Simulation: Starting from Under One Person

All sorts of whimsical ideas appeared and disappeared in my mind...

About half an hour later, in the exquisitely decorated room, Fang Rui lay on a plain-colored quilt, reaching out his right hand to stroke the tatami mat outside the quilt, feeling its rough, uneven texture...

Hmm, it feels quite comfortable.

Meanwhile, a few trivial matters surfaced in my mind. Decisions on some things were quickly made, while others remained undecided, and drowsiness gradually increased during this time…

The next day, Fang Rui slowly opened his eyes. The hazy sleepiness gradually dissipated, and his blurred vision gradually cleared. He stared at the unfamiliar ceiling for a while, and then lifted the quilt.

Get up, wash up, eat...

After discussing some matters with Kagaya Ubuyashiki, they set off back to Mount Sagiri, together with Giyu Tomioka...

At Mount Sagiri, almost a day has passed since the two masked men began their special training of Tanjiro Kamado, and Tanjiro... has made almost no progress.

Making subtle changes to the breathing technique isn't easy, after all, Tanjiro has known the breathing technique for quite some time and it's become a habit...

It's not something that can be easily corrected.

As for swordsmanship, there has been no progress, and as for physique... there has been no change at all.

What changes can occur in a single day?

The only change was that the number of people living here suddenly increased by several dozen. Urokodaki Sakonji had prepared a little less food, and he was thinking about cultivating arable land and going to the town to buy food.

"Cultivating fertile land..."

Fang Rui rubbed his cheek, agreeing with Urokodaki Sakonji's idea, and then said, "Later I will give you some special vegetable and fruit seeds. Remember to plant them. Eating those vegetables and fruits regularly will be good for your health."

"it is good."

Hearing these words from the all-powerful Fang Rui, Urokodaki Sakonji believed them wholeheartedly and agreed without the slightest hesitation.

With one issue resolved, another arose: "If I wanted to build a weapons manufacturing workshop, where do you think would be a suitable location in the Misty Mountains?"

“There is a stream in the Sagiri Mountains. If you want to build a workshop, you can choose to build it near the stream,” Urokodaki Sakonji replied.

"Is it far from here?" Fang Rui did not make a decision immediately.

“It’s not far, just a minute or two away,” Urokodaki Sakonji explained. “We get our daily water from that stream.”

Fang Rui nodded thoughtfully, thinking: Since it's the source of drinking water, then the workshop should be built in a slightly off-center location! To prevent water pollution, anyway…

For someone like me who possesses magical powers, creating pure water... is very simple.

Therefore, the location of the forging workshop was chosen next to the wide, flat open space where Tanjiro practiced his swordsmanship daily.

As for why this location was chosen, it was naturally for reasons such as making it convenient to test the knife.

Having made the decision, Fang Rui put it into action.

With hands clasped together, the earth trembled and the trees twisted, and an ordinary forging workshop appeared in the forest at an incredible speed.

Then, a clone appeared beside Fang Rui and stared at the main body for a moment.

"You will stay here from now on. I will come back every now and then to collect research results and ores and other items."

As a mere tool, the clone had no objection and nodded slightly.

After that, Fang Rui left the Demon Slayer world and set off for another world.

That's right, he didn't stay in the world of one person because the "company's" preparations were not yet complete, and there were not enough materials to create the floating island.

Therefore, he decided to continue his travels and look for materials along the way.

………………

The Moon World is a world of a relatively high level, inhabited by legendary fantasy species, gods, and all sorts of wondrous and magical creatures, as well as modern magic full of contemporary flair...

All kinds of rare materials are also readily available.

Overall, it's a world perfectly suited for "stocking up".

The only problem is that the "warehouse" has two guards, which could potentially cause issues.

but……

Based on past experience, the items he collected were not taken out of his world, and the items appearing in the simulation store were 1:1 replicas.

'There shouldn't be any problem.'

With this thought in mind, Fang Rui looked around, gathering information to confirm his location.

The Moon World is quite complex. It is not a single world, but rather a collection of numerous parallel worlds. Even the Gem Elder, who can travel between parallel worlds, would find it difficult to give an accurate number of these parallel worlds.

Therefore, the little intelligence Fang Rui possessed could be described in one word: insignificant.

Having chosen a direction, Fang Rui moved straight ahead.

After a while, we left the forest, and the scenery in our field of vision changed accordingly.

A city is divided in two by a river; on one side is the old city full of the spirit of the times, and on the other side is a thriving new capital moving towards a new era.

"...Is this Fuyuki City?"

Fang Rui's tone wasn't particularly certain. After thinking for a moment, he stepped forward, his destination being "Fuyuki City".

After some investigation, Fang Rui confirmed that this place was indeed the famous Fuyuki City, and determined that the timeframe was before the Fourth Holy Grail War. A more specific timeframe would require further investigation.

