Marvel: Sign-In System – Starting with the Glint-Glint Fruit

Another reason Ivan's attitude had softened was because of his father.

Matthew had quickly fulfilled his promise.

He brought Ivan's father to the villa and arranged for an extremely professional medical team to begin treatment almost immediately.

Even someone like Ivan felt his scalp go numb after seeing those advanced medical devices.

They were all cutting-edge technologies from the very peak of the medical industry.

Many of those machines couldn't be bought even with money.

Especially since this was Russia.

Because of the global political situation, Russia had long been subjected to sanctions on advanced technologies by the United States, the European Union, and many other countries.

The most advanced technologies were tightly controlled by those nations and strictly prohibited from leaking out.

As a result, many devices couldn't be purchased in Russia no matter how wealthy someone was.

Medical technology was one example. Russia lagged far behind Western countries in that field.

Because of this, many wealthy Russians were willing to spend enormous amounts of money just to seek treatment at top hospitals in Western countries.

The fact that Matthew could obtain these devices through his own channels and even transport them into Moscow completely exceeded Ivan's imagination, both in terms of capability and wealth.

He couldn't figure out Matthew's true identity at all.

The more mysterious Matthew seemed, the more awe Ivan felt toward him.

Fortunately, the results were good. His father's condition was steadily improving.

Still, Ivan found it strange that Matthew seemed to appear and disappear unpredictably.

Sometimes he would vanish without a trace, only to suddenly reappear again later.

But in the end, Ivan couldn't be bothered worrying about it.

With no shortage of money or resources, he now had a laboratory entirely for himself.

There were even dedicated personnel handling communications with him. Any materials he requested would quickly be delivered directly to the lab for use.

It felt incredible.

Compared to the old days, when he had to scrape together resources and rack his brain searching everywhere for materials, this life felt like heaven.

As for Matthew? He was currently inside the Mirror Dimension.

Boom!!

A brilliant orange beam wrapped in crackling lightning shot across the sky like a laser and slammed into a mountain ahead.

The terrifying power instantly blasted a massive hole straight through the mountain.

The edges of the opening were covered in molten rock, charred scorch marks, and signs of extreme heat from the penetration.

Several hundred meters away, Matthew floated calmly in midair as he looked at the attack he had casually unleashed.

A satisfied smile appeared on his face.

After only a few short days of studying and understanding electromagnetic theory, he had immediately applied it to the Rumble-Rumble Fruit and successfully developed the ability of an electromagnetic railgun.

The concept itself originated from real-world theories.

Norwegian physicist Kristian Birkeland first proposed the idea, and in 1920 the French inventor Fauchon-Villeplee proposed the electromagnetic railgun design that laid the foundation for modern railgun technology.

But even now, that technology had never truly been realized or widely applied.

The issue wasn't just theoretical limitations.

Materials were also a major problem.

Railguns didn't rely on gunpowder. They relied on enormous instantaneous electrical currents to accelerate projectiles weighing several kilograms to speeds exceeding two thousand meters per second.

That required peak power outputs reaching tens or even hundreds of megawatts in an instant.

Energy supply itself was a problem.

Then there were issues with materials. Railgun barrels and structural materials simply couldn't withstand the stress. Aerodynamics, overheating, guidance systems, and material bottlenecks all remained major obstacles.

Even if one were successfully built, both its durability and sustained combat capability would still be huge problems.

After investing massive amounts of funding into research, many projects ultimately reached the same conclusion—

Traditional artillery and missiles were simply more practical.

But Matthew had none of those issues.

The Rumble-Rumble Fruit itself turned him into an enormous energy source capable of outputting hundreds of millions or even billions of volts at will.

He didn't need external power sources or massive energy storage systems.

His own body directly functioned as a pulse energy source. With a simple raise of his hand, the energy was already there, completely bypassing the engineering limitations of power supply systems.

At the same time, by relying on electromagnetic field confinement and electromagnetic linear acceleration, there was no need for physical metal rails. There was no contact friction, no rail erosion, and no electrical arc damage to the barrel—resulting in virtually zero-loss firing.

Electromagnetic force wrapped around the projectile, forming a plasma insulation layer.

It completely bypassed every real-world limitation at a fundamental level, as if he possessed a full set of built-in physics "cheats."

His benchmark was none other than Mikoto Misaka—the protagonist of A Certain Scientific Railgun.

And in the end, Matthew succeeded.

Moreover, the process was remarkably natural.

As his understanding of the electromagnetic field deepened, he also began developing preliminary applications of electromagnetic force itself.

Metal manipulation, electromagnetic attraction, magnetic field distortion, and more.

As for electromagnetic waves, his development progressed even faster. Combined with Observation Haki, using them became almost instinctive.

It caused the range of his Observation Haki to explode to over a hundred kilometers almost instantly, and that range was still rapidly increasing.

After mastering electromagnetic waves, modern firearms and weapons were essentially useless against him.

As long as he was willing and the distance was sufficient, he could launch electromagnetic interference from extremely long range and completely paralyze military radar systems, satellite navigation, wireless remote commands, infrared radar data links, and more.

Even after missiles were launched, he could remotely release powerful electromagnetic pulses capable of frying their internal chips and circuit boards, instantly rendering them useless.

At this point, with just a little more effort, he might even surpass Magneto himself.

Though the old man was even more outrageous.

Even from his name alone, it was obvious—Magneto's mastery over magnetic fields had reached an absurd level. His abilities went far beyond simple metal manipulation.

He was unquestionably one of Earth's top-tier powerhouses.

The reason he could stir up chaos anywhere he pleased and still operate freely wasn't just due to politics or external constraints.

He himself was basically a walking nuclear warhead. If he truly went all out, no country could take it lightly.

From a purely practical standpoint, the Rumble-Rumble Fruit actually surpassed the Glint-Glint Fruit.

Of course, the latter's potential for further development was by no means limited to that.

As Matthew's life level continued to evolve and his brain's computational power kept increasing, a deeper fusion and development between the Glint-Glint Fruit and the Rumble-Rumble Fruit could very well produce even more unexpected results.

At the current stage, however, the Rumble-Rumble Fruit had greater development potential mainly because of its broader practicality and lower difficulty of development compared to the Glint-Glint Fruit.

In truth, the Glint-Glint Fruit and the Rumble-Rumble Fruit shared a fairly overlapping direction of development.

Electromagnetic waves.

Light waves themselves were a type of electromagnetic wave with specific frequencies.

Under light's wave-particle duality, it normally manifested as electromagnetic waves, but under certain photoelectric effects it displayed particle characteristics, at which point it was referred to as photons.

That meant it could also interfere with electromagnetic equipment.

It just wasn't as direct or powerful as the Rumble-Rumble Fruit.

One thing Matthew could confirm was that the lightning of the Rumble-Rumble Fruit and the light of the Glint-Glint Fruit were fundamentally connected, and the potential for combined development was enormous.

Superheated electro-optical plasma far exceeding ordinary lightning or lasers alone.

Using electric and magnetic fields to restrain light paths and lock light within electromagnetic channels generated by lightning, creating a super directional-energy laser complete with built-in electromagnetic rails.

Electromagnetic light-pressure shockwaves.

Full-spectrum electromagnetic and optical dual interference.

Electro-optical invisibility and light-path distortion.

And even arbitrary directional teleportation along electromagnetic light paths by combining lightning conductor propagation with photon trajectory locking.

All of these concepts possessed real potential for successful development.