Chapter 63: The Exchange
Watching Yumesaki begin to circulate his Mana according to her instructions, Serie nodded with a look of satisfaction.
She liked people who actually listened to advice.
In her incredibly long life, Serie had seen countless beginners just stepping into the world of magic. Despite having no real skill to speak of, they often felt they were extraordinary and looked down on sound guidance. Those types usually never amounted to much.
Fortunately, Yumesaki wasn't that kind of person, which pleased Serie greatly. She proceeded to teach him a few minor techniques, showing him the finer points of Mana control. These small tricks weren't difficult to practice, and Yumesaki picked them up almost instantly.
His command over his Mana gradually became more refined and proficient.
"Thank you very much, Serie."
"There is no need for thanks; it was just a minor technique," Serie replied, waving her hand dismissively before adding a warning. "However, for the time being, do not continue to extract more Mana."
"I don't know how you managed to acquire such a massive amount of Mana in such a short time, but Mana that is out of control is very likely to make your magic unstable, which could then trigger a catastrophe."
"That wouldn't be good for you or for the people around you."
"Therefore, until you can truly control the Mana within your body freely and at will, leave things as they are for a while."
Yumesaki nodded, agreeing without a hint of hesitation.
"No problem."
In truth, even if Serie hadn't said anything, Yumesaki had no intention of continuing to extract Mana. He understood all too well how dangerous uncontrolled power could be. Lelouch, Jugo, Hiei—they were all vivid examples he kept in mind as lessons.
Yumesaki had no desire to follow in their footsteps.
After their pleasant exchange, Serie suddenly shifted the conversation toward Hashirama and Minato.
"Those two subordinates of yours... they aren't exactly living beings, are they?"
"Caught me, I see." Yumesaki smiled, then corrected her. "Actually, they aren't my subordinates; we are just partners. It's just that their world is currently being invaded by aliens. Since I have the ability to travel between worlds, I can bring them to other realms to gain enough power to fight back."
"So, in this partnership, my position is only slightly higher, that's all."
Serie didn't particularly care about that. Whether Yumesaki's position was high or low had nothing to do with her. She was far more interested in the condition of those two men.
"Explaining it is a bit complicated," Yumesaki said. "You'll understand once you see their manga."
Yumesaki opened a Door-Door portal connected to his world and brought Serie to his bedroom. He found the Naruto manga and handed it over to her. It took Serie about ten minutes or so to finish the entire storyline.
"Ninjutsu? What a fascinating power. Other worlds truly are eye-opening."
She had already found the strange Devil Fruits from One Piece quite interesting, and the Ninjutsu from the world of Naruto was no exception.
Of course, Serie didn't find most Ninjutsu particularly special, as she could achieve similar results with magic—often even more thoroughly. However, things like Edo Tensei, Yin-Yang Release, Truth-Seeking Balls, and a few other specific techniques genuinely surprised her.
It had to be understood that even in her world, there had never been magic capable of resurrecting the dead. Yet, in the Shinobi world, there were Ninjutsu that could bring the deceased back to life. And there wasn't just one type.
Setting everything else aside, that fact alone was valuable enough for Serie to investigate thoroughly.
"Want to learn Ninjutsu? No problem. I'll find a Ninjutsu expert for you, and the two of you can exchange ideas."
When Serie expressed her desire to research Ninjutsu, Yumesaki agreed without a second thought. He even opened a door to the Naruto world, taking Serie to Orochimaru's secret hideout where they found Tobirama, who was currently busy researching the power of Devil Fruits.
Initially, when Tobirama heard someone wanted to consult him about Ninjutsu, his first reaction was annoyance. He was in the middle of studying Devil Fruits and didn't have any spare time to teach others.
However, when he learned that the person seeking his counsel was a Great Mage from a world of magic—one who had lived for thousands of years and mastered countless spells—he changed his mind instantly.
Serie wanted to consult him about Ninjutsu, and he felt exactly the same way about her magic. The current Tobirama, for the sake of fighting the Otsutsuki, was unwilling to pass up any form of power.
The human and the Elf hit it off immediately and began a deep exchange.
Tobirama explained Ninjutsu and Chakra to Serie.
Serie passed on the knowledge of Mana and magic to Tobirama.
Both were masters in their respective fields, and their explanations were systematic and profound. To ensure the other understood, they went into great detail, sharing their fundamental understandings of Chakra and Mana with one another.
Even Yumesaki, standing to the side, listened with great interest. He gained a much deeper understanding of both energies.
At first glance, Chakra seemed to have no connection to Mana. But that wasn't actually the case.
Don't forget that above regular Chakra, there was something even more powerful called Senjutsu Chakra. Normal Chakra was formed by blending physical and spiritual energy in perfect balance. Senjutsu Chakra, on the other hand, was the power produced by drawing Nature Energy from the surroundings into the body and balancing it with one's own physical and spiritual energy.
The interesting part was that Mana was extracted by Mages through the absorption of Mana from the atmosphere. What kind of power was this atmospheric Mana?
The moment Serie stepped into the Naruto world, she understood; the Mana in the atmosphere was what this world called Nature Energy.
Whether it was Mana or Nature Energy, both were essentially power generated by the planet itself. Shinobi used Nature Energy to extract Senjutsu Chakra, while Mages used Nature Energy to extract Mana. They seemed different, but they were simply different applications of the same core power.
Furthermore, it was worth mentioning that Mana could also be transformed through vitality. And when Shinobi extracted Chakra, the essence of it didn't seem much different from squeezing out their own life force.
This reminded Yumesaki of the Nen abilities from the Hunter x Hunter world.
If Yumesaki remembered correctly, Nen was the ability to freely manipulate "Aura," the life energy overflowing from the body. Everyone leaked a small amount of life energy slowly, but most people couldn't control the leak, so it had to be contained. When you could control your Aura, you could awaken Nen abilities.
Aura was really just another name for vital energy.
At the same time, Yumesaki also thought of Haki. In the world of One Piece, Haki was a latent power possessed by all humans—an innate ability that existed like an instinct. However, most people never realized this power or could never draw it out in their entire lives. This explanation was strikingly similar to Nen.
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