The Genjutsu Devil of Konoha

Seijuro prepared himself, making sure to take all of his stuff.

Didn't take him long. He still went to help the medics, you know, one last time—and when he was alone, he meditated.

With his newfound chakra, he could now make about 100 clones. Nah, maybe even 500... and well, since he was given such a wonderful, wonderful gift—

Let's see... he was given 1 week.

500 clones, each working on refining all the techniques he already knew.

Hehehe. Truly was a lucky guy.

Something he did notice was the Tailed Beast chakra used... came back. As in, he wasn't on a time limit before the chakra ran out.

When exhausted, the chakra of the Bijuu... replenished itself.

Hm, the Seven-Tails would recover soon enough, but Seijuro would forever have this 90% Bijuu chakra. How nice. Never-ending energy.

And since he was fusing it with his energy, that energy fused with his own. Probably why the energy was replenishing when he used it.

It seemed to think the chakra was his own.

How nice of it. Guess his complicated seal wasn't for nothing.

Seijuro could be seen, a red cloak enveloping his whole body, far away from the sensing unit of his camp.

Opening up his mouth, he condensed chakra like no other.

A Tailed Beast Bomb, aiming it toward a nearby Iwa camp.

A smile appeared on Seijuro's face.

He released the blast and watched as the Tailed Beast Bomb zoomed through the air.

He had placed a Genjutsu over the area, so the Iwa-nin were unaware of the sun coming toward them.

Seijuro didn't think much of it—it was just a small Bijuu Bomb... it couldn't be that destructive.

KABBOOOMM

The earth shook... violently... He could hear the explosion from where he was, hundreds of meters away.

He saw the mushroom cloud that arose due to the explosion.

He could tell how a good chunk of the forest was reduced to nothing but harsh wasteland in the wake of this beast's power.

Wow.

Seijuro reverted back to his human state. His skin was still semi-red, burning a bit due to the Bijuu Chakra.

He could manage. It wasn't that bad.

Applying Medical Ninjutsu to himself, he watched what his newfound power could do.

Hm... so this was how it felt to be a Kage-level shinobi.

Still, his pride didn't allow him to celebrate. Sure, he was strong now, but that was borrowed strength. It wasn't his own, and it certainly wasn't a strength he could showcase to others.

He needed to make this power truly his own.

...

The Bijuu Bomb... the technique he just used—he needed to find a way to make a technique like that again.

But for his human self.

He would achieve it.

That, he was sure of.

Well, that was an Iwa camp dealt with.

Genjutsu still activated, he returned to camp.

There, he switched with his clone who had been training the Body Flicker Jutsu.

He sighed a bit.

Then decided to release 10 clones.

He calmed himself... yup, that was a lot of information, and he wasn't trying to get brain damage, so throughout the day, after every 10 minutes, 10 clones would be deactivated.

That was a solid enough number, and he could heal his brain with Medical Ninjutsu anyway. The remaining 490 clones now had a new goal.

Make a copy of the Bijuu Bomb.

He was sure they could manage just fine.

Truly beautiful. A 10-year-old with the power to level a small nation. This world was truly fair.

And thus, that's how his remaining week went.

On the last day before he had to leave, he went to where the squad used to be.

"Yow, isn't it Mister Special Jounin," Riku said with a grin on his face.

"What are you doing here?" Setsuna said, his Uchiha look still present on his face.

"Don't think you can come here and flex on us," Kaien said, seemingly ready for a fight.

"Seijuro-san!" Mai said, greeting him.

Fugaku, sitting on his chair, glanced at the boy... what was the purpose of this visit?

"Thank you for taking care of me," Seijuro said, slightly bowing to show respect—truly not trying to be a dick.

Under their squad, he was able to grow quite a lot. The battle experience he got there was like no other.

"Don't think you can come back here and act like you're still one of us," Setsuna said, arms crossed, his Sharingan gaze half-lidded in that classic Uchiha smug-passive-aggressive glare.

Seijuro blinked at him slowly. Then tilted his head.

