The mission scroll arrived on a gray morning, delivered by Sakumo himself rather than the usual masked courier. The ANBU Commander's weathered face was troubled, his gray eyes carrying a weight that went beyond ordinary operational concerns. Seiji took the scroll and read it in the Senju garden, Mikoto's tea cooling on the table beside him, Akane's massive silver form sprawled across the grass. The koi were clustered at the far side of the pond, as always.
"Roran," Seiji said, his voice flat. "A mining town in the Land of Wind's eastern territories. Why does ANBU care about a mining town?"
"It's not the town. It's what's beneath it." Sakumo sat on the wooden bench, his white chakra saber resting across his knees. "The Dragon Vein. An ancient chakra source, older than the village system, older than the Sage of Six Paths, according to some legends. It's been dormant for centuries, but our sensors have detected unusual activity in the past weeks. Chakra signatures that don't match anything in our records. Pulsing. Growing."
"You believe someone is trying to harness it."
"I believe someone already has. A man named Mukade—a former puppet master from Suna who went missing after the Kazekage's defeat. He's been seen in Roran, and our intelligence suggests he's developed a technique to tap into the Dragon Vein's power. If he succeeds, he could level cities. Destroy nations. The Dragon Vein's energy is theoretically limitless." Sakumo's gray eyes met Seiji's pale ones. "I need you to investigate. Confirm Mukade's presence, assess the threat, and if necessary—"
"Eliminate him."
"Yes. But be careful, Seiji. The Dragon Vein is not like ordinary chakra. It's raw. Primal. The reports from the sensors suggest it's almost... alive. It responds to willpower. To emotion. To the deepest desires of those who touch it." He paused. "You've faced Kage and walked away. You've stopped the strongest spear with your own body. But this is different. This is something ancient and incomprehensible."
Seiji absorbed the information. The coiled thing in his chest stirred. An ancient power, dormant for centuries, now being tapped by a rogue puppet master. A threat to the fragile peace. He would eliminate it.
"I will leave at dawn," he said.
Akane raised her massive head, her golden eyes gleaming. I will accompany you, Seiji. The Dragon Vein sounds dangerous, and you are still recovering from the Raikage's wound.
"You are too large for this mission. If Mukade has harnessed the Dragon Vein, subtlety will be essential. I need to approach unseen."
I can be subtle when necessary. Her deep voice carried a hint of wounded pride. I am a predator. Predators know how to move unseen.
"This is different. The Dragon Vein's power is unknown. If it overwhelms me, I need you here—protecting the village. Protecting Mikoto." He met her golden eyes. "You are Konoha's guardian now. That is your function. Fulfill it."
She was silent for a long moment. Then, slowly, she lowered her head. I do not like this, Seiji. But I understand. I will protect the village in your absence. I will protect the she-cat. And I will be waiting when you return.
Mikoto's hand found his. "You're going alone? Into an unknown threat, with an ancient power that could level cities?"
"I have faced unknown threats before. I adapt. I survive." He met her dark eyes. "I will come back to you."
"You always say that."
"I always mean it."
She stared at him for a long moment. Then she nodded slowly. "Then come back. I'll have tea ready."
"I don't even like tea."
"You drink it because I make it. That's love." Her smile was soft, but her eyes were fierce. "Come home, Seiji. Whatever this Dragon Vein is, whatever this Mukade has become—you're stronger. You've always been stronger."
He touched her face, his cold fingers gentle against her warm skin. "I will return. I have too much to protect."
The journey to Roran took five days through increasingly arid terrain. Seiji traveled alone, his white mask packed away—he was not on an ANBU mission, not officially. This was reconnaissance, assessment, and if necessary, elimination. He moved through the desert with the silence of a predator, his Tenseigan active at low intensity, perceiving the distant pulse of something vast and ancient beneath the sands.
The Dragon Vein.
He felt it long before he saw Roran. It was a thrum in the earth, a vibration that resonated in his bones, in the coiled thing in his chest, in the ancient blood that flowed through his veins. His Tenseigan perceived its threads—not chakra, not exactly, but something older. Something primal. It was the pulse of the world itself, the lifeblood of the planet, flowing through veins of stone deep beneath the surface. And someone was tapping into it, drawing its power upward, shaping it into something terrible.
