The infinite sword system has been mastered, and you say this is the dragon clan?

Chapter 304 We are all living hard
The imaginary submarine Shadow Border appears in the second part of FGO. It is the base vehicle carrying the members of New Chaldea. In the original work, it is a vehicle that Leonardo da Vinci himself spent a lot of time secretly making. Its appearance is similar to a large armored vehicle.

Shadow Border can use the magic gift set - "Imaginary Compass · Plane Moon" as a compass, allowing the entire vehicle and the human body to dive into the imaginary space (a meaningless space without a time axis), and then move forward along the route indicated by the compass, floating back to the real world (the real world) with different time and space coordinates, thereby realizing time and space movement.

In the original game, the "Imaginary Submersible" technology was actually an alternative to "Spirit Transfer." It wasn't used in the first FGO storyline simply because it failed in the bidding process.

The main reason for becoming a backup option is that using imaginary number submarine navigation to move through time and space is a more risky behavior than lepton transfer.

The biggest problem with imaginary diving is that without an anchor point in the real world, it is impossible to successfully surface and reach the space-time coordinates of the destination.

Then you can only sit in prison for the rest of your life in the dark and dayless imaginary space. When your supplies are used up, you will die in the imaginary space and never come back.

This situation is similar to Tiamat, who created the planetary ecosystem of the Type-Moon world. After being exiled to the imaginary space, she could not return, which was equivalent to encountering an unsolvable seal.

However, the transfer of spirit particles requires special "spirit particle transfer qualifications", unlike the imaginary submarine which does not require qualifications.

The first step in the process is to place the transfer object into a special basket, and then use a supercomputer and accelerator to decompose the human body into leptons.

At this point, the basket is isolated from external observation, becoming a "box that is both alive and dead," and the person inside the basket is in a superposition state of the two.

The second step is to confirm the status of the destination of the soul particle transfer through the human history map Chaldeas, and deliver the soul particles that the human body is decomposed into to the destination.

The third step is to observe the inside of the basket, and the result is "nothing", while the object of the lepton transfer is successfully materialized at the destination.

From this, it is obvious that lepton transfer utilizes a sophisticated theory similar to the "observer effect".

As long as there is no problem with the "Observer" (that is, equipment such as Chaldeas), and there is no accident with the basket during the transfer process (such as an explosion caused by a bomb buried by Leif underneath).

The security risks are basically very small, and there is no need to worry about situations like virtual diving.

Therefore, if virtual diving can really be carried out safely, the issue of the "anchor point" cannot be avoided.

BB stretched out a finger and swiped it nimbly across the air, transforming it into the shape of an island.

"If we're talking about an anchor point in real space, wouldn't Avalon be enough? Although it was once Odin's lair, it's a very ancient existence, and now it belongs to us. As long as we use Avalon's material as an anchor point, we can ascend to Avalon in any era."

"But senior, do you really think that imaginary space exists?"

The name of the imaginary space comes from the "imaginary number" in mathematics. It is just an auxiliary number relative to the "real number". Everything in the real space is described by real numbers.

The solutions to quantum mechanics' equations allow for the existence of imaginary numbers, resulting in imaginary solutions that are mathematically meaningful but physically meaningless. All our imaginations of imaginary space stem from this. However, in this world, there is no evidence that imaginary space exists...

Since they are all imaginary numbers, how can they be easily observed by people in the real world?

"It's very likely... No, it definitely exists."

Emiya's answer was quite confident. He wasn't just making random guesses. "If you consider imaginary space as 'an alternate dimension different from real space,' what can you think of from this perspective?"

"A world so different from reality? Nibelungen?"

"That's right. The physical laws of the Nibelungen are obviously different from those of the real world. They even align very well with the imaginary space of the (Type-Moon World)—"

"They don't seem to have any flow of time."

For example, the flowers and trees on Avalon are always in full bloom year-round, with no signs of withering or dying, as if time has forgotten this Apple Isle. The Nibelungen Night Food Field in Tokyo is also filled with an ancient atmosphere, as if a scene from the Edo period has been completely preserved.

"And how was Nibelungen able to establish such a different dimension where time doesn't accumulate? There must be a foundation for establishing such a dimension with completely different physical laws."

