A certain crossover anime's nuclear-powered sword immortal

"This is the last thing I found at the Tohsaka residence; it must have been something your father carried."

Shirou spoke calmly to the girl.

"I'll hand it over to you now."

Upon hearing these words, Rin stared at the gemstone and felt a sharp pain in her heart.

With trembling hands, she reached out and held the gemstone in her palms, examining it carefully and almost reverently touching its smooth surface, as if she could feel the warmth of her father's fingers.

"Father……"

A tear suddenly fell onto the gem in the girl's hand. This was the first time Rin had cried since learning of her father's death.

Shirou looked at the girl who was reminiscing about her father, said nothing more, and turned away.

Just a few steps later, I heard a girl's suppressed sob behind me.

"Can you tell me... your name?"

"...We'll meet again sooner or later, and then you'll know."

After saying those words, Shirou left.

Chapter One: The Third Star Particle Body

[Selecting a world for you...]

The system's voice came again after a few seconds.

[Selection complete, next world is "Godslayer"!]

[Main Quest: Kill the 'Last King'! Quest Reward: One Dimensional Roulette spin!]

Upon hearing about the next world he was to travel to, Shirou immediately searched his mind for all the information about that world.

"Campione" tells the story of a world where people weave all sorts of myths, and these myths in turn create all sorts of gods.

In that world, gods were no longer beings that existed only in legends, but were beings that could manifest in the world through certain methods, existing in a form different from humans.

The god-slayer is the one who kills the 'disobedient gods' of the present world and seizes their power; he is a king, and also a demon king who possesses the power of a god.

Every god-slayer is a being who reigns supreme at the pinnacle of the world; their power is enough to overturn everything.

No contemporary magician would dare to show even the slightest disrespect to the Demon King, for the Demon King and the magician are worlds apart.

The power that a magician might struggle to attain in his entire life, a power that a demon king with divine authority can wield effortlessly.

The terrifying power that the Demon King wields with every gesture is a pinnacle that magicians can never reach, even if they spend their entire lives trying.

Of course, although each Godslayer stands at the pinnacle of the world, there are still differences in strength among them.

Among these people, there are two who are the strongest.

One of them, without a doubt, is Sasha de Jansdar Voban, who possesses ten divine powers and can also be called Marquis Voban.

As the oldest of all the god-killers, Sasha Dejansdar Voban not only possesses the largest number of powers, but also has an extremely high level of proficiency with them.

Furthermore, he possesses the ability to treat god-slaying as mere entertainment.

The other one, without a doubt, is Luo Hao, the leader of the sect located in Jiangnan.

She is hailed as the pinnacle of martial arts.

Even the Marquis of Voban dared not underestimate him.

The two were arch-enemies who had survived for many years.

"Although this world is still full of dangers for me now, it also contains countless opportunities. If I can seize them, I will be able to obtain divine power!"

The next moment, light gradually appeared in Shirou's eyes.

What comes into view is a city where ancient and modern coexist.

This is Rome —

The capital and largest city of Italy, it is the political, economic and cultural center of the country. With a history of over 2,500 years, it is a world-renowned historical and cultural city, the birthplace of the ancient Roman Empire, and is affectionately known as the "Eternal City" due to its long history.

Located in the mid-western part of the Italian peninsula, on seven hills in the lower Tiber River plain, the city center covers an area of ​​more than 1,200 square kilometers. It is the largest city in Italy in terms of area and population, and one of the most famous tourist destinations in the world.

The Rome here isn't that different from the Type-Moon world where Shirou was before. The biggest difference is probably that every myth and legend here could potentially bring down a god.

At this moment, Shirou was only in a corner of the street.

A constant stream of people walked past him; most of the city's female residents wore retro-style long dresses, except for tourists from other parts of the world.

Shirou himself came from a modern city, and his clothes were not much different from those of ordinary people. Apart from his outstanding appearance, he did not cause any disturbance, except for attracting many glances from women.

Ignoring the stares, Shirou found a bench and sat down, then opened the "Dimensional Roulette" panel.

With a thought, a faintly glowing light screen appeared in his vision, displaying entries for abilities, lineages, items, and the like.

The Enma sword from Devil May Cry 5, the World Beyond Heaven from JoJo's Bizarre Adventure, the Crimson Supernova Dragon from Yu-Gi-Oh!, the Zenki Sword from Terraria, the Izanagi Okami from Persona 5, the Third Star Particle from Problem Children Are Coming from Another World, and the Ryujin Jakka from Bleach...

There are a few others, but none are as appealing as the ones mentioned above.

Shirou's eyes lit up as he looked at the dazzling array of powers and tools.

"let's start."

Looking at the roulette wheel on the panel in front of him, Shirou thought to himself.