Roran appeared on the horizon, a cluster of mud-brick buildings and towering smokestacks. The mining town had seen better days—its streets were empty, its windows dark. The people who remained moved with the hollow efficiency of those who had given up hope. And at the town's center, rising from the largest smokestack, a pillar of purple chakra blazed into the sky, pulsing with malevolent energy.
Seiji perceived the threads of that energy through his Tenseigan. They were twisted. Corrupted. The Dragon Vein's natural flow had been diverted, channeled into a single point, and shaped by a will that sought only power. Mukade. The rogue puppet master had not merely tapped into the Dragon Vein—he had enslaved it, bound it to his purpose, and was using it to fuel something monstrous.
He found a vantage point on a rocky outcropping overlooking the town. Below, figures moved through the streets—not civilians, but puppets. Dozens of them, their wooden bodies clattering with each step, their blank faces turned toward the central tower. Mukade had turned Roran into his fortress, its people either fled or enslaved, its resources devoted to feeding his obsession.
Seiji's cold calculus assessed the situation. Mukade was the primary threat. Eliminate him, and the puppets would fall inert. The Dragon Vein would return to its natural flow. The immediate crisis would be resolved. But the Dragon Vein itself—that power, that ancient pulse beneath the earth—would remain. And Seiji could feel it calling to him. Not with words. Not with conscious intent. But with something deeper. Something that resonated with the Tenseigan, with the Otsutsuki blood that flowed in his veins, with the ancient legacy he carried.
You are of the blood, the Dragon Vein seemed to whisper. You are of the lineage that first shaped this world. You can command what this mortal merely borrows.
He pushed the thought aside. He was not here to claim power. He was here to eliminate a threat. That was his function. He fulfilled it.
He descended into Roran as night fell, his chakra suppressed to near-invisibility, his bone armor dormant beneath his skin. The puppets patrolled the streets in mindless patterns, their blank faces scanning for intruders. Seiji moved between them like a ghost, his Tenseigan perceiving the threads of chakra that animated them—thin, frayed connections to Mukade's central control. He could sever them easily. But doing so would alert the puppet master to his presence. He needed to reach Mukade first, eliminate him, and then deal with the Dragon Vein.
The central tower loomed ahead, its smokestack blazing with purple light. The air around it crackled with energy, the Dragon Vein's power so concentrated that it warped reality itself. Seiji's Tenseigan perceived the distortion—threads of space and time, twisted and tangled by the sheer force of the energy being channeled. Mukade was not merely tapping the Dragon Vein. He was tearing it open, ripping a wound in the fabric of the world, and using the bleeding energy to fuel his ambitions.
Seiji entered the tower. The interior was a nightmare of twisted metal and pulsing purple light. Pipes and conduits lined the walls, channeling the Dragon Vein's energy into a central chamber where Mukade waited. The puppet master was no longer entirely human. His body had been fused with his creations—mechanical limbs, armored plating, a half-dozen puppet arms extending from his back. His eyes blazed with purple light, the Dragon Vein's energy pulsing through him like a second heartbeat.
He saw Seiji and smiled. "Another intruder. The Kazekage sent you, didn't he? He wants my power. He wants the Dragon Vein for himself."
"The Kazekage is broken. His authority is shattered. He sent no one." Seiji's voice was cold. "I am here to eliminate a threat to the peace. You are that threat."
Mukade laughed, a harsh, mechanical sound. "Eliminate me? I am infinite! The Dragon Vein flows through me! I can see every moment, every possibility, every thread of time itself!" His puppet arms lashed out, each one tipped with a blade of purple chakra. "You cannot eliminate what has become eternal!"
The battle was brief and brutal. Mukade's puppet arms were fast, his chakra blades sharp, his connection to the Dragon Vein granting him regeneration that bordered on immortality. But he was not a warrior. He was a scientist, an engineer, a man who had stolen power he did not understand. Seiji had spent years honing his body and mind into the perfect weapon. He had faced Kage and walked away. He had stopped the strongest spear with his own body. A rogue puppet master, no matter how enhanced, was not his equal.
Seiji's bone threads severed the puppet arms one by one. His Gravitic Pulse disrupted Mukade's chakra flow, cutting off his connection to the Dragon Vein's regenerative power. His bone spike found the puppet master's heart, piercing through the mechanical armor, the fused flesh, the corrupted chakra network.
Mukade's purple eyes went wide. "No... I am eternal... I am... I am..."
"You are a threat. Threats are eliminated." Seiji withdrew his spike. "That is all."
