Naruto: Reborn as Uchiha Obito

Later on, Obito reached into the Devouring Coffin again and pulled out an item that dissolved inside when eaten, crafted from the remains of a Dead Bone Pulse user.

Another Mist ninja... this one a little beefier than the last was dragged forward like a sack of potatoes.

Without saying a word, Obito stuffed the item down the guy's throat.

But this time… he didn't back off.

Instead, he calmly stepped behind the subject, placed his right hand on the back of the guy's neck, and began to channel his own peaceful natural energy into the subject's body.

The sensation was like pushing lava through a garden hose... slow, dense, dangerous.

Yet Obito guided it gently, smoothly… like he'd done it a hundred times before.

Under his control, the natural energy seeped into the ninja's chakra system and began to circulate using the same route defined by the Blood Demon Technique of the Devouring Coffin.

And then… it happened.

The subject began to tremble, same as Subject 1.

But instead of swelling up like a balloon about to blow, the skin remained tight... tense but stable.

Then, out of nowhere, black spell marks shaped like squirming tadpoles began crawling up the ninja's skin.

Obito narrowed his eyes. He recognized that pattern.

This was the pre-alienation phase, the body beginning to morph, to mutate, tapping into the foreign bloodline.

Piece by piece, the test subject started to look less human... more monstrous.

Flesh tightened unnaturally, muscles bulged, and his spine cracked loudly, elongating ever so slightly.

And then, slowly, everything receded.

The trembling stopped.

The skin returned to normal.

The mutation was undone, reversed like rewinding a fucked-up nature documentary.

Obito calmly withdrew his hand.

He moved around to face the ninja and looked him straight in the eyes.

The Sharingan spun gently.

And just like that, the subject responded.

He raised his right hand.

A thin but solid white bone burst through his palm like a blade.

The sight made Obito pause.

Then a grin crept across his face.

"It's finished."

It worked.

He had successfully replicated the Kaguya clan's Dead Bone Pulse into a test subject without full rejection.

This wasn't theoretical anymore.

This was real.

He was now in the Kekkei Genkai manufacturing business.

"Next, let's test the stability."

Obito waved his hand, signaling the subject to follow.

They moved to a cleared-out area... far enough away from the equipment to avoid turning his lab into a red-splattered mess in case things went sideways.

Once there, Obito activated his Sharingan again.

This time, he layered a deeper illusion... one meant to simulate battle, pain, instinctual movement.

---

"Oh, don't, stop!!"

"No, Ahh ...No"

"Yamete kudasai!"

"I'll kill you!!"

The test subject's face was a cocktail of panic and rage. He screamed, flailed, and threw his arms like he was fighting off an invisible hentai octopus in full trauma-mode... which he was.

Obito stood nearby, arms crossed, watching this Oscar-winning one-man show.

"Hmm... The Kekkei Genkai didn't go berserk. That's... quite a good result."

After a moment, as the subject performance ended, Obito nodded slowly.

A small grin crept across his face.

"So, you're Subject 2."

Dramatic name ceremony complete.

Without wasting time, Obito reached back into the Devouring Coffin and pulled out another item...this time blood-red and crackling faintly with suppressed explosive energy.

It was made from the corpse of a Blaster Ninja from the Demolition Force of Iwagakure, a nutjob who had blown up more bridges than he'd crossed.

"Let's see how your body handles this one..."

Obito repeated the same process: hand to spine, natural energy flow guided through the Blood Demon Technique, chakra modulation, and full eye control from the Sharingan.

Subject 2 grunted.

'He must've felt that power' Obito thought to himself.

The second Kekkei Genkai was successfully integrated.

And just like before, smooth as butter.

Obito stared in silence for a long moment.

"...Holy shit."

Obito looked him up and down like a proud dad.

"Two Kekkei Genkai, stable mental state, no spontaneous ass-exploding... Not bad."

He nodded to himself, completely satisfied.

"Man... I'm a goddamn genius. If this keeps up, I might just build my own Pokémon league with Kekkei Genkai users."

Subsequently, a series of experiments were carried out by Obito.

He fed them item after item...flesh and blood items dissolved from one unlucky bastard after another and what did he get?

Exactly what he expected.

Once someone fused with two or three of these things, especially the ones made from regular nobodies, the body hit a limit. Any further improvement was damn near microscopic.

Barely worth the effort.

The boost? Temporary.

Unless the item came from someone with a real-ass Kekkei Genkai like Dead Bone Pulse or Lava Release then maybe, just maybe, it'd awaken a new ability.

He looked at the few leftover items of cannon-fodder trash and scoffed.

"Yeah, like these C-list extras were gonna help me push through the fucking universe."

Rolling his eyes, he flicked a leftover shard back into the black Coffin.

"End of experiment."

As if on cue, a white head popped out of the ground by his feet.

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