With those words, the roulette wheel began to spin.

Shirou held his breath the entire time, staring intently at the spinning wheel and the pointer that would determine what power he would gain.

"stop!"

The moment Shirou gave the command in his mind, the pointer's speed suddenly dropped, slowly coming to rest at the edge of an entry.

That is—the 'Third Star Particle Body'!

In the anime "Problem Children Are Coming from Another World, Aren't They?", the protagonist, Izayoi Sakamaki (Saigo), possesses a perpetual motion machine in his blood known as the "Third Star Particle (3S, nano machine unit)".

The "Third Star Particle" is known as humanity's last secret. It can create energy out of thin air from information about the surrounding environment, which is the completed third permanent mechanism.

After the first law of thermodynamics was established, people realized that such 'stellar particles' could not be created out of thin air.

Therefore, some people proposed designing a device that absorbs thermal energy from the ocean, atmosphere, and even the universe, and uses this thermal energy as the source to drive the perpetual motion machine to rotate and output. This is the second type of perpetual motion machine.

However, after the German Rudolf Clausius and the British Kelvin studied the Carnot cycle and the first law of thermodynamics, they proposed the second law of thermodynamics.

The advent of this law definitively sealed the fate of perpetual motion machines of the second kind.

After that, the theory was constantly created and then refuted, but none of them could prove the principle of the existence of 'stellar particles'.

Finally, Izayoi Sakamaki's parents completed the perpetual motion machine using the 'Star Particle Body' and named it the 'Third Star Particle Body' based on the 'Third Permanent Machine'!

call out----!

A beautiful and dazzling light, like that of a star, slowly flowed around Shirou's body before merging into it.

The 'Third Star Particle Body' began to flow in Shirou's blood, bringing him endless vitality.

Right now, he is filled with a surge of power he has never felt before.

His strength is enough to shatter mountains, his speed exceeds the speed of sound, and he can throw objects at the third cosmic velocity.

An endless stream of power and incredible magic surged through every corner of Shirou's body.

The original magic circuit was destroyed by that powerful force at this moment, and then immediately reconstructed.

If his former magical power was like a stream, then his current magical power is like an ocean.

The properties panel provides a more detailed view.

[Name: Orihara Shirou]

【Sex: Male】

【Height: 187cm】

[Race: Human]

[Bloodline: 'Third Star Particle Body']

Special Ability: Unlimited Blade Works

【肉体强度：240→1223（10）神经反射：361→1040（10）生命力：334→1377（10）精神力：137→846（10）】

At this moment, Shirou's various stats have greatly improved, and his apparent strength has reached the five-digit (surface level) level.

His physique far surpasses that of the god-slayers of this world, and is no less impressive than that of the disobedient gods.

Therefore, he also has greater room for growth and potential.

This energy that comes from nothing, let alone so-called grand magic or magic, could even change the entire human civilization, providing it for billions of people worldwide, and enabling them to journey together into the vast universe.

It can be said that what limits Shirou now is the size of the magic valve and the flow rate of its use, rather than the "capacity" of magic.

For Shirou now, the most important thing is to fight against the heretical gods of this world, acquire those powers, increase his fighting methods, and at the same time develop ways to use this vast and inexhaustible energy in a greater way.

After all, once he fulfills his promise to Saber, he will definitely go to more worlds in the future, and the strength of a single power is not feasible in the world of anime with multiple power systems.

Shirou raised his right hand, clenched it, and then released it, his brown eyes seemingly burning with flames.

"This world has become my brand new stage."

With that thought in mind, Shirou strode into the streets of Rome.

"It's time to start searching for the existence of the 'disobedient gods'."

Combat and acquiring 'power' are the fastest ways to increase strength, and this world has no shortage of these two things.

As they were walking, Shirou suddenly frowned.

When I started the "Dimensional Roulette" here, the number of pedestrians around me had become increasingly scarce, and there were no pedestrians at all in the area near the fence in front of me.

"Is this... a magic trick called 'Dispelling Bystanders'?"

Shirou noticed something was wrong and immediately started walking towards that direction.

The most iconic building in Rome, the symbol of the Eternal City, the Colosseum, was at the end of the road on the right, but Shirou had no intention of going to see it. Instead, he went straight to the pedestrians standing in front of the railing, looking down at the road below.

Golden sunlight streamed down, dappling the ground and revealing the ochre or orange rooftops, which quietly displayed their rustic beauty.

The square and fountain appeared even more serene under the warm, gentle sunlight. The streets below were bustling with pedestrians, but no one approached the upper part of the steps.

Every passerby seemed to be influenced by some force, walking in another direction. This is the power of the magic trick "Dispelling Idlers".