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The next day, there were four or five additional individuals in the underground laboratory.
These individuals were dressed like farmers working in the fields, but their faces were filled with a fierce expression, and their bodies were robust. Even though they were bound, their eyes glowed with a murderous light, emitting a strong aura of violence. Their lives had been tainted by taking the lives of others.
Shiraishi didn't inquire about their origins or their previous identities, but most of them were robbers who had committed murder outside.
Currently, there was much chaos outside, with countless robbers burning, killing, and looting. Shiraishi had encountered such situations during his missions, and he had easily dealt with many of these robber groups.
However, at this moment, Shiraishi didn't care where these individuals came from or what they had done. Once they entered the laboratory, their fate was similar to the mice that Shiraishi had used for his experiments. They fell into the category of experimental subjects.
With a systematic plan in place, the natural energy experiment itself wasn't life-threatening, but absolutes couldn't be relied upon.
After all, animal subjects had been used in previous experiments, and the life structure of animals differed significantly from that of humans. Therefore, humans were now being used for the experiment. The injection of natural energy didn't rule out the possibility of unexpected risks.
"It's hard to find experimental subjects, so don't use them all at once."
Ruri had mentioned this before leaving.
Transporting these experimental subjects had required a significant amount of manpower and resources, so she wanted to remind them.
"Don't worry, don't forget that I'm also a medical ninja, so I can reuse them."
Shiraishi knew it wasn't easy for Ruri to acquire these experimental subjects, so he didn't plan on using them all at once.
Medical ninjutsu could be extremely valuable in times like these. As long as they didn't die, they could be reused.
Moreover, Shiraishi believed that the possibility of his research endangering lives was very low. He had already experimented on numerous animals before conducting human experiments. With careful handling, life was essentially guaranteed.
After Ruri left, Shiraishi entered his official working mode.
The mouths of the few individuals brought to the laboratory were sealed with cloth, preventing them from speaking loudly. They could only let out low whimpers, showing their dissatisfaction with their treatment.
For these robbers who had lived by shedding blood on the edge of their knives, there was no fear in their eyes. It was estimated that they were contemplating how to overpower Shiraishi and escape.
Shiraishi ignored their low, angry shouts and randomly selected one of them, laying him down on the testing bench. Since he was too unruly, he had to inject him with a small dose of anesthesia first to make him dizzy and more cooperative.
"Don't worry, coming here to act as my experimental subjects is much better than living a life outside, not knowing when you'll suddenly die. And my experiments won't pose a danger to your lives, I can assure you of that."
The expressions of these individuals seemed to change, their eyes becoming wary, while Shiraishi maintained his calm tone.
Even for sustainable use, Shiraishi would do his best to ensure that their lives continued.
After all, in this troubled world, many people lived from one meal to the next.
A large country might be fine, but for people in small countries, even a meal was a luxury.
In this war-torn era where morality held little importance, Shiraishi had already told himself that life wasn't worth celebrating, and death wasn't worth mourning.
Life was often considered priceless because it was considered worthless.
.....
Two days later.
Shiraishi emerged from the underground laboratory. Except for eating and sleeping, he had spent most of his time conducting experiments there over the past two days.
Although there hadn't been any progress yet, considering that human experiments had just begun, it would take at least a week to draw some conclusions.
As he stepped out of the underground lab, Shiraishi took a breath.
It was July, and the sunlight felt scorching, draining people's energy.
One thing that made Shiraishi complain incessantly was that even though there were electric lights and computers in this world, there was no air conditioning.
When he entered the room where Ruri was, he immediately felt the difference in temperature. The coolness inside contrasted greatly with the sweltering heat outside.
The room was filled with ice, and an fan blew constantly, spreading the cool air to every corner of the room, creating an effect similar to an air conditioner.
At this moment, Ruri was wearing a loose blue casual dress, and there were scattered scrolls and black leather boxes around her.
"What are these?" Shiraishi pointed to the scrolls and the black leather case.
"These are the rewards from our previous mission, and this is your share. The total amount is 1.2 million ryo. The rest are scrolls related to medical knowledge, as well as a few practical medical ninjutsu."
"I see." Shiraishi sat down, opened one of the scrolls, and a smile appeared on his face. "I didn't expect the village to be so generous and reward me with such valuable items. This is the important information I was hoping to obtain. I thought they wouldn't be this generous. I might as well pass on some information and expose this matter. It seems that the village's higher-ups have a bit of humanity after all."
"I gave you those things because I wanted to get rid of you easily, you idiot. Do you really think you're capable of something?" Ruri glanced at Shiraishi, who was feeling complacent.
"???"
"For them, using these items to eliminate you is the most convenient way to save trouble and resources."
Upon hearing Ruri's words, Shiraishi immediately understood.
"It doesn't matter. Even though it was a mistake, these materials and medical ninjutsu have been very helpful to me."
"Really? Just be happy, then."
"By the way, what about your reward, Ruri?"
"Afterwards, I'm going to the Hokage Building. The village's higher-ups have approved me to choose any ninjutsu from the forbidden scroll."
As Ruri said this, her expression showed surprise.
She hadn't expected the Third Hokage to have such courage.
To her knowledge, the Senju clan and the Uchiha clan had always had a strained relationship. Even though things had improved over the years, it was only on the surface.
Upon hearing this, Shiraishi suddenly felt that the scroll in his hand wasn't as significant.
"Have you decided which ninjutsu you'll choose?"
Shiraishi cleared his gloomy mood and asked.
Ruri let out a bored yawn, lay down on her side, and played with a kunai in her hand.
"The elders in the clan respect my choice, but I haven't given much thought to it yet. I don't know what powerful ninjutsu are sealed in the forbidden scroll, and I don't necessarily need high-level ninjutsu. Do you have any suggestions?"
Ruri had some knowledge about the forbidden scroll, but she wasn't particularly aware of the number and types of forbidden techniques, profound meanings, and secret techniques recorded in it.
"How about choosing soul-related ninjutsu?" Shiraishi made a suggestion.
"Soul?" Ruri raised an eyebrow.
"I've heard that there's a Jounin named Kato Dan in the village who possesses a very mysterious soul-based ninjutsu. He seems to be Tsunade-sensei's boyfriend. I think this type of ninjutsu could be very helpful for my research."
"Understood," Ruri said after thinking for a while, nodding in agreement.
After all, she didn't have many demands for the ninjutsu in the forbidden scroll. If soul-based ninjutsu could truly assist Shiraishi and help him uncover the secret of immortality sooner, it would be a significant advancement for her as well.
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