The war camp sprawled across a valley that had once been farmland.
Tents in Konoha green dotted the muddy landscape, connected by wooden walkways that kept soldiers from sinking into the mire. The rain had followed them from Amegakure, lighter here but persistent, a constant drizzle that seeped into clothing and spirit alike.
Seiji stood at the edge of camp, watching the distant treeline. Somewhere beyond those trees, Hanzo the Salamander waited with his forces. The man who had single-handedly shaped Amegakure into a power that could challenge the great nations. The man who wore a poison mask because his own breath had become lethal.
"Brooding again."
Tsunade appeared beside him, her blonde hair darkened by rain. She wore combat gear now — armored vest, medical pack, her forehead protector gleaming. Behind her, two figures approached through the mist.
Orochimaru moved like a shadow, his pale skin luminous in the gray light. Beside him walked a tall man with wild white hair and red markings on his face, his expression caught between seriousness and barely contained energy.
Jiraiya.
"Tsunade says you're the one they're calling Kotsuhaku," Jiraiya said, looking Seiji up and down. "The White Bone Baku. You're smaller than I expected."
"I'm five."
"Right. That would explain it." He grinned suddenly, the expression transforming his face. "I like you already. Anyone who scares Amegakure that badly is good in my book."
"Jiraiya," Tsunade warned.
"What? I'm being friendly."
"Your 'friendly' usually ends with someone in the hot springs."
"That was one time."
Seiji looked between them, understanding dawning. These three were a team — had been for years. The easy familiarity, the way they positioned themselves without thought to cover each other's blind spots. They had fought together, bled together, survived together.
And today, he would fight beside them.
"The briefing," Orochimaru said, his voice cutting through the banter. "Hanzo's forces are dug in across the river. He's placed his elite guard at the bridge — the only crossing point for miles. We take the bridge, we break their defensive line."
"Just the four of us?" Seiji asked.
"The main force will engage their infantry. We're the strike team." Orochimaru's golden eyes gleamed. "Hanzo will reveal himself when the battle turns against him. He always does. When he appears, we engage."
"And we win?"
The three older shinobi exchanged glances. Something passed between them — a shared understanding that Seiji couldn't read.
"We survive," Tsunade said quietly. "Against Hanzo, that's winning."
---
The battle began at dawn.
Konoha's forces surged across the shallow river, churning the water to mud. Amegakure defenders met them with water-style jutsu and explosive tags, turning the crossing into chaos. Screams and explosions blended into a constant roar.
Seiji moved with the strike team along the flank, using the main assault as cover. His Tenseigan pulsed at the edge of activation, tracking chakra signatures through the chaos. Hundreds of golden threads wove through the battlefield — and with every moment, some of them flickered and died.
Don't think about it. Focus.
They reached the bridge.
Hanzo's elite guard waited — twenty shinobi in dark Amegakure colors, their faces hidden behind rebreather masks. Their formation was precise, disciplined. They had trained for this.
"Jiraiya," Orochimaru said. "Opening."
"On it."
Jiraiya's hands blurred through seals. Seiji's Tenseigan recorded every movement, every chakra shift, burning the sequence into memory.
"Fire Style: Flame Bullet!"
A torrent of fire roared across the bridge, forcing the guards to scatter. Before they could regroup, Tsunade was among them. Her fist hit the ground, and the world shattered.
Seiji had never seen strength like this. The bridge cracked, stone exploding outward. Two guards went flying, their bodies broken by the shockwave alone. Tsunade moved through the chaos like a force of nature, each strike devastating.
So this is what a Sannin can do.
"Seiji!" Orochimaru's voice snapped him back. "Left flank. Three approaching."
He moved.
The first guard saw him coming — a child with silver-white hair and dead eyes. His hesitation cost him. Seiji's bone spike extended from his palm and took him through the throat before he could raise his kunai.
One.
The second guard was faster. She came in low, a water whip forming in her hands. Seiji ducked under the first strike, felt the second graze his shoulder. Pain flared, but his bone armor was already forming — plates of white erupting from his skin to deflect the next blow.
He closed distance. His palm struck her solar plexus, and a bone spur extended from his wrist into her chest.
Two.
The third guard tried to flee. Seiji's Shadow Clone appeared in his path — not one, but two clones, their bone structure visible beneath translucent flesh. The guard's eyes widened in terror.
