A spike.
While it sounded incredibly primitive, this was the exact weapon Suzuki had chosen. It was brutally simple, yet devastatingly lethal. All he needed to do was stab his opponent.
More importantly, when he combined this specific weapon with his pseudo-King Crimson ability—Frame Deletion—he essentially transformed himself into a human armor-piercing tank shell (an APFSDS round).
Instead of treating the spike like a knife and trying to slash with it, the goal was pure, unadulterated penetration. This was explicitly designed to counter opponents with impenetrable defenses, specifically elite sorcerers who reinforced their bodies with dense layers of Cursed Energy. If Suzuki punched a sorcerer wearing the equivalent of magical Kevlar, the wide surface area of his fist would disperse the kinetic impact, allowing their armor to absorb the blow.
Suzuki simply applied the fundamental physics of pressure:
P=F/A
In this equation, P is pressure, F is force, and A is the area over which it is applied. This principle dictates that pressure is directly proportional to force and inversely proportional to surface area.
What did that mean in practical combat?
Larger Area = Lower Pressure: If you distribute a massive force over a wide area (like stepping on snow with snowshoes or throwing a wide punch), the pressure drastically decreases.
Smaller Area = Higher Pressure: If you apply that exact same force to a microscopic area (like stepping on a needle), the resulting pressure increases exponentially.
Suzuki's spike was incredibly small. By concentrating the immense, Mach-speed kinetic energy generated from Frame Deletion into a single point with almost zero surface area, the resulting physical pressure reached infinite, catastrophic levels.
The result?
The spike would entirely ignore Cursed Energy reinforcement. It wouldn't just cut flesh; it would forcefully displace matter. If he pushed it toward a Sorcerer's collarbone or a Special Grade Curse's skull, it would slide through their reinforced bone like a red-hot needle through butter, instantly severing nerve clusters and permanently shutting down their motor functions.
This specific physics application was exactly why he had chosen tungsten as his material. It is a dense metal boasting exceptional heat resistance and unparalleled hardness.
So, why hadn't he simply bought one earlier? Why wait for Mai to forge it?
Because manufacturing weaponized tungsten is an absolute metallurgical nightmare.
In the real world, tungsten possesses the highest melting point of all metals—roughly 3422°C. This makes it incredibly difficult to cast, and it is notoriously brittle if not alloyed with absolute, microscopic perfection. If Suzuki had commissioned a normal factory to mill the spikes, the metal would possess micro-fractures and instantly shatter upon Mach-speed impact.
Mai's Construction Sorcery completely bypassed the flawed laws of standard metallurgy. She could mentally visualize a flawless, single-crystal tungsten lattice and spawn it directly into reality. Using her innate technique, she had manifested a perfectly smooth, indestructible eight-inch tungsten stake that tapered to a lethal point only a few atoms wide.
"Why did you choose this specific weapon?" Maki asked, tilting her head. "Are you going to imprint it with a special ability or a cursed technique?"
Maki loved cursed tools, and because of that, she was genuinely baffled. Why would Suzuki—arguably the smartest, most calculating guy she knew—choose the most primitive weapon imaginable and burn her sister's limited Cursed Energy to create it?
"No. None at all," Suzuki replied smoothly, twirling the heavy spike between his fingers. "This thing doesn't have any special abilities, magical attributes, or hidden tricks. It is just an incredibly hard, incredibly sharp spike. That's it."
"..."
"..."
Both sisters stared at him in complete silence.
"...Then what is the actual use of it?" Mai asked, crossing her arms defensively. She might have been the one to forge the tungsten spike, but even she felt the weapon was practically useless. Its shape was too simple. Aside from being hard to melt, it held zero magical value.
"Isn't that enough of a reason for me to choose it?" Suzuki smiled faintly.
"....."
Suzuki sighed, pointing the blunt end of the spike toward the older twin. "Look at Maki. She has absolutely zero Cursed Energy. Do you think she is weak?"
"....."
