Moku Kairen released the limit on his brain domain, unleashing 100% of his physical energy, slowly burning it away. About a minute later—
Kairen formed the hand seal for Shadow Clone.
"Multiple Shadow Clone Jutsu!"
One hundred and twenty shadow clones appeared and surrounded him. At Kairen's command, they all dispersed to begin training.
Kairen sat cross-legged on the ground, extending his right hand as he slowly gathered chakra into a sphere.
Gradually, a faint blue ball of chakra condensed in the center of his palm, spinning chaotically.
That's right—Kairen was training the Rasengan.
His chakra control had already reached mid-level Chūnin standards, and with his Byakugan, he could precisely guide chakra flow.
His chakra control ability was already comparable to a Special Jōnin outside. Combined with the complete Rasengan training method he possessed, this jutsu wasn't difficult for him at all!
The voice of the system echoed: "Detected host developing original ninjutsu: Rasengan. Rasengan ninjutsu development template unlocked!"
Looking at the system interface projected in his iris, Kairen saw that a new ninjutsu development template had appeared.
[Rasengan Development Progress: 0.1%]
Kairen immediately recalled all his shadow clones, ordering them to abandon other jutsu training and focus solely on the Rasengan.
Very soon, Rasengan development entered the right track.
[Rasengan Development Progress: 0.2%]
[Rasengan Development Progress: 0.3%]
...
At the Sunagakure main camp, Rasa read the intel report written by frontline commander Meimuda and then handed the paper to Ebizō.
Ebizō, Sunagakure's strategist, quickly picked up on the key points:
"Smoke transformation, explosions, physical attacks ineffective! Is this that same child from back then?"
Rasa replied, "It must be. I don't know what changes happened to him, but only that brat had such traits!"
Ebizō frowned in puzzlement.
"Smoke Transformation... That child turns into a puff of smoke when hit, with no wounds or blood—yet that doesn't match Shabei's research report."
Rasa shook his head.
"I tested it myself back then—turned that brat into a pile of bloody mush. He definitely died that time!"
Ebizō stroked his beard. "It should be a kekkei evolution. He's gradually mastering his kekkei ability. This could be the secret of his so-called immortality. His true form is likely just smoke itself—similar to the Hōzuki clan's Hydration Technique."
Rasa's tone hardened.
"Even so, his research value has not diminished in the slightest. Sunagakure must obtain him."
He suddenly ordered the nearby ANBU Jōnin: "Go summon the others. We're forming a sealing operations squad to capture that damn brat."
...
[Rasengan Self-Development Progress: 100%]
"Congratulations, host, for successfully developing the ninjutsu Rasengan!"
Kairen sprang to his feet. Two days and two nights without food or drink—dying from chakra depletion over ten times—
Thousands of shadow clones had been summoned in total, yet finally, within such a short time, he had completed the Rasengan's development.
Kairen raised his blade and drew it fiercely across his own throat.
His spirit was completely drained. He needed to die and revive to recover.
After reviving, Kairen extended his right hand, chakra surging endlessly into his palm.
'Spin!'
'Compress!'
'Maintain!'
Gradually, a deep-blue sphere of chakra condensed in his hand, chaotic currents swirling inside.
It looked like a compressed miniature typhoon, brimming with terrifying destructive force.
Kairen slammed it onto the ground. The Rasengan exploded, unleashing a powerful impact and twisting force, gouging out a crater three meters wide.
He muttered, "As expected of an A-rank ninjutsu... its power is insane!"
Then he looked at his palm, which was covered in scratches.
Forces act in both directions—the Rasengan's backlash had injured his hand.
Still, the damage was nothing compared to Wind Style: Rasenshuriken.
After practicing Rasengan for a while, Kairen sat on a rock and opened his Byakugan, scanning the movements within one kilometer.
Two days had passed, and not a single Sunagakure ninja had come. Kairen was growing impatient. If they didn't show up soon, he'd have to go hunting himself—offering up his head.
"Huh?"
In his Byakugan's sight, he suddenly spotted a blue chakra cluster, similar in size to his own.
"Whatever, even an ant is still meat. Chūnin it is!"
Kairen's taste had grown picky—ordinary Chūnin barely interested him anymore.
The Sunagakure Chūnin was a youth, around seventeen or eighteen, wearing a light brown flak jacket. He was scanning his surroundings warily.
Suddenly, a boy of about ten appeared out of nowhere before him.
In the dark of night, the sudden figure seemed ghostlike.
The Sand ninja jumped in fright. He had always been afraid of ghosts.
But his ninja training quickly steadied him. He pounced and locked his arm around Kairen's neck.
"Who are you? Why are you here?"
He was confused—children without fighting ability had no business at the frontlines of war.
Kairen scowled. "What's with all the yapping? Hurry up and kill me!"
The Sand ninja was even more baffled. He'd never met anyone so eager to die. He pressed on:
"Do you carry any intel from Konoha? Hand it over, and I might spare your life."
Kairen shook his head. As expected, this Chūnin was a time-waster. He suddenly drove an elbow into the Sand ninja's gut.
"Argh!"
The Sand ninja cried out in pain and immediately released him. He hadn't expected a child to have such strength.
Kairen landed lightly and looked at the Sand ninja, who had drawn a blade and was eyeing him cautiously—already sensing that Kairen's age didn't match his power.
Kairen walked slowly toward him, completely unguarded.
The Sand ninja stepped back twice, unable to read his moves, afraid of some trick.
Kairen bent forward, baring his neck. "Go on, cut right here!"
Sand ninja: ⚆_⚆?
He hesitated two seconds, then stepped back again, too wary of a trap to act.
Kairen shot him a glare, disappointed, and activated the voice tone of Uchiha Sasuke:
"This is why you Sunagakure are just desert trash. Even when I hand you my head, you don't dare cut!"
"What did you say?!"
People of the desert lived hard lives, but their hearts were unyielding. Hearing his village insulted, the Sand ninja's rage flared.
Kairen nodded. As expected of Sasuke's signature ability—to make others' teeth grind with hate.
He pushed his head forward again. "Come on, desert trash. My time is precious!"
"Dare call me trash?!"
The Sand ninja's temper snapped. He swung his silver blade down hard.
Blood sprayed in an instant, splattering across his face.
He froze. Did he... actually kill him? No hidden scheme?
"Ding!"
"You were killed by Chūnin Ōmori Kawa with a blade. EXP +30!"
A puff of white smoke billowed, and from it, Kairen reappeared in Sasuke's white robes.
Since it was only a lone Chūnin, with no one else nearby, Kairen hadn't bothered using his Smoke Transformation Genjutsu, saving chakra.
"You—you—you—"
Ōmori Kawa had just watched his head fall, yet now Kairen stood before him, revived.
Kairen stepped closer. Terrified, the Chūnin retreated several steps.
"Are you man or ghost?!"
Kairen once again thrust out his neck. "Again!"
...
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