a flash, three months passed.

During these three months, Rokuzawa constantly adjusted the balance of the three energies, making them more and more stable in his body.

And as he became more and more comfortable adjusting the balance of the three, the natural energy in his body became less and less out of control.

Not only that, because of the repeated erosion of natural energy, his physique has also been tempered to a certain extent in this situation, plus he is already in a stage of growing his body, his body has grown rapidly in the past few months, becoming more and more robust.

Although in terms of actual age, he is still only about sixteen years old, but in terms of physique, he has reached the level of eighteen.

According to preliminary estimates, if he can truly cultivate immortal arts, and his body is tempered in the process, he should be able to further accelerate his growth and reach the level of a twenty-year-old adult.

At that time, even if he doesn't use immortal arts, his body will be greatly improved in terms of speed, reaction, and strength, and he will truly enter the realm of Shangnin.