I Died in a Knife Fight and Reincarnated into Jujutsu Kaisen

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It took two sleepless nights filled with relentless tinkering, three distinct prototypes moulded from failure and fresh ideas, and a perseverance that Alex almost didn't recognise in himself, but he did it. As he sat amid the clutter of his cramped dorm room, the air felt thick with the metallic scent of burnt steel, mingled with an undercurrent of ominous energy that hinted at the arcane. Before him, meticulously arranged on a cloth-lined table, lay the finished product: a dagger, crafted not merely from steel, but from focused intent and hard-earned skill.

The blade shimmered delicately in the dim light, its jagged edges intricately embedded with delicate veins that pulsed with the potential to channel Alex's cursed aura. This was no ordinary weapon; it possessed a raw hunger. When he hovered his fingers over it, he felt as if the metal had a heartbeat, as if it was alive with anticipation for its first taste of battle. 

With the prototype complete, his next challenge loomed larger than any obstacle he'd faced before: he needed to sell it.

"You want my clan to purchase weapons from you?" Gojo inquired, tilting his head, his blue eyes alight with both amusement and intrigue. Alex took a breath, steadying himself before placing the dagger with careful intention on Gojo's polished desk.

"Not just weapons," he asserted, his voice firm with conviction. "Tools crafted to cut better, endure longer, and strike harder than any weapon you currently possess."

Gojo picked up the blade with a measured delicacy, inspecting its structure as if he were appraising a piece of fine art. The cursed aura that enveloped the dagger curled around his fingers like ethereal mist, hissing softly as if it held secrets of its own.

"Not bad craftsmanship," he admitted, his voice laced with scepticism. "But my clan isn't known for sourcing gear from outsiders. Especially not ones claiming to be talented."

"Then show them," Alex urged. "Let them test it firsthand. If it fails, I accept your rejection without question. If it succeeds…"

"They'll pay," Gojo finished, an easy grin spreading across his features. "Alright. I'll present it at the next clan meeting, but don't get your hopes up, those old men hate being proven wrong."

A few days later, in the hallowed halls of a Gojo Clan compound, Alex's dagger lay poised on a white silk cloth, stark and striking against the fabric. Seated around a long table were five elders, their presence exuding an aura of quiet menace steeped in ancient power. Behind them stood several younger clan members, including jujutsu researchers and curse testers, arranged in a respectful half-circle, their gazes fixed on the blade.

Gojo lounged at the end of the table, arms crossed, casually chewing gum. "Gentlemen," he began, his tone casual but underscored with authority. "You asked for proof of concept. This is the prototype: a cursed weapon crafted by one of my students, infused with a unique cursed aura."

One elder leaned forward, narrowing his eyes at the blade as if it were an enigma to be unravelled. "A student?"

"An outsider," another elder added, disdain evident in his tone.

"Even worse," grumbled a third elder, furrowing his brow. "And you expect this to be… superior to the weapons we already wield?"

"You're free to test it," Gojo replied nonchalantly, unfazed by their scepticism.

With a collective air of hesitation and curiosity, they moved the dagger to a controlled training hall. Inside, several cursed spirits had been ensnared and bound within reinforced glass cells, thrashing and screeching in their confinement.

The first tester, a middle-aged man dressed in the clan's uniform, stepped forward with a sceptical air. He lifted the weapon, and immediately his arm twitched involuntarily as a surge of power coursed through him, invigorating yet foreign.

"Feels heavier than it looks," he muttered under his breath, steeling himself.

He approached a Class 2 cursed spirit, which was contained within a glass barrier. "Standard slash," commanded one of the researchers, his pen poised for notetaking.

The tester slashed with conviction, and the blade sliced through the barrier effortlessly. The cursed spirit emitted a tormented howl, black blood erupting from its form as it shrivelled and convulsed violently upon impact.

The elder's eyebrows rose slightly, a flicker of intrigue breaking through his stoic veneer. "It severed regenerative tissue in one strike."

"Let's try a tougher opponent," suggested another elder, eager to test the weapon's limits.

Another tester stepped up, facing off against a Grade 1 curse that lunged at the glass with feral aggression, snarling in fury. 