"I'm somewhat interested in the Holy Grail, but I'm even more interested in what's inside it! All the evil of this world..."

"How could something that represents a certain aspect of the world be of low quality?!"

"I really want to do this research! If I could make some progress, it would definitely help me advance further, but..."

"It's very dangerous!"

"It's easily corrupted by malice~ After all, it's formed from the collective malice of the entire world, we need to think of a way to deal with it..."

Muttering to himself, Fang Rui headed towards Mount Enzang. The Holy Grail was located in a hollow within Mount Enzang; more precisely, the entrance to the area where the Holy Grail was located was inside the hollow within the mountain…

Fang Rui already has a plan to limit all the evil in this world, but before putting it into practice, the preparatory work must be done.

In short, first gather the relevant intelligence, and then use the "star count" to make calculations to see if your plan can succeed.

Inside the cave, Fang Rui's vision broke through layers of obstacles, reaching the area where the Holy Grail was located. The aura of magic was quite abundant. After carefully analyzing the magic for a while, he discovered that it could be converted and absorbed...

The reason for this may be that many energies are similar in nature.

Then, their gaze turned to the Holy Grail...

Its pristine appearance belies a deep-seated malice.

It's quite similar to the legendary Holy Grail; it seems only natural that a cup that once held the blood of Jesus would be cursed.

"........."

The moment his gaze fell upon the Holy Grail, countless pieces of information flooded into Fang Rui's mind. Although much of the information was useful, the malice was far more intense, enough to make him ignore the rest.

"How noisy!"

The spell was cast, and the mental defense barrier was erected.

The malice that threatened his mind was blocked outside the defensive barrier. Fang Rui carefully examined the Holy Grail, scrutinizing every aspect from its shape and patterns to its material.

An object made entirely of magic, which appears to be metallic but is actually non-metallic... a fantasy material made of magic.

In fact, the Holy Grail is also known as the "wishing machine," and it seems reasonable to use it to create special metals that only exist in fantasy.

That being the case...

"...We need to think carefully about how to purify the Holy Grail!"

Fang Rui withdrew his gaze and, in the dimly lit cave, turned around thoughtfully, saying, "The simplest way should be to transfer all the evil of this world from one container to another. The only problem is..."

"Then how to transfer all the evil of this world out, after all, someone who bears all the evil of this world is not the type to cooperate!"

Leaving the cave, the view suddenly brightened, and Fang Rui's gaze fell upon the clear blue sky.

"Speaking of which, there are quite a few Holy Grails in the Moon World, some with problems and some without."

"Let's use a two-pronged approach! Search for traces of the Jewel Elder; if this doesn't work, try another..."

With that, Fang Rui withdrew his gaze and headed towards the town...

There's still some time before nightfall, so let's gather some intelligence before night falls!

According to his investigation, the time point has been determined to be the start of the Fourth Holy Grail War, and it has been confirmed that the participants in the Holy Grail War have gradually arrived, but there is still one vacancy.

"...Is it Caster?"

Fang Rui wasn't entirely certain about his guess; his memory of the incident was very vague, but...

Apart from the Caster group's Master, the other six Masters are all members of mage families, and their Master qualifications were already determined. In other words, the Caster group's Master is an ordinary person, and has the highest probability of obtaining Master qualifications in the end...

"In other words, there's an additional item to be added to tonight's divination..."

On the other hand, now that he knew the timeline, Fang Rui decided to take care of a few things, such as...

The Matou Mansion is a very famous mansion in Fuyuki City. On the one hand, it is old and owned by a prominent family in Fuyuki City. On the other hand, the mansion has a somewhat gloomy style and is known as the "haunted house" in Fuyuki City.

Fang Rui's eyes gleamed with a faint white light, and he had a clear view of the magical barriers and trigger-based magical traps set up throughout the mansion.

"Oh~ no wonder it's a magic workshop that's been in business for hundreds of years, the danger level is off the charts!"

"Unfortunately, it's of no use to me."

As he spoke, Fang Rui pondered for a moment and then decided which technique to use.

The art of finger manipulation involves pointing at something with your finger to cause it to change.

As Fang Rui pointed and gestured wildly, a series of changes occurred within the Matou residence.

Each blade of grass transformed into a soldier carrying weapons, marching in perfect unison towards the house...

The lush trees twisted and turned, transforming into grotesque monsters with wildly flailing tentacles, causing sanity to plummet.

The ivy on the wall transformed into emerald green snakes, rapidly climbing the wall, their hissing sounds rising and falling like waves.

The transparent glass softened, transforming into translucent wild beasts that burrowed into the mansion.

"You're being rather arrogant!"

Suddenly, the sound of mosquitoes flapping their wings rang out, and a dark swarm of mosquitoes rushed out of the mansion to meet the monsters.

The two sides clashed, with blood and flesh flying everywhere, a scene of extreme brutality.

A magician's most powerful moment is when he is in his own magic workshop.