BB suddenly took over Emiya's words and said, "In other words, the Nibelungen—is built on the foundation of imaginary space! Imaginary space does exist, but it is essentially an alternate dimension without any Nibelungen. It's a meaningless space with nothing in it!"

"Well, there is one more point to support this."

Emiya stacked the steak plates he had finished eating and said, "Remember Helvey and Orluen? They have the ability to infiltrate the Shadow World. They once described to me what it felt like to infiltrate the Shadow World. I suspect that the essence of their ability is to infiltrate the Imaginary Realm."

"Oh, so Senior's preparations for the 'Imaginary Submersible' are complete! Research materials, conceptual design, and that Da Vinci as the engineer... after all the calculations, it seems like the hard workers are basically ready to go at any time!"

Seeing Emiya clear the dishes off the table, BB playfully sat down at Emiya's table. When she lifted her long legs slightly, her skirt lifted up. She said arrogantly, "Then congratulations in advance on another great achievement, Senior!"

"...It's daytime now, I don't have time to play with you." Emiya pushed away BB, who was taking up a large area of ​​the desk.

"Ouch!" BB was caught off guard and fell backwards. After leaving the table, he turned around in the air, made a face at Emiya, and then angrily got into his phone and disappeared.

At this moment, there was a knock on the door.

"Who?"

"Lu, Lu Mingfei!" A stumbling and somewhat nervous voice sounded.

"Huh?" Emiya didn't pay much attention to this e-sports player who entered the inspection team through the "backdoor", so it was a bit unexpected that Lu Mingfei would take the initiative to come up to him.

"Come in, what can I do for you?"

The latter came in with a serious expression and closed the door, "—Leader, I found something wrong with Chaldea!"

Emiya: “…” Of course I know there’s a problem, and it’s a big problem!

"They have done human experiments before!" Lu Mingfei's voice was so low that it seemed to be squeezed out from between his teeth.

"Oh?" Emiya finally showed a hint of surprise. "Let's sit down over there and discuss this in detail." ————

The next day, Da Vinci was humming some kind of baroque polyphonic music while tending to the decorations in the newly decorated workshop. Still unaware of Chaldea's dark history, she was still excited about the human rights protection plan implemented through the transfer of spirit particles.

The core of the plan mentioned by Director Pompeii is undoubtedly the simulated earth environment model called Chaldeas. This great invention completed in modern times has also aroused her great curiosity.

So, in exchange, Da Vinci agreed to stay temporarily as a Servant to help Chaldea improve the Heroic Spirit Summoning system with a more stable spiritual base. This problem would be a difficult task for others, but for her, a genius, it was a piece of cake.

"Ms. Da Vinci... Here are the documents you need, as well as a list of renovation materials. Please confirm."

Suddenly, a pink-haired girl wearing glasses named Kyrielight ran over. This girl was also a member of Group A, but Da Vinci always felt that her temperament was completely different from that of ordinary people, with a pure and flawless feeling that she had never seen the world before.

"Thank you for your hard work, Kyrielight," Da Vinci said, examining the girl's pink hair with curiosity. "Excuse me, but is your hair naturally like this... I mean, the color? Or is it dyed?"

"Hair color..." Kyrielight subconsciously twisted the hair next to his cheek.

"It's definitely not natural. It was originally dark red, but something happened that changed it to this color... When you say 'hair dyeing,' you mean the process of temporarily coloring your hair with hair dye. That requires a professional hairdresser, right?"

"...Yes, it seems that Kyrielight has some unspoken reasons. Well, never mind, thank you for coming here. As for the renovation workers, I don't need them for now. As a Caster-class Servant, you are also very good at the basic 'Field Creation' skill."

Leonardo da Vinci said goodbye to the other party with a smile, while secretly thinking about the strangeness of Kirilet in his heart.

This girl's description of something as everyday as hair dyeing was surprisingly formal and academic, as if she'd never experienced it before and only knew it from informational materials... Did she lack a lot of normal life experience? She wasn't a summoned Heroic Spirit, her modern common sense instilled in her.

However, this hasty thinking was soon forced to stop.

The unexpected arrival made her grip the large wand tighter.

"Entering someone else's workshop without permission is considered a serious, hostile act of provocation, you know?"

Da Vinci raised the tip of his staff and pointed it at two figures that suddenly appeared from the corner.