"I never stopped being one of you," he said in his usual calm tone. "Unless I suddenly became a stranger overnight."

"Hmph," Setsuna scoffed, though the corners of his mouth twitched like he wanted to smile. "Still annoying."

"You're just mad they didn't make you Tokubetsu Jounin," Riku chimed in with a bark of laughter, clapping Seijuro on the shoulder like he didn't just get promoted into the shinobi equivalent of middle management.

Seijuro simply smiled.

Mai stepped forward then, her expression softer than usual.

"We heard from Fugaku-sama," she said. "You're being transferred to the Suna front."

Seijuro nodded.

"It's a medical deployment. Lady Tsunade requested it," he confirmed, keeping it short. No point in saying he'd be pretending people were alive long enough for Tsunade to save their dying asses. That was just... extra.

"You're gonna be gone a while, huh?" Riku asked, scratching the back of his head.

"Two to three months, maybe more," Seijuro replied. "Depends on the casualties and poison strain variations."

That made the mood drop a bit. War had a way of reminding people they were still kids wearing hitai-ate and pretending they were grown.

Setsuna clicked his tongue.

"Don't die, idiot. Only I get the pleasure of doing that."

Seijuro gave him a gentle smile.

"Take care," was the reply he got from Fugaku... wow, he got something from the squad captain.

Nice.

And thus, after excusing himself from his squad—

Heh, more like former squad—he prepared himself.

Leaving the camp with the supply convoy.

They were roughly 30 Chūnin, 50 or so Genin, and like 10 Jounin. The supply was indeed that valuable. They only moved during the night or when they had cover.

A Byakugan user guided them, telling them when to move and if an enemy was attacking. They used a secret path that hadn't been discovered yet.

Also, Seijuro had a Genjutsu over them the whole time. So even if an enemy was waiting to ambush them, they wouldn't even notice the group—even if Seijuro was in front of them, or touching their face.

Even if their significant other was getting the backshot of doom right in front of them, they wouldn't see shit.

And thus... their two-week journey went... surprisingly well.

Time skip.

As they arrived at the camp, Seijuro sighed a bit.

Well, Suna, here we come.

Shit was hot as balls. Sand everywhere the eyes could see... good. This made Genjutsu so much easier for Seijuro, as the scenery was basically the same.

Sand everywhere you look.

Seijuro planned to maybe rest a few days.

You know, out of a two-week journey.

But as they arrived, he could tell something was off. The mood didn't seem the greatest. There were several medic camps, and some young medics could be seen laid flat on the floor... drained of chakra.

Damn. Was it that bad?

One of the Jounin present began handing out water to the Konoha shinobi, who seemed to be dying of thirst.

The Konoha shinobi seemed relieved.

"Water..."

Wait, shouldn't they have water? Seijuro's group wasn't the only one with water. There should have been three groups before his.

Looking around, he noticed a distinct lack of supplies... well, shit.

Entering the medical area—

There, bodies could be seen left and right.

People drained. People burnt to a crisp. But the vast majority of people suffering seemed to be suffering from poison, nothing more.

Tsunade could be seen working on one guy, sweating a bit, her eyes focused on her task. She nimbly moved her scalpel, cutting just a bit into the man's skin.

She looked for where the poison was. She connected a tube with one of the man's blood vessels... how the fuck was she that precise?

She manually placed her hand over the shinobi's heart before she restarted it.

As she did so, the poison in his bloodstream came out through the tube.

Though the second the poison came into contact with the air... it... evaporated.

What?

Tsunade's brow furrowed a bit. She made sure to seal the poison in a bag.

She watched as the poison turned purple.

"Damn it, Shiho!" she said, clearly annoyed.

"A poison that breaks apart when in contact with air but turns bad the second it's not inside a living entity? When the hell did that grandma learn to do this?" She was frustrated.

Then looked up and saw Seijuro.

"Put on your gloves. Make sure to wash your hands," she practically commanded.

Straight to work, huh.

He listened to her.

It couldn't be that bad...