Facing the charging Kaguya clansmen, Kurogane Ren, who had been using the Peacock Mystic Art, seemed unable to dodge.
But unfortunately for them, he wasn't from Hoshigakure. His attack methods weren't limited to just the Peacock Mystic Art.
Since Peacock Mystic Art: Tiger Calamity couldn't kill so many Kaguya clansmen in time and had let quite a few slip through, then…
He simply wouldn't use the Peacock Mystic Art.
The purple tiger-shaped aura let out a final roar before losing Kurogane Ren's chakra supply and dissipating into the air.
At that moment, facing the swarm of Kaguya clansmen rushing toward him, Kurogane Ren formed hand seals.
"Water Release – Water Blade Circulation Technique!"
In an instant, several streams of water emerged around him, rotating continuously while expanding outward.
When the Kaguya clansmen came into contact with the streams, the water flowed through their bodies as if encountering no resistance at all, continuing to spread outward.
The clansman whose body had been pierced remained standing there until someone behind him bumped into him. Only then did he collapse, splitting into several pieces.
This was the true form of the Water Blade Circulation Technique. When facing Obito Uchiha before, he had only been able to circulate the water blades across his body's surface to prevent contact.
Now, this was its fundamental usage.
However, it was clear that even though these razor-sharp water blades sliced through most of the Kaguya clansmen, they couldn't cut away their fearlessness.
The remaining clansmen shoved aside the fallen bodies in front, trampling over them without hesitation, their only thought being to kill Kurogane Ren.
They dodged the flowing water in various ways—some rolling on the ground, others leaping high into the air with terrifying jumping power as they lunged toward him.
"Tch, what a hassle," Kurogane Ren muttered.
The Kaguya clansmen weren't particularly strong, but their utter disregard for death was truly insane.
As he sighed inwardly, a large number of Kaguya clansmen closed in on him—some from the air, some from the ground—all of them having passed through the deadly water blades to reach him.
Twisted smiles spread across their faces as they were about to strike him.
"Bang!"
Kurogane Ren turned into a puff of white smoke and vanished.
As the Kaguya clansmen stood there in confusion, a stream of water suddenly shot out from beneath the dissipating smoke, rapidly flowing along their bodies as if trying to bind everyone in place.
The clansmen tried to grab the water, but they couldn't tear it apart. Even when they attempted to block it with their hands, it simply slipped past and continued forward.
At last, the stream bound all of the Kaguya clansmen.
Then, a voice echoed in everyone's ears.
"Water Release – Water Prison Technique!"
The flowing water suddenly erupted, forming a massive water prison that enveloped all the clansmen who had approached the shadow clone of Kurogane Ren.
Kurogane Ren then pressed his hand against the water prison. He had wanted to try this on Konan before, but had refrained out of concern that she might die. Now, he finally had a suitable opportunity—and with so many targets at once.
He licked his lips, a blood-red glint flashing in his eyes as he formed seals with one hand.
"Water Release – Spiral Current Burial!"
The once calm water inside the prison began to rotate. This rotation didn't follow a single direction—it spun based on the principle of the Rasengan, forming a violent spiral.
Within the Spiral Current Burial, the Kaguya clansmen were quickly torn apart by the rotating force. Soon, the entire water prison was dyed a vivid, eerie crimson.
When Kurogane Ren released the Water Prison Technique, what flowed out was not intact corpses, nor even fragments—only fine, sand-like particles.
Seeing this, a hint of surprise appeared in his eyes.
The brutality of this technique had exceeded his expectations. In terms of raw power, it couldn't compare to Wind Release: Rasenshuriken.
However, its chakra consumption was extremely low. Of course, its conditions were more demanding—it required trapping the enemy in a water prison first. But when combined with Water Release shadow clones and the Earth Release: Headhunter Technique, it could form a deadly combo.
And once caught in that combo, its brutality surpassed even the Rasenshuriken.
For example, if he could trap Kakuzu of the Immortal Duo inside, he could directly kill all five of his lives.
Of course, that was assuming he could trap Kakuzu in the water prison.
Kurogane Ren let out a breath of relief. Thankfully, he hadn't used this when trapping Konan. Otherwise, he had no idea how Nagato would have reacted—he might have gone berserk and sacrificed all his remaining life force to the Demonic Statue of the Outer Path just to kill him.
At that moment, another thought crossed his mind. Forget Kakuzu—Hidan of the Immortal Duo should be much easier to trap, right?
If he reduced Hidan to this state using Spiral Current Burial, would he still be able to live?
Since being buried underground could cause Hidan to die due to lack of energy, it meant his immortality also required some form of energy to sustain it. What kind of energy? Most likely chakra, or some special power granted by his evil god…
But if Hidan were shredded into such a state, would that energy still function?
If the opportunity arose, it would be worth testing, Kurogane Ren mused.
Even the caster himself was slightly shaken by the brutality of the scene, yet the remaining Kaguya clansmen—now less than half their original number—showed no fear whatsoever.
Even if they already knew they were no match for Kurogane Ren, giving up the fight was simply not an option.
Compared to death, they feared not being able to fight even more.
And so, they charged at him once again. They had no ninjutsu—only physiques far stronger than ordinary people.
To be honest, such physiques could deal with genin, and even pose some threat to chunin through sheer numbers. But against Kurogane Ren, they were utterly insignificant.
After a brief thought, Kurogane Ren decided to test another system.
He formed hand seals.
"Ninja Art – Hidden Mist Technique!"
In an instant, dense mist spread across the Kaguya clan's territory, obscuring everyone's vision. Kurogane Ren's figure completely merged into the fog.
His black eyes slowly turned blood-red, a single tomoe spinning rapidly within them.
That's right—this was the Sharingan!
A few months after Minato Namikaze became the Fourth Hokage, Kurogane Ren had finally completed his research on the Demon Bud Technique and successfully fused with Uchiha blood!
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