"Could it be…?"
Umino Yoru shook his head, unable to confirm his suspicions.
After sensing that Kisame and his team had fled far enough—with Raiga Kurosuki long gone—he finally mustered the courage to grip Samehada's hilt.
Just in case, he positioned all four mechanized puppets around him. If the sentient blade showed even a hint of rebellion, they'd knock it away instantly.
Carefully, he channeled chakra into Samehada.
The blade trembled with excitement, clearly loving his energy.
"Is it because I trained in Tobirama Senju's forbidden water techniques? Did that alter my chakra's nature?"
His eyes gleamed with realization. Samehada wasn't drawn to him because of sheer volume—it was about quality.
The uniqueness of his chakra came from two sources:
Tobirama's water-style secrets, which refined his water-natured chakra to an extreme purity. Wind Breathing, which infused his system with mysterious, unidentifiable energy.
"Wait—there's a third factor."
He quickly swallowed a few honeyed energy cubes and activated Gluttony Art, converting the food's essence into chakra before feeding it to Samehada.
The blade convulsed in euphoria. Waves of joy radiated from it—*"So sweet! So fragrant!"*
Then, shockingly, Samehada began… crying.
Tears (or something close) dripped from its formless "eyes." It wasn't just a weapon—it was a childlike entity, starved for proper nourishment.
Yoru kept transmitting energy, decoding Samehada's emotional feedback until the truth emerged:
Origins:
Samehada was originally a symbiote of the Three-Tails, Isobu. Its role? Digesting Isobu's food scraps, extracting chakra efficiently, and feeding it back to the beast. This process wasn't just efficient—it was bliss for Samehada. Converting waste into energy was its purpose.
The Mist's Mistake:
After capturing it, Kirigakure repurposed Samehada as a weapon, focusing solely on its chakra-absorption side effect.
But this was like using a master chef as a garbage disposal.
The Tragedy:
Samehada occasionally snuck small fish to eat, but raw food left residue it couldn't expel. The agony of indigestion forced it to abandon real meals, relying only on pre-processed chakra.
Now, Yoru's Gluttony Art-enhanced energy was a gourmet feast. For the first time in decades, Samehada remembered true fulfillment.
The Exchange:
As Yoru fed it, Samehada reciprocated—flooding him with refined chakra. His reserves surged beyond natural limits.
"This… is a godsend."
A grin split Yoru's face. Samehada was his perfect counterpart:
He had endless food energy (thanks to Gluttony Art). Samehada could convert it into chakra on demand.
"This is basically a substitute for Tsunade's Strength of a Hundred Seal!"
Both granted:
✔️ Massive chakra storage.
✔️ Instant healing.
✔️ Combat amplification.
But Samehada had advantages:
No need for slow self-charging. Unlimited "fuel" (just keep eating).
"This isn't a seal—it's a chakra power bank!"
With Samehada, he'd be an unkillable, inexhaustible force.
…But caution was needed.
"Cell regeneration isn't free."
Even Hashirama Senju—with his Ōtsutsuki-enhanced vitality—had died young. If a demigod couldn't cheat biology, Yoru's mundane genes definitely couldn't.
"Healing should be a last resort. Avoid damage altogether when possible."
Chakra was a double-edged sword: potent yet parasitic. Unlike senjutsu (which nurtured longevity, as seen with the millennia-old Sages), standard ninjutsu seemed to burn the user's lifespan.
"For true longevity, sage arts are the answer."
His Wind Breathing method might have ties to nature energy, but progress was glacial. At this rate, reaching Kage-level reserves would take decades.
Still…
"Samehada, try this flavor."
Curious, he fed it a strand of Wind Breathing-harvested energy. Would the blade crave this too?