Both time-traveled characters ended up as villainous henchmen.

"I'm not going."

Jiraiya refused decisively, and his reasons were quite valid.

"Although I have a good relationship with Orochimaru, this is Orochimaru's disciple, and I cannot interfere too much."

Hiruzen Sarutobi's expression remained unchanged upon hearing this; he simply took another puff of his cigarette.

"Teacher, if you're worried, why don't you go and see for yourself?"

Jiraiya continued, "In my opinion, the juniors should handle their own affairs. As teachers, we only need to provide guidance at crucial moments. I have faith in Orochimaru's abilities."

Besides, that kid gets along pretty well with his classmates, it's just a blood test, teacher, don't worry about it too much.

"That's true, it seems I was overthinking things." Hiruzen Sarutobi's smile deepened. "He's probably been overworking lately. There just happens to be an S-rank mission here, Jiraiya, why don't you help your teacher relieve some of the pressure?"

Upon hearing this, Jiraiya's expression immediately fell.

……

root.

In Danzo's office, Shimura Danzo, as usual, was reviewing the various intelligence reports submitted by the Root ninjas, enjoying the feeling of being in control of everything.

Suddenly, the contents of one of the intelligence reports brought back some unpleasant memories for him.

"Izumi Nen, extract Uchiha blood... Hah."

Danzo looked at the familiar names in the report and suddenly let out a cold laugh.

Two months ago, he was "warned" by the Third Hokage, Hiruzen Sarutobi, for interfering in Izumi's graduation from the Ninja Academy.

He had to restrain the tentacles at the root somewhat afterward, but now, two months later, he has long since returned to his previous root-like behavior.

"I never expected to misjudge him; this kid actually received such high praise from Orochimaru."

Thinking of this, Danzo felt a pang of regret.

If he had paid more attention back then and hadn't just given orders casually, perhaps the Root would have already recruited such a talented researcher.

However, it's not too late now.

Izumi Nen was still young at this time and his mind was not yet fully mature. As long as the plan was done properly, Root could still win him over.

"This time we can't be too hasty; we have to take it one step at a time."

A subtle smile appeared on Danzo's expressionless face.

Aside from Izumi Nen's personal value, Danzo wanted to bring this ninja, who was valued by Hiruzen Sarutobi and personally assigned Orochimaru to train, into the Root's shadowy ranks.

Hiruzen Sarutobi's expression at that time will definitely be quite interesting.

That's right. Orochimaru did a great job keeping his information secret. To this day, Danzo still believes that the failure of the Izumi Nen incident was mainly due to Hiruzen Sarutobi's interference.

……

The Orochimaru laboratory where Izumi Nen resides.

In the underground training room.

In the dimly lit training room, a faint smell of blood permeated the air.

Izumi Nen was breathing heavily, and his clothes were visibly torn.

Even the walls and floor of the training room bear numerous charred and cracked marks.

However, Izumi Nen's eyes were incredibly bright, as if lightning was flashing within them, and he appeared extremely excited.

"Finally... we succeeded."

After calming down for a while, Izumi Nen recovered some of the energy he had used up during his training. In addition, with the stamina recovery buff shared by the pirate He Nen, half of the chakra he had previously depleted had been restored.

Without much hesitation, Izumi Nen formed hand seals again, simultaneously refining the special Yin Release chakra in his blood. After circulating through several meridians near his kidneys, he incorporated another type of chakra.

Lightning Release chakra shared by Pikachu.

The two types of chakra easily merged within Izumi Nen's body without any rejection reaction. Finally, guided by the hand seals in his hands, a special blue-black lightning bolt was successfully released and struck the floor not far away.

With a muffled, subtle rumble, blue-black lightning exploded on the floor, blasting a noticeable crack in the specially made training floor.

After the explosion, the blue-black lightning released by Izumi Nen did not dissipate like ordinary lightning release. Instead, it transformed into a special fluid-like form, continuing to flow and leap around, further expanding the range of the ninjutsu's influence.

"Yin Thunder Release, successful!"

Seeing this scene, Izumi Nen couldn't help but cheer softly.

That's right, this blue-black lightning release with certain fluid properties is the result of Izumi Nen's training over the past week.

It is a combination of Pikachu's Lightning Release and Oni's Yin Release, known as Yin Lightning Release.

As for why its appearance and characteristics are similar to Yin Wu Lei in One Person World, it is because the numerous Taoist classics provided to him by He Nian, one person, gave him ample inspiration and reference.

Originally, the two types of chakra, because they both originated from different worlds and were shared by themselves, were different from the ordinary Lightning Release and Yin Release in the Naruto world.

The attempt to fuse these elements according to the ninja world's logic has proven more difficult than expected.

At this time, the connection between the human body's meridian system and the five elements provided by a Taoist text by He Nian gave him inspiration.

After some experimentation and research, he successfully discovered a similar part in the ninja's chakra meridian system. After some careful experimentation, he completed the Yin Lightning Release technique.

The characteristics of Yin Lightning Escape are similar to those of Yin Five Lightning in One Person World, but they are not entirely the same.

The Yin Lightning Release technique developed by Izumi Nen is less noisy and more concealed than ordinary Lightning Release ninjutsu.

At the same time, the power that bursts out in an instant far exceeds that of ordinary lightning release.

Furthermore, the fluid properties of this Yin Lightning Release technique also give the ninjutsu a certain degree of deception and confusion, greatly enhancing the accuracy of the ninjutsu.

Most importantly, because the Yin Release of Yin Lightning Release comes from the Ghost Extinction He Nian, it also inherits the characteristic of devouring, absorbing and strengthening itself.

However, after synthesizing a brand new bloodline limit, its characteristic changed from devouring flesh and blood to devouring and absorbing chakra, and using it to enhance its own Yin Lightning Release power.

This characteristic further enhances the power of Izumi's Ninja Lightning Release ninjutsu, greatly increasing its lethality!

"Next, we need to adapt and improve the Yin Lightning technique to match the general Lightning Release ninjutsu."

Izumi Nen let out a long breath, used Water Release to quickly clean the training room, and then rushed to the medical examination room.

He couldn't wait to see what changes had occurred in his physical data.

After another detailed examination lasting nearly two hours, Izumi Nian successfully obtained his current physical data report.

"As expected, all aspects of my physical data have been greatly enhanced, which should be related to the ability of Lightning Release to stimulate the body."

The first thing that caught Izumi Nen's eye was his physical stats, which had almost doubled.

At the same time, the quality and quantity of chakra have also been greatly improved.

Most importantly, there was the mutation in his circulatory system caused by the Bloodlust Yin Escape...

"There have been some changes. Now I can control the growth and retention of some capillaries to a certain extent, but there is still a significant difference compared to the original density of blood vessels in my body."

At the same time, the desire to devour flesh and blood, under the appearance of Yin Thunder Escape, transformed into a crazy thought of crushing and torturing enemies.

The good news is that it can be suppressed, and the intensity of this urge is also lower than the original desire to devour flesh and blood.

As Izumi looked at the conclusions in the report, he thought to himself, but his expression did not change much.

He had already anticipated this outcome, and the bloodline synthesis training had proven that his previous guesses were correct, only the effect was not yet sufficient.

"We still need to keep working hard."