"Kotsuhaku—"
The clones struck together. He fell without another sound.
Three.
Seiji dismissed the clones and turned back to the bridge. The elite guard was broken — bodies scattered across the stone, the survivors retreating. Jiraiya stood at the center, his hands still smoking from his last jutsu. Tsunade was already treating Orochimaru, who had taken a shallow cut across his ribs.
"Not bad, kid," Jiraiya called. "You fight like someone twice your age."
"I've had good teachers."
"Flattery. I like it."
The air changed.
Seiji felt it before he saw it — a chakra signature approaching from the far side of the bridge. Massive. Dense. Unlike anything he had sensed before. The golden threads of this presence were woven with something darker, something toxic.
Hanzo.
He emerged from the mist like a specter.
Hanzo the Salamander was not tall, but he carried himself like a giant. His dark armor was practical, worn, stained by countless battles. The rebreather mask covering his lower face gave him an inhuman quality — part man, part machine, part something else entirely. His eyes, visible above the mask, were cold and assessing.
And on his back, coiled and waiting, rested his summon.
The salamander. Ibuse.
"So," Hanzo said, his voice slightly distorted by the mask. "Konoha sends children to fight me now."
"Children who killed your elite guard," Orochimaru replied, straightening despite his wound. "Perhaps you should reconsider your recruitment standards."
"Bold words from a man who hides behind a boy with bone blood." Hanzo's gaze shifted to Seiji. "You're the one they call Kotsuhaku. The White Bone Baku. I've heard stories."
"They're exaggerated."
"Are they?" Hanzo's eyes narrowed. "We shall see."
He moved.
Seiji had faced fast opponents before. Minato's speed was legendary, even as a child. But Hanzo was different. He didn't just move fast — he moved inevitably, like a natural disaster. His kusarigama appeared in his hand, the weighted chain lashing out in a blur.
Seiji's bone armor caught the strike. The impact sent him skidding backward, cracks spreading through his skeletal plates.
Too strong. Too fast.
"Seiji!" Tsunade was already moving, her fist cocked back. Hanzo sidestepped her strike with contemptuous ease, his kusarigama's blade opening a gash across her arm. She stumbled, blood spraying.
"Tsunade!" Jiraiya's hands flew through seals. "Earth Style: Dark Swamp!"
The ground beneath Hanzo turned to liquid mud. He sank to his knees — then exploded upward, the swamp unable to hold him. His counter was instantaneous. "Water Style: Water Dragon Jutsu!"
A serpent of water roared toward Jiraiya. He barely dodged, the dragon's teeth grazing his shoulder.
Orochimaru attacked from behind, his tongue extending impossibly, a snake hidden in his sleeve striking at Hanzo's neck. Hanzo caught the snake mid-strike and crushed it. His kusarigama's chain wrapped around Orochimaru's arm and pulled, slamming the pale shinobi into the bridge.
Three Sannin. Three attacks. All neutralized in seconds.
We can't beat him like this.
Seiji's mind raced. His Tenseigan was fully active now, silver-crimson light blazing from his eyes. He could see Hanzo's chakra network — vast, complex, laced with something toxic that pulsed through his entire body. Poison. Hanzo's body produced poison naturally.
That's why he wears the mask. His own breath is lethal.
But poison meant biology. Biology meant bones.
Seiji's hands moved through seals — not copied this time, but created. A technique he had been developing in the quiet hours, inspired by Tsunade's medical theory and his own unique perception.
"Bone Garden Jutsu."
The bridge erupted.
Not from below — from within. Seiji's chakra flooded into the stone, and bones grew. Not his own bones this time. He had learned to manipulate the calcium in the environment, to catalyze growth from inorganic material. The bridge's stone contained traces of ancient shells, fossilized remains, the bones of creatures that had died millennia ago.
He woke them.
Spikes of white erupted between Hanzo's feet, forcing him to leap. More bones grew where he landed, a forest of skeletal trees sprouting from dead stone. The technique was imperfect — the bones were brittle, easily shattered — but there were so many of them. An endless garden of white.
Hanzo's kusarigama swept through them, shattering dozens at a time. But they kept growing. Kept reaching. Kept trying to entangle him.
