Naruto: The Ōtsutsuki Bloodline Development Manual

"Looks like everything's fine for now."

Deep within the dense forest of the Land of Hot Water, inside a secluded cave, Kakashi and Kitagawa Minamoto sat side by side against the wall, while Guy kept watch outside.

All three of them looked battered, their clothes in tatters. Minamoto's shirt was completely gone, and Kakashi's green vest had been destroyed as well.

Only Guy seemed perfectly fine. After finishing his check of the surroundings, he returned to the cave and, seeing the two ragged figures before him, quickly gave them a thumbs-up with a bright grin.

"Yosh! Looks like I won this time. Now let me protect you both and show you the power of youth!"

"Hey, hey, hey, this isn't the time for that..."

Kakashi rubbed his head, still feeling a bit dizzy.

"What we need to do now is quickly summarize the intel and send it back, and then get out of here as soon as possible."

He was indeed exhausted. Using the Mangekyō Sharingan for the first time had drained his Chakra as if it were being siphoned away, leaving him feeling miserable.

Fortunately, the Mangekyō Sharingan could be deactivated; otherwise, he wasn't sure how long he could have lasted. Still, he sighed regretfully.

"It's a shame we couldn't stop Obito."

"That couldn't be helped, Kakashi-sensei."

Hearing this, Minamoto, sitting nearby, spoke up wearily.

"That guy's space-time technique is so elusive. In that situation, I doubt anyone could have done anything."

"True, Kakashi."

Guy nodded in agreement, but his gaze quickly shifted to Minamoto.

"Still, Minamoto, you were incredible. If it weren't for the commotion you caused, we'd still be struggling right now."

"Just luck, just luck..."

Minamoto chuckled awkwardly, but Guy rubbed his chin thoughtfully.

"Your actions earlier were a bit off. If I hadn't dodged in time, I might've been caught in the blast. The guy I was fighting got torn to shreds by the shockwave—it was terrifying.

But it was precisely because of your attack that Obito had no choice but to prioritize saving someone else."

"I got caught in your shockwave too," Kakashi muttered, pursing his lips. He looked at Minamoto curiously.

"What exactly happened back there?"

"The Eight Inner Gates."

Before Minamoto could respond, Guy's expression turned unusually serious.

"You used the Eight Inner Gates, didn't you? Maybe even something else, right, Minamoto?"

Not just Guy—Kakashi frowned deeply as well, both of them now scrutinizing Minamoto.

This gave Minamoto a bit of a headache, but Guy's words aligned with the excuse he had prepared earlier.

"Something like that."

Minamoto nodded and went along with Guy's assumption.

"The guy I faced seemed to have multiple hearts.

Through some kind of secret technique, those hearts turned into monsters capable of fighting, each with a unique Chakra nature.

And he knew I could use the Flying Thunder God Technique, so he was constantly on guard.

Given his strength in taijutsu, ninjutsu, and everything else, I had no choice but to resort to extreme measures. He didn't have intel on my use of the Eight Inner Gates, so..."

"Multiple hearts, transformed into fighting monsters through a secret technique?"

Guy rubbed his chin thoughtfully, while Kakashi furrowed his brows even deeper.

"That kind of enemy is truly dangerous. But you can't act recklessly—using the Eight Inner Gates will disrupt your entire Chakra flow. Acting carelessly could lead to major problems," Kakashi warned.

"Exactly."

Guy sighed but quickly turned serious again, looking at Minamoto.

"You were lucky this time, but the Eight Inner Gates is not something you should take risks with. Understood?"

Both of them were now advising Minamoto, though they didn't seem particularly surprised.

After all, over the years, they had grown accustomed to extraordinary occurrences.

For instance, a thirteen- or fourteen-year-old Obito had orchestrated the Nine-Tails incident, killing the Fourth Hokage and his wife.

Or a thirteen- or fourteen-year-old Itachi Uchiha had massacred the entire Uchiha clan and even knocked out Kakashi in an instant.

Though Minamoto was from a civilian background, his mastery of Purple Lightning combined with the Flying Thunder God Technique made him exceptional.

With Minato Namikaze as a shining example, who had wiped out fifty Iwagakure ninja in an instant during the Third Shinobi World War, it wasn't surprising that Minamoto could achieve similar feats.

"I understand. I'll use it cautiously in the future."

Minamoto nodded, and he genuinely meant it.

The Eight Inner Gates...

While highly effective, it wasn't without its drawbacks.

As an Ōtsutsuki, Minamoto was a "privileged being" in some ways. He could initially control the Chakra disruptions caused by the gates.

But as he opened higher gates, his Chakra control began to falter. When he opened the Sixth Gate, he truly felt like he had entered "Minamoto-shin Activation."

In that moment, his boiling bloodline pushed his Chakra into chaos, but it also made him feel immensely powerful.

"But the aftermath was rough..."

The bloodline's surge brought immense strength, but it wasn't something his current self could fully handle. After the euphoria, all that remained was emptiness and exhaustion.

Thankfully, he had obtained White Zetsu's cells, which, after unlocking his bloodline's potential, granted him strong regenerative abilities.

Otherwise, he might not even be able to walk now. Instead, he was merely fatigued and drained, needing a few days of rest to recover.

"This technique can't be used recklessly. It's only for desperate situations. So..."

Minamoto naturally turned to something more stable, less taxing, yet still capable of enhancing his power.

"Sage Arts."

He thought of the Sage Mode he had long possessed but hadn't yet refined. Unlike the Eight Inner Gates, Sage Arts didn't exploit his future potential but instead enhanced his current strength.

"Besides, when Sage Mode is activated, doesn't it also change the appearance of the eyes?"

Minamoto recalled Naruto's Sage Mode, where his eyes turned from blue to yellow.

So, wouldn't it be reasonable for his eyes to change from black to white?

"Let's hope he takes this seriously," Kakashi muttered, tilting his head as he observed Minamoto. Ultimately, he decided to discuss this with Jiraiya when they returned and have a proper talk with the boy.

"Alright, enough about that. This time, I've gained a better understanding of Obito's abilities. But Guy, do you have any intel from your side?"

"Me? It wasn't too difficult, honestly."

Guy was also pondering how to advise Minamoto later, but he seriously considered Kakashi's question before answering.

"The guy I faced had decent taijutsu. As for ninjutsu, he didn't show much. But..."

This "but" caught both Kakashi and Minamoto's attention.

Especially Minamoto, who had used the Eight Inner Gates partly out of concern for Guy's safety.

Ironically, Guy ended up in the best condition among them!

Minamoto couldn't help but wonder how Guy managed that.

"But that guy's secret technique is incredibly strong!"

Secret technique?

Minamoto's eyes widened. Did Hidan, in his carelessness, reveal his secret?

"His regeneration is absurd. No matter how many bones I broke, he could recover completely."

"?"

"And his combat style isn't youthful at all. He poisoned his weapons, trying to kill me with toxins."

"..."

"So, to deal with him, you just need to avoid his weapon attacks and find an opportunity to break his head!"

"..."

Minamoto was stunned, staring at Guy in disbelief. He was at a loss for words.

Wait, how did you manage to get everything right but for all the wrong reasons?

Or maybe you got all the processes right but arrived at the wrong conclusion?

Something wasn't adding up!

At that moment, Minamoto's System suddenly pinged.

[Side Quest Completed]

[This Team Can't Be Without Me!]

[Reward is being calculated...]

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