The night was silent. Yet within Keiji's mind, storms raged.
The moment he asked the system for the Urumi sword art, it answered.
[Knowledge Transfer: Urumi Sword Art — Complete.]
Suddenly, torrents of information flooded him. His vision blurred, his heartbeat thundered, and countless images danced in his thoughts: warriors of southern India twirling flexible blades like whips, steel ribbons moving in deadly arcs, the glint of sun on coiling metal, the dance of death and elegance fused as one.
He saw training halls, secret manuals, diagrams of metallurgy, forging processes, combat drills. And more than that—he saw how to blend chakra into it. Chakra threads binding the blade's length. Chakra flow stiffening or softening the weapon. Fire to superheat, lightning to vibrate, yin to deceive.
It was not just knowledge of a sword.
It was the birth of a new combat style.
---
Forging Knowledge
Keiji sat cross-legged, his breath ragged, as the transfer ended. He clenched his fists.
So this is it… The Urumi. A whip-sword, infinitely dangerous even to its wielder, yet fluid beyond comparison. No rigid blade could match its unpredictability. If adapted with chakra… it could become unstoppable.
He recalled the forging process.
Core Metal: Strong yet flexible steel, resistant to both sharp stress and heat.
Chakra Ores: Rare minerals that resonate with chakra. When mixed in small proportions, they allow a blade to channel elemental energy without shattering.
Heat Treatment: Unlike ordinary swords, the Urumi required repeated heating, quenching, and hammering to balance flexibility and strength.
Construction: Multiple ribbons, each about three fingers wide, forged as long, whip-like blades attached to a single hilt.
But the system added more—knowledge no warrior of the past had known.
Chakra Weaving: The wielder could flow chakra along each ribbon, controlling its stiffness. In combat, one ribbon could behave like a whip while another like a sword, confusing enemies.
Combat Adaptation:
Fire Chakra could ignite the Urumi into blazing whips.
Lightning Chakra could charge them into vibrating cutters.
Yin Chakra could project illusions of multiple ribbons, masking the true strike.
The potential was limitless.
---
Sharing with Mother
The next morning, Keiji approached his mother. She was meditating in the garden, her katana laid across her lap, her long hair stirring gently in the breeze. Gengar floated nearby, humming a low tune, its eyes half-lidded in lazy amusement.
"Mother," Keiji began cautiously. "I… thought of a different kind of sword."
Unohana opened her eyes, studying him. "Different?"
He nodded. "Not a rigid blade. A flexible one. A sword that acts like a whip. It's called the Urumi."
Her brows lifted slightly. "A whip-sword? That sounds more like folly than art. A weapon that might kill its own wielder if misused."
Keiji smiled faintly. "Yes. But imagine a blade that cannot be predicted. A weapon that can coil around shields, slip past defenses, and attack from impossible angles. If infused with chakra, its potential multiplies."
Unohana's eyes narrowed. "You speak of it as though you've seen it used."
Keiji paused, then said carefully, "I have… studied old texts in the capital. Fragments of forgotten arts." It was a half-truth, enough to protect the system's secret.
For a long while, she was silent, weighing his words. Then, to his surprise, she chuckled softly.
"You are my son, after all. To think of such reckless brilliance."
Her tone hardened. "Very well. If you truly wish to forge this Urumi, we must experiment. But understand this, Keiji—if you fail to master it, it will be your death."
Keiji bowed deeply. "I accept that risk."
---
The Experiment Begins
They began work immediately. With her connections as both a healer and warrior, Unohana procured samples of chakra ores and mineral compositions used by Uchiha blacksmiths. Together, they inspected them one by one.
Tamashii Ore: A pale-blue mineral that resonated strongly with yin chakra.
Kaminari Steel Dust: Tiny fragments from lightning-forged blades, humming faintly with static.
Kaji Ash Stone: A black ore that absorbed fire chakra like a sponge.
Moon-Silver Alloy: A rare silvery metal used by Uchiha elites for ceremonial blades, prized for its elasticity.
Keiji ran his hands across them, recalling the forging blueprints from the system. "We need a base of Moon-Silver Alloy. Flexible but durable. Small proportions of Kaji Ash Stone for fire resonance. A thread of Kaminari Steel Dust for lightning. And… just a trace of Tamashii Ore, to allow yin chakra to flow."
Unohana examined him closely. "You sound as though you've already crafted such a weapon in your dreams."
Keiji smiled faintly. "Perhaps I have."
---
Approaching the Blacksmith
The next step was forging. And for that, they needed the best.
The Uchiha clan's chief blacksmith was an imposing man named Jirō Uchiha. Muscular, soot-stained, his hands were like hammers themselves. He had forged countless blades for the clan, each of impeccable quality.
When Keiji and Unohana approached his forge, the heat was suffocating. Sparks flew as Jirō hammered down on glowing steel. He looked up, surprised to see them.
"Lady Unohana. Young master Keiji. What brings you here?"
Keiji stepped forward. "I want a blade crafted. Not like the others. Something… new."
Jirō raised a brow. "New?"
Keiji spread out the ores and explained his idea carefully, even drawing diagrams of the whip-sword. "The Urumi. A sword that whips and cuts, guided by chakra."
At first, the blacksmith laughed, shaking his head. "A sword that bends like cloth? Impossible. You'd cut your own throat before your enemy's."
But as Keiji explained chakra flow, resonance of ores, and stiffening techniques, Jirō's expression shifted from disbelief to curiosity… and finally, to raw excitement.
"This…" Jirō muttered, eyes gleaming. "This is madness. And I love it."
Unohana folded her arms. "Can it be done?"
Jirō grinned, wiping sweat from his brow. "With these ores, and with time… yes. I can forge it. But it will take delicate work. Every ribbon must be hammered thin, flexible, yet strong enough to hold chakra. I've never attempted such a thing before."
Keiji leaned forward eagerly. "How long?"
Jirō slammed his hammer down, sparks flying. "Give me two days. Then, young master, you will hold in your hand a weapon that no shinobi in this era has ever seen."
---
Keiji's Thoughts
That night, Keiji lay in his futon, Gengar hovering protectively at his side. His mind raced with possibilities.
The Urumi… a sword art born of my past life, reborn here. If I master it, it will not only be my weapon, but my signature. Fire, lightning, yin… all channeled through steel ribbons. With this, I'll carve my own path in this world.
He clenched his fists. And with Gengar beside me, I'll prove to the clans, to my family, to the future itself—that destiny can be rewritten.
But even as he drifted to sleep, a whisper brushed against his thoughts. The system's voice, colder than usual.
[Warning: Urumi Mastery requires absolute control. Estimated survival chance during first combat test—42%.]
Keiji's eyes snapped open. His breath caught.
Forty-two percent. Less than half.
He swallowed hard, staring into the darkness.
The whip-blade of destiny was waiting.
Would it become his greatest weapon?
Or the instrument of his death?
---
End of the Chapter
---