Seeing that Orochimaru was already inclined toward cooperation, Nagi spoke directly:
"I'd like you to help me research the precise method of cultivating Yin–Yang Release chakra."
That was his true purpose for coming here.
Orochimaru was slightly surprised. The question felt similar to his own lifelong pursuit—the ultimate truths behind all ninjutsu.
"Yin–Yang Release? I didn't expect that."
Nagi began explaining:
"Yin Release represents spiritual energy. Yin techniques can create form from nothing.
Yang Release represents physical vitality. Yang techniques can breathe life into form.
When the two are combined, they become Yin–Yang Release."
Orochimaru listened, fascinated. It was the first time he had heard such a clear and structured explanation of Yin–Yang Release.
At first, he had wondered why Nagi sought its cultivation method. After all, Konoha already possessed partial applications.
The Nara clan's Shadow Possession Technique and the Yamanaka clan's Mind Transfer Jutsu were Yin-based.
Medical ninjutsu and the Akimichi clan's Expansion Technique were Yang-based.
While these great clans trained their arts systematically, few could articulate the underlying principles. The most gifted might offer a basic explanation; most would simply say, "This is how our ancestors taught us."
Orochimaru grew even more interested.
"Why are you truly interested in Yin–Yang Release? There must be more to it."
Nagi replied plainly:
"Everyone possesses both Yin and Yang chakra attributes. The difference lies only in their proportions.
As for me—I seek Yin–Yang Release simply to grow stronger."
Orochimaru laughed.
"How straightforward."
He found himself increasingly appreciative of this young man.
"Very well. Come with me. Kimimaro, remain here."
Nagi turned to Ryōma Aburame and Shigaraki Tanuki.
"Wait here."
Orochimaru then led Nagi to his laboratory within Otogakure.
Inside the lab, Orochimaru pulled over a chair and sat opposite Nagi.
"Please."
Nagi took his seat.
"There's no one else here. The room is shielded from sensory detection. Continue."
Nagi nodded.
"Based on my teacher's experiments over the years, I've observed that the balance of Yin and Yang chakra differs from person to person.
For example, within the Nara clan, those with stronger Yin chakra wield more powerful shadow techniques.
In hospitals, shinobi with stronger Yang chakra achieve better medical results. Among the Akimichi, it manifests as greater ease of body expansion and increased physical resilience."
Orochimaru nodded slowly. He had observed similar patterns in the past—but never articulated them so clearly.
"I suspect your goal goes beyond that."
"Correct. I discovered by chance that Yin and Yang chakra can also enhance ordinary elemental ninjutsu."
"Oh?"
Nagi extended his palm. Blue lightning crackled in his hand.
Orochimaru studied it carefully.
"If I infuse Yin chakra…"
The lightning gradually darkened—turning black.
[Naruto Uzumaki: Whoa! The lightning changed color?!]
[Kakashi Hatake: That Lightning Release is no ordinary technique.]
[Ōnoki: Is that the effect of Yin chakra augmentation? And that technique…]
[Darui: Th-That technique! Impossible!!!]
[Fourth Raikage (A): That's my father's—and Darui's—Black Lightning!]
[Third Raikage: No mistake. That is Black Lightning.]
In Kumogakure, Samui and Mabui stared thoughtfully at the "Lightning" kanji mark on Darui's shoulder.
Following Nagi's reasoning, they began to wonder—could the Lightning mark on Darui and the Third Raikage's arm have been inscribed using Yin chakra?
Back in the laboratory—
Orochimaru gazed at the black lightning with near-obsession.
"Magnificent."
"And what if you add Yang chakra?" he asked.
Nagi did so without hesitation.
The black lightning shifted again—turning crimson red.
"And the effects?" Orochimaru leaned closer, eyes gleaming. "What differences are there between the two?"
Nagi dispersed the lightning with a smile.
"From my testing:
Black Lightning enhanced with Yin chakra increases destructive power and adhesion—its ability to cling and persist.
Red Lightning enhanced with Yang chakra increases destructive power and speed.
In terms of short-term destructive output, Yang augmentation is superior."
Orochimaru immediately followed his logic:
"But in sustained damage, Yin augmentation prevails.
One emphasizes instantaneous destruction; the other continuous destruction.
The overall destructive capacity depends on the volume of Yin–Yang chakra infused."
Nagi applauded lightly.
"Impressive, Orochimaru."
As expected, he thought. The shinobi of this world are intelligent. What they lack is direction—and a mindset inclined toward systematic inquiry.
But was that truly the case?
[Naruto Uzumaki: Huh? I know all those words separately, but together I have no idea what they're saying!]
[Mei Terumī: So if we follow the projection, could we learn this too?]
[Ōnoki: Don't be naïve. Nagi can likely control Yin–Yang chakra freely already. Some of us may not even consciously perceive it.]
Orochimaru chuckled.
"You flatter me. I merely followed your reasoning."
It was rare for him to feel genuine pleasure at praise.
Ordinarily, compliments were either born of fear or flattery. Neither pleased him.
But Nagi praised his knowledge.
As the saying goes—gold is easy to obtain; a kindred spirit is rare.
A flicker of hospitality stirred in Orochimaru.
He rose, retrieved tea leaves from a cabinet, and personally brewed tea.
After placing a cup before Nagi, he returned to his seat and sipped slowly.
Nagi drank without hesitation.
Their eyes met. Nothing was said—yet everything was understood.
With a playful smile, Orochimaru asked:
"You're not afraid I might have poisoned it?"
Nagi replied calmly,
"I already examined it with Yin chakra. There are no toxic substances."
Orochimaru's smile widened.
"To wield Yin–Yang Release so naturally—even in daily life. Remarkable."
True mastery was not demonstrated in grand gestures—but in unconscious habit.
And Nagi had clearly reached that level.
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