[Meanwhile]
Lex Luthor, once the epitome of wealth, power, and intellect, now sat alone in a dimly lit underground facility. This facility was Thawne's hideout which Lex took over after his death. This place was made in such a way that no outside technology could track it, including satellites or any high-end equipment. The only sources of light were the flickering monitors and the occasional spark from his workbench.
The synthesizing of the new kryptonite was near completion.
On the floor, lay green dust and chunks of green kryptonite of all sizes and shapes.
How did he obtain them?
Years ago, during one of his numerous expeditions to uncharted territories in search of new resources, Luthor stumbled upon a strange green mineral vein deep beneath the Earth's surface. At the time, he had no idea of its significance. It was just another mineral to be analyzed and cataloged. But as time passed, Luthor discovered that this mineral vein was not from Earth and there are no records of anything like it anywhere else on Earth. He didn't know what this mineral vein was, or where it came from. So, he continued his research on it for years, trying to find its origin and a way to use those green crystals.
However, with his sudden fall and almost dying in Batman's hands, his research remained unfinished.
The revelation of kryptonite's true potential came from an unexpected source: Eobard Thawne, the Reverse Flash. After he saved Lex, Thawne gave him with necessary blueprints and equipment to create countermeasures against all the superheroes on Earth. His first target was Superman.
Thawne's knowledge was extensive and precise, thanks to his AI and the fact that he was from the future. He explained the true nature of kryptonite and its devastating effects on Superman. With kryptonite, he could finally have a weapon capable of bringing the Man of Steel to his knees. But Thawne's assistance did not end there. He also provided detailed schematics for advanced weaponry and technology, including the plans for a mecha suit powered by kryptonite, and a weapon capable of eliminating Batman, undetectable by any technology.
Despite their successful collaboration, Thawne never revealed his true motive. He promised Luthor that he would reveal Batman's true identity, after that, he could use the weapon as he liked to take down the Bats. However, before he could fulfill this promise, Thawne met his end during the one-sided annihilation on the Atlantic Ocean. With his death, the secret of Batman's identity died as well.
Undeterred by this setback, Luthor threw himself into his work. The plans Thawne had left him were complex, requiring all of Luthor's engineering prowess to bring them to life. The kryptonite mecha was the crown jewel of his arsenal. This humanoid machine was designed to be a perfect blend of brute force and technological sophistication, capable of matching Superman's strength and agility.
The mecha's frame was constructed from a unique alloy that combined the resilience of titanium with the flexibility of carbon nanofibers. Its power core was a reactor fueled by a concentrated kryptonite shard, providing it with near-limitless energy and a constant source of Superman's only weakness. Plus, Thawne left some kind of unknown metal called Promethium which according to him is indestructible. Even Superman couldn't break it. But due to its low quantity, Lex developed kryptonite-coated bullets and frags made of the said metal to kill Superman or any other heroes as his last resort.
With Thawne's robots taking care of the job after Lex's touch-up, he shifted his focus to the next project. A weapon to kill Batman.
Batman was known for his reliance on technology, and any conventional weapon would be easily neutralized by his arsenal of gadgets and countermeasures. What Luthor needed was something that could bypass all of Batman's defenses, something that could not be detected or anticipated.
Following the blueprints and the materials left behind by Thawne, Luthor began designing a weapon that utilized principles of quantum mechanics and nanotechnology. The result was a gun that fired projectiles composed of nanobots, each one programmed to dismantle electronic systems at a molecular level. Once the projectile made contact, the nanobots would spread through the target's equipment, rendering it useless in a matter of seconds.
To ensure that the weapon remained undetectable, Luthor incorporated advanced stealth technologies. The gun's surface was coated with a material that absorbed all forms of electromagnetic radiation, making it invisible to radar and thermal imaging. Additionally, the weapon emitted a field that scrambled any attempts to scan or analyze it, effectively cloaking it from all known surveillance methods.
