The Power That Ends All Things: All-Killing Ash Bones

In Konoha Year 50, the Battle of Kannabi Bridge broke out, and Rin Nohara died.

Obito Uchiha, the most lovesick man in the ninja world, turned to darkness. First, he caused the Nine-Tails' Rampage, striking Konoha, then infiltrated Kirigakure, controlled the Fourth Mizukage, and initiated the Blood Mist policy.

In just two years, the Hozuki and Mizuki clans, the three great families of Kirigakure, were annihilated, leaving only the Kaguya clan barely surviving.

Kaguya clan territory, dungeon.

Kazama Kaguya stood at the entrance. The boy's thin, sickly body cast a long, narrow shadow, like a gray bone spur embedded deep in the darkness.

"Kazama-sama, is that you?" an excited childish voice came from the dungeon.

"Yes, it's me, Kimimaro." Kazama Kaguya stepped into the darkness, seeing the boy imprisoned behind the iron gate.

White hair, green eyes, red eyebrows, and the same Shikotsumyaku appearance as himself, possessing a beauty of Otsutsuki degeneration and inheritance.

The only difference was that Kazama Kaguya was a few years older, with pale skin and a skeletal frame, like a drained consumptive, while Kimimaro was healthy and vibrant.

Kimimaro was unusually excited at this moment. He pressed himself against the iron gate, trying to get closer to the newcomer, and said cautiously, "Kazama-sama, you haven't been here for a long time. Is your Bloodline Disease any better?"

His voice was filled with grievance, like an abandoned young beast.

Kazama Kaguya looked at the 7-year-old Kimimaro, his heart aching. He ruffled his hair and said gently, "I'm sorry, Kimimaro. It's been almost a month since I last visited you. My illness has gotten worse. I've been trying to find a solution, but unfortunately, I haven't obtained the Byakugan..."

At this point, Kazama Kaguya's expression suddenly changed. Intense pain erupted throughout his body, and he couldn't help but spit out a large mouthful of blood.

The pungent smell of blood filled the air, causing Kimimaro to cry out in panic, "Kazama-sama!"

His bones grew rapidly, forming a bone spear, and he tried to break through the iron gate, but was stopped.

"Cough cough... It's fine, Kimimaro. Don't attract other clan members. I won't die anytime soon."

"But..."

"Be good."

Kazama Kaguya calmed Kimimaro, wiped the blood from the corner of his mouth, and a shadow flashed in his eyes.

"The Bloodline Disease has worsened. The evolution of Shikotsumyaku is a trap. The ability of All-Killing Ash Bones is causing my body to collapse. The power of the Otsutsuki is truly terrifying!"

Suppressing the intense pain, Kazama Kaguya focused his mental energy. A stele instantly appeared in his mind, with rows of text shining brightly.

[Evolver: Kazama Kaguya]
[Chakra Amount: 0.3 units]
[Chakra Nature: Water, Lightning, Yang]
[Kekkei Genkai: Shikotsumyaku]
[Evolution Equation: Shikotsumyaku + Natural Energy (All Natures) = All-Killing Ash Bones] (Equation running, physical attributes low, skill overload, gene collapsing)
[Status: Bloodline Disease outbreak, estimated survival time 3 months]
[Equation List 1: Shikotsumyaku + Byakugan = Pureblood Otsutsuki?] (99% charged, missing Byakugan bloodline, please provide material)
[Equation List 2: Water + Lightning = Storm Release? (8% charged)]
[Equation List 3: Water + Yang = ? Lightning + Yang = ? Water + Lightning + Yang = ?] (0% charged)

Like all transmigrators, Kazama Kaguya also had his exclusive cheat, named [Evolution Equation].

It was inscribed on a phantom stele. As long as materials were provided to list an evolution equation and Chakra was used to charge it to 100%, all risks of failure could be avoided, and evolution would be perfectly successful.

In the two years since his transmigration, Kazama Kaguya had pondered endlessly, summarizing all the information from Shippuden and Boruto, and deducing the evolution equations for "Pureblood Otsutsuki" and "All-Killing Ash Bones."

He had fully utilized his "survivalist" spirit, ensuring his survival while extracting Chakra daily to charge, bringing the most crucial "Pureblood Otsutsuki" to the critical 99%.

The remaining 1% was stuck due to the lack of Byakugan material.

Seeing the evolution paused, Kazama Kaguya began to shift his focus.

During the Blood Mist policy, evolving Kekkei Genkai like Storm Release would be suicidal. The only way out was to evolve the ultimate technique, "All-Killing Ash Bones."

Following Naruto's cultivation method in the original work, Kazama Kaguya tried multiple times and finally absorbed natural energy as material, successfully evolving from Shikotsumyaku to All-Killing Ash Bones.

But the most unbearable thing was that the gap between the ninja world and the Otsutsuki clan was like the difference between a human and a dog.

Without the support of the Otsutsuki bloodline, as soon as All-Killing Ash Bones was activated, Kazama Kaguya entered a state of genetic collapse, with little time left to live.