"Attack formation," the elder commanded, his voice firm, eyes locked on the unfolding test.

The tester braced himself, jabbing the dagger forward with precision. It pierced through the curse's thick skin with astonishing ease, causing the creature to spasm before falling silent within seconds.

"The curse's energy was destabilised," a younger observer noted, awed. "The blade didn't just cut, it disrupted the core."

"That's thanks to the resonance signature," Gojo interjected, clearly excited. "Alex's cursed aura doesn't merely injure, it twists the very nature of the curse's flow, like injecting poison into its bloodstream."

The elders exchanged glances with newfound intrigue. 

"Still just one weapon," cautioned one elder dismissively. 

"Let's subject it to a durability test," another elder proposed.

They proceeded to run a simulated defence drill. The blade parried three high-impact blows from standard cursed weapons without even the slightest fracture. It sparked under the force but remained steadfast; the metal was unyielding, and the aura remained intact. 

Then came the control test. A volunteer was asked to channel cursed energy into the blade, and after a brief moment of focus, he exclaimed, "Flow's clean! More responsive than my own tanto. It amplifies my strikes." 

The atmosphere shifted; even the more cynical elders could sense the potential.

Finally, one elder spoke up. "We'll test it against a semi-special grade. If it survives that, we can discuss numbers."

A semi-special grade cursed spirit was ushered in as an abomination with ever-shifting limbs and armour-like skin that seemed to radiate malice. The room fell into a tense silence.

The tester paused, uncertainty creeping in. 

"We'll let one of the younglings try," the elder decreed, eyes sharp and calculating. 

A young Gojo clan member, barely eighteen and visibly nervous, stepped forward. But determination transformed his expression as he took the dagger. "I'll do it."

With fear yet resolve, he approached the cage where the cursed spirit lurked. In a flash, the creature lunged, but the young man was faster, striking with instinct that seemed to bypass fear altogether.

One slash.

Then another.

Finally, a decisive plunge straight into the core.

The cursed spirit collapsed instantly, its unnatural energy dissipating as the dagger absorbed the residual aura around it.

For a moment, silence enveloped the room.

"... It's still sharp," the young man panted, breathing heavily from the adrenaline coursing through him.

Finally, one elder rose, his expression contemplative. "How many can he make?"

Gojo's grin widened, brightening the atmosphere. "Two hundred, if you're buying."

"What's the price?" the voice inquired, breaking the heavy silence that had settled over the room.

"Two billion yen total," came the measured reply, the weight of the number hanging in the air like a leaden cloud.

A stillness enveloped the space, thick enough to cut, before a low chuckle punctuated the tension. "That's... expensive," one of the men admitted, an edge of disbelief in his tone.

"But effective," another voice chimed in, unable to completely conceal a hint of begrudging admiration for the audacity of the deal. The atmosphere shifted slightly, an unspoken acknowledgement of the gravity of the investment being considered.

"All right, we'll place the order," the first man stated decisively, his voice regaining some of its authority. "Full testing reports will follow to ensure everything operates as promised."

Outside, Gojo strolled into the cool air like a breath of fresh relief. He spotted Alex leaning casually against a weathered brick wall, arms crossed and a focused expression on his face, as if he had been waiting intently for this moment.

"They're buying," Gojo said simply, the corners of his mouth twitching upwards in a hint of a smile, satisfied with the outcome.

Alex gave a short, almost imperceptible nod, his demeanour still composed but revealing a glimmer of satisfaction. "Good," he replied, the single word carrying the weight of a shared victory.

Gojo smirked, his eyes gleaming with mischief. "You just made more money than most jujutsu sorcerers will see in their entire lives," he quipped, teasing him lightly about the astronomical figure involved.

A faint, satisfied smile crept onto Alex's face, his usual stoicism giving way to a rare moment of triumph. "Let's see how long it lasts," he said, a hint of cautious optimism lacing his tone as he glanced off into the distance, contemplating the possibilities ahead.

As the scene blurred and the sounds of the city enveloped them, the camera faded to black, leaving the promise of their future endeavours lingering in the air.