Mukade crumpled, his mechanical body clattering to the floor. The purple light in his eyes faded and died. The puppets throughout Roran fell inert, their strings severed. The immediate threat was eliminated.
But the Dragon Vein remained. And it was still bleeding.
Seiji stood in the central chamber, his pale eyes fixed on the rift Mukade had torn in the fabric of reality. The purple light pulsed and writhed, raw energy spilling into the world like blood from an open wound. If it was not sealed, it would continue to grow, consuming Roran, the desert, perhaps the entire Land of Wind. Mukade had been a symptom. The Dragon Vein was the disease.
He approached the rift. The energy washed over him, tasting of eternity and nothingness, of creation and destruction intertwined. His Tenseigan perceived the threads of the Dragon Vein—vast, ancient, incomprehensible. They stretched back through time, back to the age when the Otsutsuki had first shaped this world. They pulsed with the heartbeat of the planet itself. And they recognized him.
Child of the blood, the Dragon Vein whispered, not with words but with pure intent. Child of the lineage that first walked this world. You carry the Heavenly Eye. You carry the bones of the first mother. You are of us. You can command us.
Seiji's cold calculus warred with something deeper. The Dragon Vein's power was immense. If he could harness it, even partially, he could protect his people in ways he had never imagined. He could become more than a blade. He could become a shield that no enemy could breach. But the power was also dangerous. Mukade had been consumed by it, twisted into something barely human. The Dragon Vein did not obey—it consumed.
"I am not here to command you," he said aloud. "I am here to seal you. To stop the bleeding. To restore the natural flow."
You could be so much more. You could see every thread of time, every possibility, every path that leads to the future you desire. You could protect your people not just from the threats you know, but from the threats that have not yet been born.
The offer was tempting. His Tenseigan perceived the truth of it—the Dragon Vein was not lying. It could grant him vision beyond vision, power beyond power. He could see every enemy before they struck. He could eliminate every threat before it materialized. He could become absolute.
But absolute power was not protection. Absolute power was what had corrupted the Kazekage, the Raikage, Hanzo, every enemy he had faced. They had sought to become invincible, and they had been broken. Seiji did not seek invincibility. He sought only to protect what mattered.
"No," he said. "I am not here for power. I am here to heal the wound Mukade tore in you. Show me how."
The Dragon Vein was silent for a long moment. Then, slowly, its energy began to shift. The bleeding rift started to close, the purple light dimming, the twisted threads of space and time untangling. Seiji's Tenseigan perceived the pattern—a natural flow, a rhythm that had been disrupted by Mukade's greed. He reached out with his own chakra, not to command, but to guide. To ease the Dragon Vein back into its ancient course.
And as he did, the Dragon Vein gave him a gift. Not power. Knowledge.
The natural energy of the world—the raw, primal chakra that flowed through the Dragon Vein—was not so different from the chakra that flowed through living beings. It could be balanced. Harmonized. Absorbed. The technique was ancient, predating the Sage of Six Paths, predating the Otsutsuki themselves. The original inhabitants of this world had learned to draw upon the planet's energy, to blend it with their own, to achieve a state of perfect harmony between self and world.
Sage Mode.
The knowledge flooded Seiji's mind—not as words, but as pure understanding. The Dragon Vein was not merely a power source. It was a conduit to the planet's own life force. Mukade had tried to enslave it. But Seiji had chosen to heal it. And in return, it had shown him the path to true mastery.
He opened his eyes. The rift was sealed. The Dragon Vein's energy flowed peacefully beneath the earth, its ancient rhythm restored. The purple light was gone. Roran was silent.
And Seiji understood. He would need to train, to practice, to learn to balance the planet's energy with his own. The Dragon Vein had given him the knowledge, but mastery would take years. He would need a teacher—someone who understood natural energy, who could guide him through the dangers of Sage Mode. The toads of Mount Myoboku, perhaps, or the snakes of Ryuchi Cave. But the foundation was there. The path was clear.
He walked out of the tower into the desert dawn. The sun was rising over the dunes, painting the world in shades of gold and amber. Roran was empty, its people fled or enslaved, its puppets inert. But the Dragon Vein was at peace. The threat was eliminated.
Seiji began the long walk home. He had a new mission now. Not to eliminate. To learn. To grow. To become more than a weapon. The Dragon Vein had shown him the way.
He would follow it.