"What is this?" Hanzo demanded, his composure cracking for the first time. "This isn't Kaguya bloodline. This is something else!"
"Something new," Seiji said.
While Hanzo was distracted, Jiraiya completed his seals. "Toad Oil Bombs!"
Sticky oil coated Hanzo's legs, weighing him down. The bone garden grabbed at him, oil-slicked spikes adhering to his armor.
"Now!" Jiraiya shouted. "Fire Style: Flame Bullet!"
The oil ignited.
Hanzo vanished in a pillar of fire. For a moment, Seiji dared to hope.
Then the flames parted.
Hanzo stood unharmed, his body flickering. Not teleportation — substitution. A water clone, already dissolving. The real Hanzo appeared behind Jiraiya, his kusarigama already swinging.
Seiji moved.
Not with his body. With his will.
The silver light in his eyes flared brighter than ever before. He reached out — not physically, but through the medium of his Tenseigan — and grabbed the golden threads of Jiraiya's life force.
Pull.
Jiraiya's body jerked sideways, yanked by an invisible hand. Hanzo's blade passed through empty air.
"What—" Jiraiya stumbled, catching himself. "What was that?"
Seiji didn't answer. His nose was bleeding. His vision blurred. Manipulating another person's life force directly was something he had only theorized. The strain was immense.
But it had worked.
"You," Hanzo said, turning to face Seiji fully. "You're not just a bone user. You see the threads. You touched them."
"Yes."
"That power... it's Otsutsuki. Ancient. Forbidden." Hanzo's eyes narrowed. "You're more dangerous than I realized."
"Then surrender."
"Surrender?" Hanzo laughed — a harsh, mechanical sound through his rebreather. "Boy, I am Hanzo the Salamander. I have never surrendered. I never will." He raised his hand. "But I will acknowledge you. All of you."
He looked at the four of them — Tsunade, wounded but standing; Jiraiya, singed but defiant; Orochimaru, bleeding but calculating; and Seiji, silver-eyed and bleeding from his nose.
"You fought well. Better than most." Hanzo lowered his hand. "I will remember this battle. I will remember your faces. And because you have shown me something rare — true talent, true courage — I will let you live."
"You're letting us go?" Tsunade demanded.
"The battle is over. Your main force is retreating. My forces are spent." Hanzo's gaze swept the bridge, the bodies of his elite guard, the bone garden still growing in slow pulses. "This engagement serves no further purpose. Take your wounded. Leave my country."
"And if we refuse?"
"Then I will summon Ibuse." Hanzo's hand touched the coiled salamander on his back. "And none of you will leave this bridge alive."
Silence.
Orochimaru stepped forward, his golden eyes meeting Hanzo's dark gaze. "We accept your terms. For now."
"Wise." Hanzo turned away, his cloak billowing in the rain. "Grow stronger, children of Konoha. The next time we meet, I will not be merciful."
He vanished into the mist.
---
The retreat was silent.
Seiji walked beside Tsunade, who had insisted on treating his nosebleed despite her own wounded arm. Jiraiya supported Orochimaru, their earlier tension replaced by shared exhaustion. Behind them, Konoha's forces withdrew in orderly fashion, carrying their dead.
"We lost," Nawaki said. He had joined them after the bridge battle, his face pale with worry. "We actually lost."
"We survived," Tsunade corrected. "Against Hanzo the Salamander, survival is victory."
"But he just... let us go."
"Because we impressed him." Jiraiya's voice was bitter. "He acknowledged us. Gave us his blessing to grow stronger." He spat. "Like we're his students or something."
"Maybe we are," Orochimaru said quietly. "In a way. He saw potential in us. Potential he wanted to face again someday."
"That's insane."
"That's Hanzo."
Seiji listened to them talk, his mind still processing what he had done. The bone garden. The life-thread manipulation. His Tenseigan had evolved during the battle — he could feel it. Stage three, perhaps. The technique replication ability was sharper now, and the gravitational pulse stirred at the edges of his awareness.
But more than power, he felt something else.
I faced a legend and survived.
Hanzo the Salamander knew his name. Knew his face. Had called his power "Otsutsuki" — a word Seiji had never heard before.
What am I becoming?
He didn't have an answer. But as the rain fell and the Konoha forces limped home, he made a silent vow.
Next time, I won't just survive. Next time, I'll win.