As Uchiha Gen finished explaining, he paused briefly, then continued:
"Also, using Rinnegan for resurrection comes with a huge cost."
"It drains an enormous amount of life force from the user—almost like exchanging one life for another."
Truthfully, Uchiha Gen wasn't completely certain about this.
After all, he had never actually seen Rinnegan in action and didn't know the exact mechanics of the Rinne Tensei Technique.
All he knew was—
Nagato had died after resurrecting all the fallen Konoha ninjas.
But—
Nagato hadn't just resurrected one person—he had revived hundreds.
So—
Did he die from exhaustion of life force?
Or was it simply the price of the technique itself?
That part—remained unclear.
After all, Uchiha Obito had also used Rinne Tensei under Black Zetsu's control, but he didn't die instantly.
Instead—
His hair turned completely white, and his body weakened significantly, as if his life force had been drained.
If Obito survived after using Rinne Tensei, then maybe it didn't require death—just a massive amount of vitality.
"I need to study Rinnegan firsthand to truly understand it."
Uchiha Gen thought to himself.
A Life for a Life?
"A life for a life?"
Tsunade frowned deeply.
"If that's the case, then Nagato will never agree, and neither will I."
She clenched her fists.
"I can't exchange someone else's life… for my brother's."
If it were someone like Uchiha Madara, she wouldn't hesitate.
But Nagato wasn't some evil warlord—he was Jiraiya's student.
Someone innocent in all of this.
She refused to take a life just to bring Nawaki back.
Uchiha Gen shook his head.
"I'm not sure yet. I only know what I've observed so far."
"But there's a high probability that it just requires a huge amount of life force, not necessarily death."
"And for me… that's not a problem at all."
He grinned slightly.
"You guys already know—I've mastered the Life Force Conversion Technique."
"As long as there's enough chakra, I can restore vitality as much as I need."
Tsunade's eyes widened, and she suddenly relaxed.
"That's right! If it's just life force, it's really not a problem!"
She sighed in relief.
"Then, we still have a chance."
Kushina suddenly raised her hand.
"I've mastered it too!"
Uzumaki Rena hesitated for a moment, then softly added—
"M-Me too..."
She shyly raised her hand.
Uchiha Gen blinked in surprise.
Then, he chuckled.
"Well, that makes sense."
"You all have Uzumaki Sage Bodies and Senju lineage—your vitality is naturally overwhelming."
"Speaking of which—"
He suddenly turned to Tsunade.
"Miss Tsunade, give me some of your blood."
"I want to study it and see if I can unlock Senju Sage Body… or even Wood Style."
Of course—
That was just an excuse.
He already had a large piece of Hashirama Cells taken from Danzo's Root Headquarters.
Studying those alone would be enough to develop Hashirama's Sage Body.
But—
The more advanced a technique, the harder it was to master.
Hashirama's Sage Body might be too difficult for most people.
So—
If he could first develop a weaker version—Senju Sage Body—it could serve as a stepping stone.
Once people mastered that, they could then work towards Hashirama's full power.
This way—everyone could benefit.
Tsunade's Contribution
Tsunade raised an eyebrow.
"I was wondering when you'd finally ask for it."
She smirked.
"You studied Kushina's blood to create the Uzumaki Sage Body and Kagura Mind Eye—there's no way you'd forget about my blood."
"Did you finally remember?"
Uchiha Gen laughed sheepishly.
"Honestly? I forgot."
"I was too focused on fully unlocking the potential of the Uzumaki Sage Body."
Tsunade rolled her eyes but didn't argue.
She simply went home, grabbed a syringe, and drew about ten milliliters of her blood.
Then—
She handed it to him.
"Here. If you need more, just ask."
Uchiha Gen grinned.
"Thanks, this should be plenty!"
He quickly stored it away for later research.
A New Path to Power
Tsunade then crossed her arms.
"To be honest—I don't even know if the Senju clan has a true Sage Body."
"Our bloodline inheritance isn't as obvious as the Uzumaki's."
"Even if we do have it, it's probably incomplete."
She looked him in the eye.
"I hope you can fix that."
"Create a true Senju Sage Body. Something better than what we've ever had."
"And as for Wood Style…"
She shook her head.
"Don't waste too much effort on it."
"I've studied it. My great-uncle Tobirama studied it too."
"In the end, we concluded that my great-grandfather Hashirama's Wood Style… wasn't inherited."
"It was his alone."
Even if someone perfectly combined Water and Earth chakra—
It still wouldn't be the same.
Uchiha Gen nodded in understanding.
"I figured as much."
"I already mastered the five-element Nature Transformation—and even when I combined Water & Earth, it wasn't the same as Hashirama's Wood Style."
That meant—
Hashirama's Wood Style had another element to it.
Something beyond just chakra nature fusion.
Maybe it had to do with Sage Energy.
Or maybe—
It was directly tied to his unparalleled vitality and life force.
Whatever it was—
He'd figure it out.
The Breakthrough!
Three days later—
[You have deeply analyzed Tsunade's blood and combined it with your knowledge of the Uzumaki Sage Body. You have achieved enlightenment and created Senju Sage Body Training (Complete Edition).]
[Senju Sage Body Training (Complete Edition)]
– Requires a small amount of Senju blood as a catalyst.
– Upon perfect mastery, grants the complete Senju Sage Body Bloodline.
Uchiha Gen smiled.
"Perfect! Just as I wanted!"
He immediately started cultivating it.
Five days later—
He fully mastered the Senju Sage Body.
But he didn't stop there.
He kept researching—
And two months later—
[You have analyzed the Uzumaki and Senju Sage Bodies, combined them with Uchiha blood, Ice Release, Sage Bones, and various other bloodlines. You have created an Incomplete Chaos Sage Body Training Method.]
[Chaos Sage Body Training – Incomplete]
– A unique bloodline refinement technique capable of absorbing multiple bloodline traits.
– Can be continuously upgraded by integrating more bloodlines and physiques.
Uchiha Gen laughed.
"This… is exactly what I needed!"
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