Both time-traveled characters ended up as villainous henchmen.

In Izumi Nen's original plan, the fusion of Yin and Yang Release would be extremely difficult. He might need to overcome many obstacles and even share the power of the Black Mist Space several more times in order to complete it.

However, reality was far less complicated than he had imagined.

Once the Yin and Yang chakra within his body reached a balance again, the power of evolution directly exerted its force, allowing the two types of chakra to find their own way out within his body.

The first to achieve yin-yang fusion were his Yin-Yang Water Escape and his Yuan-Water Water Escape.

More accurately, it was two types of water, each possessing yin and yang attributes, that spontaneously merged.

And the Yin and Yang forces were successfully integrated during this process.

Izumi was initially quite surprised by this, but he quickly found an explanation.

"The highest good is like water, which benefits all things without striving."

In a sense, water is a kind of existence close to the "Tao". Water's powerful inclusiveness provides the best conditions for the fusion of Yin and Yang attribute chakra.

In particular, Izumi Nen himself possesses two special bloodlines, Dark Water and Primal Water, and coupled with the common characteristics of "water," the fusion of Yin and Yang attribute chakra is as harmonious as water and milk blending together.

There were no other unexpected events during the process; everything happened naturally and smoothly.

Along with Izumi Nen's state of mind, he also became more calm and composed.

Now, the Yin-Yang Release chakra, which has been initially integrated, has encountered the pure life energy extracted from Izumi Nensen's body, and another, deeper transformation is quietly taking place.

Gradually, as the first Sage Technique Yin-Yang Release chakra appeared, it was as if a chain reaction had occurred, with more Sage Technique Yin-Yang Release chakra appearing one after another.

Within a few breaths, it filled Izumi Nen's chakra meridian system and blood circulation.

At that moment, Izumi Nen's eyes narrowed, and the hand seals in his hands changed rapidly. He quickly mobilized the Yin-Yang Release chakra that had just been generated in his body, and began to gather and compress it into a more chaotic state.

The gap between Yin and Yang became increasingly blurred, and even the original Yin-Yang Escape technique was rapidly becoming chaotic and disordered.

This mass of Yin-Yang Release chakra, which had been aggregated and compressed into an even more chaotic state, showed signs of going out of control and seemed poised to backfire on its master, Izumi Nen, at any moment.

It was at this moment that Izumi Nen's meticulous preparations for the Two Elements Seal came into play.

The meridian system, acupoints, and blood vessels that he had set up and positioned were slowly unfolding into an exquisite and complex special sealing technique under the stimulation of the Yin-Yang Release chakra of the Sage Art.

As soon as the sealing technique appeared, a special suppressive and sealing power, along with a special spatial aura, acted together on the sage technique Yin-Yang Release chakra within Izumi Nen's body, which was about to go out of control.

In an instant, the out-of-control process of the Sage Art Yin-Yang Release chakra stopped abruptly, and instead, under Izumi Nen's control, it underwent further compression and aggregation.

Ultimately, this mass of Yin-Yang Release chakra was compressed into a single point and completely sealed away by a sealing technique, disappearing into a special sealed space.

The original sealed space was transformed into a chaotic land without beginning or end under the influence of the Yin-Yang Release chakra, which had been compressed and aggregated through numerous layers of magic.

The primordial chaos, without beginning or end, is the origin of all things in the world.

In the Naruto world, Yin-Yang Release is also known as the technique that creates all things from nothing and gives them life.

At this moment, the two concepts began to converge and collided, sparking a strange synergy.

Changes began to occur within the chaotic, sealed space.

The light and clear rise, while the heavy and turbid descend, and Yin and Yang reappear.

Black and white replaced chaos, filling the sealed space, and began a cycle of constant merging, transformation, and separation.

The concept of Tai Chi is also rapidly absorbing the characteristics of Yin-Yang Release from the ninja world.

This process continued for nearly a day before the violent changes within the sealed space finally ceased.

Outside the sealed space, two patterns resembling magatama appeared in Izumi Nen's lower abdomen, one black and one white.

Izumi Nen knew that this was not the magatama widely circulated in the ninja world, but the yin-yang fish in the Taiji diagram.

The two concepts are completely different.

Of course, if the ninjas in the ninja world make a mistake, he won't specifically point it out.

After all, it's best to keep things like the Yin-Yang Seal secret at this stage.

He also considered this issue when designing the Yin-Yang Seal.

Under normal circumstances, the Yin-Yang sealing technique in his dantian can be hidden. Even if it is revealed, its shape will be adjusted to the ordinary four-symbol sealing technique to confuse others.

That's right, this is mainly aimed at Orochimaru.

It's always good to have a backup plan.

At this point, Izumi Nen's Yin-Yang Sealing Technique can be considered to have been completely mastered.

He ended the active maintenance of the sealing technique and took a short rest.

During his rest, even without deliberately maintaining the operation of the sealing technique, the Yin-Yang Seal effectively maintained the stability of the Yin-Yang Release chakra within his body.

It even connected the immortal body, chakra meridian system, and blood circulation system because of the Yin-Yang seal.

His Sage Art Yin-Yang Release chakra can be slowly synthesized on its own and eventually accumulated in the sealed space, without the need for separate refining and synthesis.

AFK training mode successful!

Of course, the cultivation efficiency of this AFK mode is far less than that of Izumi Nen's normal cultivation, probably less than one-tenth of the efficiency of normal cultivation.

However, over time, this will amount to a terrifying number.

At the same time, as the Yin-Yang Release chakra of the Sage Technique continued to gather in the sealed space within his body, Izumi Nen also sensed an extremely faint and subtle life force appearing within it.

"Is this the creative power of Yin-Yang Release...? Perhaps I can cultivate a tailed beast myself."

Izumi Nen thought about it more and more and felt that there was a chance, and his eyes became brighter and brighter as he thought about it.

"A powerful tailed beast composed of Sage Chakra!"

Although the amount of chakra possessed by the tailed beasts is terrifying, Izumi Nen has the support of the Black Mist Space. As long as he converts all his power from other worlds into chakra and injects it into the space, the progress of the tailed beast training plan can be greatly accelerated.

After a brief adjustment period, Izumi Nen got up and began to move around in the dark cave.

With the synthesis of his Yin-Yang Seal, his Sage Body has successfully established a connection with the chakra system. The special evolutionary power existing within him has once again demonstrated its divine power, further optimizing his Sage Body and the Yin-Yang Seal.

He speculated that it might not be long before he could advance the Yin-Yang Seal to the next stage, the Four Symbols Seal.

In his excitement, a flash of lightning burst forth from Izumi Nen's eyes, illuminating the dark cave space and striking the cave wall with a loud bang, leaving a scorched mark.

After sensing it for a moment, Izumi Nen's face showed an expression of disbelief and surprise.

His lightning technique actually gained some benefits during the fusion of Yin and Yang, and its power was greatly enhanced!