Although Thawne didn't give him much information on the nanites, and first wanted Lex to kill Superman, Lex couldn't care less, now that he's dead. After months of hard work, the gun and the mecha were finally completed.
However, Luthor wasn't done yet. His next project, The Wrap Bomb.
Among the most dangerous and ambitious of Thawne's designs was the warp bomb, a device capable of shattering the barriers of reality itself. Thawne had explained that the bomb could create a localized tear in the fabric of space-time, potentially opening a gateway to alternate dimensions or even destroying the very laws of physics that governed their universe.
Luthor couldn't wait to make this new bomb because this time should he fail in his revenge plan, he'd just blow up Earth.
The core of the warp bomb was a miniature particle accelerator, designed to collide particles at energies beyond anything humanity had ever achieved. The resulting reactions would generate an immense amount of energy, enough to tear through the dimensional barriers.
Constructing the warp bomb required materials and technologies far beyond what was available on Earth. Even Thawne failed to gather all the necessary equipment. Luthor had to rely on his vast network of contacts and his own ingenuity to procure the necessary components. He scoured the globe, searching for rare elements and advanced devices, often venturing into the black market and dealing with shady people while hiding his face from all.
It took him six months to finally get his hands on everything he needed.
For months, he ran simulations and conducted experiments, fine-tuning every aspect of the bomb's design. He consulted the notes and diagrams left by Thawne, trying to understand the theoretical principles behind the device. It was hard, but Luthor's fire for revenge never wavered.
Finally, after months of work, the warp bomb was ready. It was a small, unassuming device, barely larger than a briefcase. But Luthor knew that within its unremarkable exterior lay the power to reshape reality itself. He carefully sealed the bomb in a reinforced container and stored it in a secure vault, waiting for the moment when it would be needed.
With everything in place, Luthor initiated the final phase of his plan. He activated the kryptonite mecha and ran a series of final tests to ensure that it was fully operational. The mecha performed flawlessly. The kryptonite core glowed brightly upon activation, infusing the machine with incredible power. The advanced AI Thawne left him to control the mecha with ruthless efficiency, responding to Luthor's commands with a speed and precision that far surpassed anything a human could achieve.
"FINALLY!" Lex exclaimed in the empty facility.
His efforts had finally paid off. He now had the means to exact his revenge on Superman and Batman. No longer would he cower in fear. He would face them head-on and show the world that he was not to be underestimated.
However, his happiness was short-lived as he heard an unknown voice.
*"LEX LUTHOR."*
Lex spun around, looking for the source of the voice.
"Who's there?"
The facility's power suddenly cut off, plunging it into darkness. All the monitors flickered off, leaving only the eerie glow of the kryptonite mecha as the sole source of light. The air grew thick with tension as Luthor strained his senses, trying to figure out what was happening.
"Thank you for your hard work." A woman's voice echoed throughout the facility.
"Show yourself! Who are you!? Kugggg!" Before Lex could react, he felt something grab his neck tightly and lift him off the ground. He tried to pry the unseen assailant's grip, but it was futile. His attempts only worsened his predicament as he struggled to breathe.
[Stab!]
Suddenly, he felt a sharp pain in his back, followed by a spreading numbness. He looked down and saw a blade protruding from his chest in the dim light of the kryptonite. Blood dripped from the wound, staining his clothes and pooling on the floor. A warm feeling spread through his body as his vision began to fade. The woman softly put him down on the floor.
"Thank you for your service. A painless death, your reward."
"W-who...are ...you?" Lex managed to mutter weakly.
The lights came back on and Lex could finally see his attacker. She was a beautiful woman with long black hair and brown iris. Her attire consisted of a red shirt and a brown jacket, blue jeans, and knee-high brown boots. Behind her stood six other women in black attires.
"League of Shadows... I'm Lady Shiva. Consider it your honor to die by my hands today," The woman introduced herself with a cold, emotionless tone.
Luthor took his last breath...