Both time-traveled characters ended up as villainous henchmen.

"Okay." Orochimaru nodded in agreement.

"I can give you knowledge about the human meridian system and acupoints, as well as knowledge related to sealing techniques."

As for the blood circulation part, you should go back and carefully review some medical books.

Orochimaru not only agreed to provide Izumi Nen with more relevant knowledge, especially in the area of ​​sealing techniques.

He even jokingly said something to Izumi at the end, which shows that Orochimaru was in a very good mood.

Izumi Nen was also in a good mood, after all, his plan against Orochimaru had been initially successful.

He knew very well that his biggest trump card was not some immortal body, but the shared power of the black mist space.

It wouldn't be a big problem to reveal a little about the Sage Body to Orochimaru, or even let Orochimaru know the direction of his future development.

After all, he couldn't achieve his development goals quickly on his own.

For example, the Sharingan.

Although Izumi Nen had promised the Grim Reaper He Nian in the Black Mist Space that he would get a Sharingan to play with, after returning and thinking it over seriously, he was surprised to find that it was not easy for him to get a Sharingan in the ninja world on his own.

As everyone knows, the Sharingan is a unique bloodline limit of the Uchiha clan. If you want to get the Sharingan, you have to deal with the Uchiha clan first.

The simplest and most direct way is to kill an Uchiha who has awakened his Sharingan and then gouge out his eyes.

However, given that Izumi Nen is currently under Orochimaru's strict surveillance, who is afraid of him losing even a piece of his flesh, his plan to leave the village and ambush the Uchiha is unlikely to be realized in the short term.

We need to wait for Orochimaru's next mission, and we also need to do various preliminary preparations and intelligence gathering, which will also take time.

As for other methods, such as Root, although Danzo had an arm full of Sharingan in the later part of the original work, he only obtained it because Itachi Uchiha massacred his clan.

However, the filial son Uchiha Itachi has not yet been born, so we can't rely on Root.

The Second Hokage may have retained some residual Sharingan experimental materials, but the secrecy surrounding such materials makes them not something Izumi Nen could easily obtain.

Aside from Konoha, it seems that the only other person who could possess extra Sharingan at this point in time is Madara Uchiha, who is lurking underground with Obito Uchiha.

Without a doubt, provoking Madara now is no different from courting death, even if the other party is already in his twilight years.

In conclusion, it is almost impossible for Izumi to obtain the Sharingan in the short term.

Moreover, there are more pressing matters for him to resolve right now—the evolution of his own immortal body and the fusion of Yin-Yang Escape within him.

Rather than using Sharingan to buff himself in the Black Mist dimension, it's better to solve his own problems first.

There's no rush to get the Sharingan; we can take our time later.

"I'll organize the documents this afternoon, then you can come and pick them up."

If there's any new progress, show it to me first. Don't be stupid enough to try and practice it yourself.

"no problem!"

After giving his final instructions, Orochimaru dismissed Izumi Nen and then went to his room to begin his long-awaited rest.

After receiving the confirmation, Izumi left, only to return at the appointed time in the afternoon to collect the research materials Orochimaru had prepared for him.

Orochimaru did not try to fool Izumi Nen with the research materials; the contents of the materials were very detailed.

Even Izumi Nen only glanced at it once, and he already had solutions to some of the problems that existed in the previous sealing technique concept.

After obtaining the information, Izumi Nen did not disturb Orochimaru any further, but returned to his room to continue the detailed deduction of the sealing technique.

Although his ultimate goal was to conduct experiments on eye techniques and bloodline limits based on Yin Release chakra.

However, he still started his deduction from the sealing technique of spiritual energy.

After all, even if spiritual energy gets out of control, it will cause the least harm to the human body. And once the sealing technique for spiritual energy is perfected, it won't take much effort to convert it into a sealing technique for Yin Release chakra.

Time marched on as Izumi Nen was conducting his research, and soon nearly a week had passed.

Underground training room.

Izumi Nen sat cross-legged on the ground, his hands forming the Chen Mudra in front of his chest, his eyes closed.

From his tightly closed eyes, one can easily see the dark blood vessels constantly moving and changing beneath his skin.

Unlike the Byakugan, which features bulging veins around the eyes and a ferocious appearance, Izumi Nen's eyes have no protruding skin. However, the dark blood vessels that constantly move and change under the skin add an inexplicable eeriness to Izumi Nen.

After adjusting slowly for nearly half an hour, Izumi Nen finally pinpointed the exact location of the blood vessels around his eyes.

Immediately, the dark blood vessels that had been moving around the eyes stopped changing, and their color even faded rapidly, disappearing completely within a few breaths.

Meanwhile, Izumi Nen's hands continued to move, rapidly changing hand seals. In an instant, he quickly extracted the Yin Release chakra that affected the Yin-Yang balance within his body and guided it to the dense blood vessels around his eyes.

At the same time, the meridian system and acupoints around his eyes were also filled with other attribute chakras that he had controlled in advance, including Yang Release, Water Release, Lightning Release, and the newly refined Fire Release.

The combined effect of several chakra attributes successfully restrained the Yin Release chakra in this part of the blood vessels, but the Yang Release chakra played the most important role.

Once the Yin Release chakra was successfully restrained, a simplified Qimen formation began to take shape, and an indescribable, mysterious aura slowly emanated from Izumi Nen's eyes.

Immediately afterwards, Izumi Nen carefully mobilized all the chakra around his eyes, whether it was in the meridian system and acupoints or in the blood vessels, and began to circulate in this special simplified Qimen formation in a special way.

As the chakra flowed, the energy fluctuations of the sealing technique began to emanate from Izumi Nen's eyes.

After running slowly for five minutes, the sealing technique was fully formed. It no longer required Izumi Nen to control it and could flow around the eyes on its own, maintaining the Yin Release chakra in the blood vessels to nourish the pupils.

A slightly tingling sensation with a hint of coolness emanated from above my eyes.

At the same time, Izumi Nen could also sense that a deeper transformation was taking place in his own brain region.

At this point, Izumi Nen's special sealing of Yin Release chakra and his experiment on the bloodline generation of both eyes were basically completed.

However, Izumi Nen did not immediately end his training. Instead, he maintained his training posture and even subtly increased the chakra flow around his eyes without affecting the sealing technique.

Soon, the evolutionary power originating from Agu Nen and Pika Nen emerged and quickly concentrated in the eyes.

Izumi could feel that the process of nourishing and transforming his eyes and brain had suddenly accelerated.

"At this rate, it will only take about three days to complete the initial generation of the pupil technique bloodline."

Izumi Nen slowly opened his eyes, revealing a pair of deep pupils that glowed with a faint purple light, and faintly, there were flashes of electricity deep within his pupils.