The girls in skirts and long boots bowed lightly to show that they had no hostility.

"Excuse me, I'm Helver, and this is my sister, Orlune. We're here on the orders of Lord Emiya to deliver a groundbreaking engineering design to Ms. Da Vinci. Lord Emiya said you'd be interested."

After saying that, Orluen, who was standing next to Helville, stepped forward and placed the folded blueprints of the Imaginary Submarine on the table next to Leonardo da Vinci.

Da Vinci didn't reach for it immediately. He said calmly, "Does it have to be this intrusive? If you encounter a magician with a bad temper, you'll be attacked immediately."

"I'm sorry, Lord Emiya, if I openly contact you, it will cause an overreaction from the rest of Chaldea. In order to avoid attracting attention and unknown changes, this method is safer."

"You trust me? You actually openly reveal such a hidden stealth ability to me, a Heroic Spirit who has only been in Chaldea for a short time?"

Helweier answered flawlessly, "Emiya-sama said you would be interested in the blueprints."

Da Vinci glanced at the blueprint, her curiosity piqued. However, seeing her probing methods were fruitless, she resorted to a more direct method to elicit information. "Okay, so you're planning to collude with me, right? Who are you trying to protect against?"

Helvil raised her head and looked directly into the Servant's eyes, "Master Emiya said there was a problem with the Spirit Transfer."

"Are you suspecting the director?!" There was a flash of surprise in Da Vinci's eyes. She had just entered Chaldea not long ago and did not trust the people here much, but it was not to the point that she inexplicably suspected Pompeii of using the spirit particle transfer plan to cause trouble.

"Yes, it's okay if you don't believe me, but Lord Emiya said that the first experiment with the transfer of spirit particles is bound to go wrong, so we must take precautions in advance. The drawings Lord Emiya gave you are one of those precautions."

"Once the construction is completed, even if Chaldea falls and the world is destroyed, we will be able to turn the tide and reclaim the world that belongs to us humans."

Hearing this, Da Vinci couldn't help but look at the drawing again. It sounded so interesting and amazing!

The inventor's soul in her heart was burning, and she could hardly suppress the urge to start studying the contents of the blueprint and verify her ideas on the spot...but, she had to remain calm and elegant in front of outsiders.

"Well, if the blueprint is indeed so exquisite, I can trust your sincerity," Da Vinci said with a smile. "But if your inspection team wants to suspect the director of something wrong, at least you should present the evidence you've gathered from your investigation, right?"

Helver sensed that Da Vinci was indeed about to fall for his trick, so she bowed and stepped back. "You'll know soon. Next time, at the right time, Lord Emiya will reveal to you the darkness of Director Pompeii and Chaldea..."

The two retreated to a corner, squatted down, and disappeared into the shadows.

After looking around and making sure that there was indeed no one around, Leonardo da Vinci reached out and grabbed the blueprint with lightning speed.

"Shadow Border...? What do you mean, the border of shadows (literally)?"

Da Vinci continued to read, her eyes gradually brightening. She did not miss any line of words or standard instructions for components. The exquisite engineering design and simple integrated system were no less magnificent and stunning world-famous painting in her eyes.

This was natural. BB's design drawings combined the alchemical ideas of the little devil Lu Mingze and Norton, advocating the use of advanced levitic technology to transform decay into magic. The futuristic, sci-fi atmosphere that suddenly came to him made Da Vinci scratch his head and want to take action...

But not long after, she encountered a huge obstacle that stumped her.

"...The imaginary submarine Shadow Border designed for this project is primarily used for imaginary submersion. It is recommended that a more flexible modular construction be adopted in the initial design, so that defensive or offensive templates can be added later to better cope with various difficulties that may be encountered in the process of saving the human world."

What does it mean? What is imaginary submersible?

Leonardo da Vinci was puzzled because the most critical part of the drawing was incomplete!
There was no explanation about the core function of "Imaginary Submersibility" above. Da Vinci was enjoying it just now, but now she had to stop and think about it. Her mentality was like she was about to reach a climax, but suddenly stopped!
Could it be that the way this imaginary submarine vehicle deals with obstacles is to be like the Hundred Ton King, simply saying "We are all trying our best to survive!" and then driving over the difficulties when they arise?

(End of this chapter)