While Mai remained stubbornly speechless, Maki's eyes widened as the realization hit her. "I see! This weapon operates just like me!"
"What do you mean?!" Mai snapped, looking back and forth between them. "Why do you immediately understand?! You're making me feel stupid!"
"...." Maki just smirked quietly.
"You understand the mechanics of Maki's Heavenly Restriction, right?" Suzuki asked, looking at Mai.
"Of course I do."
Even if Maki completely lacked Cursed Energy, Mai inherently knew her sister was vastly stronger than her. While she hated admitting it, standing next to Maki always made her feel utterly useless. Despite possessing Cursed Energy, the absolute limit of Mai's power was painfully constructing a single bullet a day.
Meanwhile, because Maki had been stripped of all magical energy, her physical prowess had violently skyrocketed. She possessed the raw, terrifying strength of a mythological demigod.
But more importantly, because Maki had absolutely zero Cursed Energy, it was practically impossible for modern sorcerers to detect her.
Why? Because according to the fundamental laws of Jujutsu, Maki Zenin was not a person. She was a building. She was a rock. She was an inanimate object.
Sorcerers were strictly trained to dodge lethal attacks by sensing the "spark" of Cursed Energy that flared right before a technique was fired. Because Maki possessed no spark, an enemy's Jujutsu instincts would falsely report that they were perfectly safe. By the time their biological eyes actually registered the physical glint of her metal blade, their head was already rolling on the floor.
The tungsten spike Suzuki had chosen perfectly mirrored her existence.
First, it was physically unbreakable, much like Maki's reinforced body. Second, it was entirely invisible to Jujutsu senses because it held no cursed signature. When Suzuki activated Frame Deletion and teleported into an opponent's blind spot, their magical radar wouldn't detect a threat. Before their human eyes could even register the shift in the air, the eight-inch tungsten spike would already be fatally embedded in their brain stem.
"So, do you understand why I chose this weapon now?" Suzuki asked softly.
"Ah... um, yes," Mai nodded dumbly, her eyes drifting over to her sister.
Over the past week of intense training, while Mai had been relegated to a supporting role, Maki's raw physical strength had grown exponentially. She moved with the ruthless, mechanical efficiency of a futuristic cyborg assassin.
Even Suzuki had to quietly admit that if he didn't possess the Manager—which constantly mapped Maki's blind spots, predicted her explosive movements, and mathematically calculated the exact millisecond her guard dropped—fighting her would be an absolute nightmare.
Simple is always best.
Compared to his own complex Frame Deletion, which required high-level physics and intense IQ to master, Maki's Heavenly Restriction was wonderfully straightforward. To make Maki stronger, all Suzuki had to do was guide her toward absolute bodily mastery. He knew with terrifying certainty that once she fully unlocked her physical potential, 99.9% of the Jujutsu world would be helpless against her. Unless she was fighting Satoru Gojo—whose Infinity made him untouchable—she was a walking executioner.
If she acquired a Special Grade cursed tool, she would be unstoppable, Suzuki thought to himself. Especially if she wielded the Inverted Spear of Heaven. That blade can forcibly nullify any technique, rendering all sorcery completely meaningless.
However, recreating or purchasing a weapon of that caliber would require an astronomical amount of capital, causing Suzuki to suppress a heavy sigh.
"Anyway, that's enough talk about us," Suzuki said, turning his full attention toward the younger twin. "Now, it's time to focus on you, Mai."
"Eh? Me?" Mai blinked, pointing a finger at her own chest. "Do you want me to construct another spike for you?"
In Mai's depressed, self-deprecating mind, her only role in this rebellion was acting as a glorified blacksmith. She firmly believed she could never grow strong, especially since her innate technique heavily restricted her Cursed Energy reserves.
"No," Suzuki smiled, his eyes gleaming with calculated intent. "We are going to make you stronger."
"...." Mai stared at him blankly.
"Eh?"
---
No, Mai won't just make three bullets a day.
Still, welcome to JJK!