Villain: Ultimate Mutation System in the Alternate World

It offered simple explanations and diagrams for fixing engines, a practical guide for anyone needing to tinker with their machines.

But for Reign, the engine repair manual proved to be more than just a practical resource—it held knowledge he needed.

It might seem a bit off for Reign to study machinery despite having a mutation system, but he believed it was the right path.

Inspired by the fact that human inventions often mimic nature, like planes borrowing from bird flight, he saw a chance to merge the capabilities of his mutation system with modern science.

He had a feeling that even the system didn't anticipate him utilizing its abilities in this manner.

It reinforced his belief that sometimes, thinking outside the box could unlock even greater potential.

With that in mind, he poured over its contents repeatedly, absorbing the intricacies of engine mechanics.

His fascination surpassed mere curiosity; it became an obsession as he dug deeper into the world of internal combustion engines.

Next.

Driven by an insatiable thirst for knowledge, he sought out a suitable vehicle to put theory into practice. He scoured the place until he found a truck.

With determination in his eyes, he set to work, meticulously disassembling the engine piece by piece.

Each bolt he removed, each component he inspected, provided a new layer of understanding.

He went to the extent of mimicking the bolts and creating bone counterparts, envisioning their utility in his future projects.

The, he dismantled the engine, methodically laying out each part before him.

The oily scent of machinery filled the air as he immersed himself in his task.

Finally, he grasped the general idea of how this things worked.

Previously, all his original skills were mostly from guessing, relying on his IQ to find logic, and fill the hole on his blueprint.

But with the detailed diagrams, experimentation and explanations provided in the book, his understanding of engines solidified.

'Time to work,'

Designing a more intricate mechanical integration, he envisioned attaching an external engine to his Skull Grinder Skill.

Instead of the complex four-stroke cycle that usually used by cars, he opted for a simpler push-pull, two-stroke action, maximizing power with minimal complexity.

Before, he relied solely on his raw energy to power his chainsaw-like sword, forcing it to move through sheer brute strength .

But now, with his own custom-built engine integrated into the weapon, things had changed drastically.

Thanks to the efficiency of the engine, Reign found that he only needed to expend a fraction of his energy—just 30% compared to before—to achieve the same level of output.

How did he do it?

Within the customized cylinder of the external engine, he replaced air with Negative Energy and fuel with Flame Energy, sparking a powerful chemical reaction.

Then he upgraded the "rod and crank" responsible for piston motion and rotation.

He also add his own version of a guide bar, to ensure that the chainsaw would expel stuck meat and bones from the cutting teeth effortlessly.

With meticulous attention to detail, the sword grew bulkier and larger, but Reign's strength made wielding it effortless.

The external design was sick, with bony dark red metallic material, and the engine adorned with a Skull Cover, it look like a chainsaw made from the deepest pit of hell itself.

The skull's eyes also emitted flames whenever Reign cranked the thing up. And because he used Lightning energy there was an added buzzing sound whenver he crank the long trigger in the hilt,

[System: Detected that your Skull Grinder had undergone huge improvement]

[Would you like to rename it ?]

"Skull Grinder Carnage!"

[Skull Grinder Carnage- Saved]

Vrrrrrrrrrmmm. !

Vrrrrrrrrrmmm. !

Vrrrrrrrrrmmm. !

The Skull Grinder Carnage roared to life, its vibrations intensifying with each passing moment.

As he poured more energy into its engine, the cutting teeth spun faster and faster, reaching a super fast rpm that set the air abuzz.

Soon, the spinning motion generated a powerful wind, swirling around him.

'Let's test it,'

Leaping from the balcony, he scanned the surroundings until his eyes settled on a suitable target—a sturdy big boulder that was formed naturally.

With his Skull Grinder Carnage humming with power, he landed gracefully in front of the boulder.

And with a powerful swing, he brought down his weapon on the hard stone without putting much force into it.

SLASH!

The Skull Grinder Carnage, fueled by his energy and high rpm blades, tore through the stone as if it were mere tufo.

The once hard boulder crumbled before his unstoppable weapon, its resistance almost non existent .

"Too sharp," Reign marveled at the cleanliness of the cut. It looked as if the stone had been sliced by an industrialized laser.

This upgraded Skull Grinder Carnage would render hunter swords and most forms of shields useless.

With its immense cutting power, one swing was enough to slice through everything, including the body of his target.

'I'll test it more,'

After swinging the Skull Grinder Pro for a bit and familiarizing himself with it, he found that this weapon would be his go-to choice against powerful enemies that would engage him in close combat.

Now that he had a trump card for close combat, it was time to upgrade his long-distance arsenal.

"Buster Mode"

The energy consumption of this particular skill was excessively high, making it unsuitable for confronting quick enemies that could dodge the projectiles or using it to engage in close quarter combat. MVLeMpYr-com-story

However, against sluggish but durable armored enemies, it would be the ideal skill to use.

Hypervelocity projectiles were one of the best weapons for piercing hard armor, even in his previous world.

But even so, he still needed to improve it.

'I need to increase my mobility ,' He thought to himself, as it was the most obvious weakness of Buster Mode.

He shut his eyes again, envisioning a new blueprint for a lower exoskeleton.

Rather than relying on a spinning pole on the ground, he decided to extend and expand his legs to make it easier for him to move around.

Additionally, he integrated gears made of bones into the knee section, enabling him to rotate a full 360 degrees without needing to shift his entire legs.

With the modifications complete, he awaited a notification.

However, none came.

It seemed his alterations didn't warrant any acknowledgment from the system.

He wasn't disappointed about it because the notification only involved changing names, so he didn't lose anything at all.

In fact, this was better because now he would have a way to gauge if the improvements were huge or not.

The last item on his agenda was to upgrade his Death Rail Gun, which remained his most powerful weapon.

Regrettably, the available resources offered little details on how to enhance it. So, his improvements were limited.

In the end, he only managed to boost its efficiency by a modest 10% and reduce its consumption rate by 15% using some of the insights he gained from reading and disassembling the engine.

"I'm ready to leave this place," Reign declared as he walked toward the balcony.

Although it might have seemed like only a few hours had passed, it had been more than a day since he started reading, studying, experimenting, and finally modifying his skills.