"Alas, I should have known. Natural energy is everywhere. The Kaguya clan's Bloodline Disease must be a sequela of Shikotsumyaku's evolutionary regression after long-term, slow absorption of natural energy."

Looking at his dwindling lifespan and the only thing that could save him—the Otsutsuki bloodline—Kazama Kaguya sighed inwardly:

"Byakugan bloodline, if I were in Konoha, it wouldn't be difficult. Unfortunately, this is the Blood Mist Village. The only Byakugan is in Ao's hands, a strategic asset, impossible to obtain. Other avenues, given the blockade of the Blood Mist policy, let alone obtaining Hyuga clan materials, even surviving is difficult."

Thinking of the several near-death experiences he had since transmigrating, Kazama Kaguya couldn't help but want to smash Obito Uchiha's head.

The graduation exam where ninjas of the same cohort killed each other, the persecution and purging of bloodline ninjas, the isolationist policies, mutual suspicion, and daily assassinations—this was the Blood Mist Village created by Obito Uchiha's twisted worldview.

Under this terrifying and bloody rule, a crisis of trust erupted, bonds became a joke, and Kirigakure turned into a giant meat grinder.

Bloodline clans were persecuted and suppressed, while civilian ninjas were promoted to power.

Under Obito Uchiha's instigation, the civilian ninjas, who had tasted power for the first time, went completely mad. Like hyenas, they eyed bloodline users, and whenever they had the chance, they would devour the bloodline clans whole.

The Hozuki and Mizuki had already been devoured, and the Kaguya were now on the menu.

Kazama Kaguya hadn't considered running away, but the entire Kirigakure was surrounded by a barrier. If he took even one step outside it without permission, the bloodthirsty civilian ninja would swarm him.

The Shikotsumyaku was powerful, but it was far from enough to crush a team.

As a clan specializing in taijutsu and bloodline abilities, the Kaguya's deterrence was about to run out. Thousands of civilian ninja wouldn't let such a massive prize slip through their fingers.

Kazama Kaguya's last resort for self-preservation was to start a rebellion, kill the Mizukage, and restore order.

Unfortunately, the one controlling the Fourth Mizukage now was Obito Uchiha.

An insane Obito who had lost the one he loved wasn't just a failure; describing his twisted transformation as "ten times stronger when blackening" wouldn't suffice.

Kamui, Susanoo, terrifying Sharingan genjutsu—the Kaguya clan couldn't win even if they smashed their own brains out.

Kazama Kaguya had been feeling the increasingly oppressive atmosphere within the clan lately, like an explosive barrel on the verge of detonating, just needing the final fuse.

"The clan's rebellion is my last chance. Only by defecting from Kirigakure will I have a future. After two years of being a useless husk crippled by the Bloodline Disease, I doubt anyone will force me to the front lines."

From the shadows, Kazama Kaguya touched his emaciated body, his gaze fixed on Kimimaro.

After a moment of thought, he extended his hand, fingers splayed. His flesh writhed and separated, and a bone spur emerged.

It was a gray bone spur, like the decaying skeleton of a dead person.

It was dull gray, covered in cracks, and exuded an aura of decay and ill omen.

Just its emergence from his palm made Kimimaro's hair stand on end.

His Shikotsumyaku bloodline automatically activated, and rows of white, hard bones protruded, trembling as if a subject meeting their lord.

"K-Kazama-sama, what is this?" Kimimaro asked, trembling.

"All-Killing Ash Bones!"

Kazama Kaguya didn't hide it. His chakra erupted, and the bone spur instantly shot out, embedding itself in the stone wall.

Immediately after, the gray bone spur began to crumble, turning the surrounding stones into decaying debris.

The two mixed together, like the skeletal remains of a dead person weathered by centuries of wind and rain, crumbling at the slightest touch.

Kimimaro's eyes widened in disbelief.

As a bloodline genius and combat weapon, he knew the capabilities of the Shikotsumyaku better than anyone.

But this ability to turn whatever it struck into decaying debris was something he had never seen or possessed.

Kazama Kaguya explained, "Kimimaro, this is the evolved ability of the Shikotsumyaku: All-Killing Ash Bones. It possesses the power to end all things. It's a shame it's not something a normal person should wield."

"Why can't you wield it? Don't you possess this powerful ability, Kazama-sama?" Kimimaro asked, confused.

"Cough, cough, cough..."

The after-effects of using the All-Killing Ash Bones erupted, and Kazama Kaguya couldn't help but cough up more blood, giving a wry smile.

"Because the original wielder of this power was the Rabbit Goddess. The bodies of people in the ninja world are too fragile. Even though our clan inherited some of her bloodline, using this ability comes at the cost of life."

"At the cost of life?"

Kimimaro's expression changed drastically, and he said urgently, "Kazama-sama, please, do not use the All-Killing Ash Bones anymore."

"If you have enemies, please command me. If you wish it, my bone spurs can point at anyone."