The next day, i.e., October 21.

Saki, Goose, Vivian and others began a deeper study of the relationship between <> and the >.

Jin, Erza, Laokun, Reiko, and others examined the <>.

"Hey, Brother Jin, about the illusionary wards..."

Erza suddenly interrupted, "I've been thinking about it since yesterday.

"Is that the magic technique to make something appear to be there where it is not?"

"Yes. Is that what ............ is about?　Oh, I see!"

Jin clapped his hands together, realizing what Erza meant.

"Now I see, Jin brother, that's great."

"Kuhu, it's called 'heart to heart', isn't it?"

Saki, who was supposed to be discussing the relationship between and , replied in a mixed tone.

Erza's cheeks flushed a little at that, but it seemed to be invalid to Jin, who was in the mode of making things.

In short, Jin thinks that the <> used by <> and the others is a device that allows them to see distant images by using magic power to build something like a <> at a distant location.

As a first step to approach this technology, Jin had been thinking about various <> type technologies, but he had reached a dead end.

But then he realized that he had to go to a faraway place.

"It is illusionary magic that draws an illusion of a distant place using free magic element (ether) waves as a carrier wave.

"Hmm."

The image is somewhat similar to that of a laser hologram.

"If you write a magic circle or a magic formula (Magi Formula) instead of this illusion, you can create ......."

"Yes, yes, I can see that it looks something like that."

Saki is impressed, although she doesn't understand.

"Okay, let's give it a try."

Saki, Goose, Vivian, and the others stayed in the cafeteria to continue the study, while Jin and Erza moved to the workshop.

Jin and Elsa moved to the workshop.

"The scope of the experiment should be very narrow. It's just an experiment.

Erza helped a little, and the prototype was completed in about 30 minutes.

"This should have the effect of emitting a ball of light at a distance of 20 meters.

"Even if there is a wall in between?"

Jin nodded at Elsa's question.

"Of course. The free etheric wave won't be affected even by planets. Let's give it a try."

Jin points the prototype out of the lab and activates it.

Erza ran to the window of the workshop and looked out.

"Jin, it works. It glows.

"Yes."

That's your father.

"Now, let's see if we can develop it from here. We need to increase the distance, and we need to be able to use more complex magic formulas and magic circles.

"Brother Jin, can I try the one to increase the distance?"

Jin thought for a moment and nodded.

Then, please do it. It will probably come down to the convergence of the free elemental waves, so you might want to have a mini craftsman (Smith) help you with that.

"Hmm, okay. Thanks for the hint.

Jin then decides to try a magic that requires a more complicated formula than the <.

"Well, <> doesn't change the difficulty much. ......"

Jin thinks of a magic that is easy to confirm the success.

And.

"......<>."

That is the purpose.

Jin <<> the magic crystal (magic crystal) that is the source of the illusionary wards.

"This is also very detailed ...... prototype is fine, but let's have a mini craftsman (Smith)...... or even a millimeter craftsman (Smith) do the real work."

Millimeter craftsman (Smith) dedicated to microfabrication. He is a super-small craftsman (smith) of 5 mm in height.

On the other hand, Elsa was also doing various things to extend the effective distance.

She seems to be able to reach up to 10 km without any problem, but her performance becomes doubtful from about 20 km.

The <> checks the <>, but it is sometimes activated and sometimes not.

And one more thing, the place of activation is unstable.

A slight tremor at hand can be a tremendous tremor at a distance of 20 kilometers.

So first of all, Erza prepared a solid base and set the magic tool on it.

This eliminated most of the oscillations, but they were still on and off.

"After all, convergence ......"

"What do you think, Erza?"

As Erza was pondering, Jin came in.

"Are you done with that one?"

"Yes, I'm done with that one, and now I'm going to ask Millimeter Craftsman (Smith) to do the work."

"Millimeter Craftsman (Smith) ......"

Elsa gazed at him, wondering how precise the machining was.

She realizes that in order to connect the tremendous distances, it is necessary to aim for a zero error rate.

"The stability of the activation position can be solved by fixing the magic tool. But the activation is ......."

"Ah, so it's a convergence problem after all."

"Yes."

Then ......

It is a part of the magecrystal that serves as a to project illusions.

It is essential to form its physical shape as precisely as possible, Jin said.

"Indeed, I think so.

"So, first of all, let's make sure the crystal is free of defects. ......<>"

"That's what I'm talking about. I was going to ask the mini-craftsman (Smith) to do the geometry, but I hadn't thought of the crystal structure."

"No, I'm an engineer.

Jin laughed, "I have experience and intuition when it comes to making things, but I'm no match for Erza when it comes to ideas.

"Thank you. I'm flattered."

"No, I'm not flattered. ......"

Jin thought he was genuinely helped by Erza's ability to come up with her own original ideas.

"And anyway, let's try this one."

A little embarrassed, Jin looked at the magic tool in front of Erza.

"The actual machine is adamantite ...... or maybe even hyper adamantite."

"What?"

You're going to go that far?　Jin continued to Erza who seemed to want to say.

"Oh. It's an engineer's dream to have a perfect . And I think that would be a pretty good idea.

The slightest distortion or deformation is a non-negligible error hundreds or thousands of kilometers away.

Elsa thought she knew this in theory, but when Hitoshi told her, she realized it all over again.

A telescope with a high magnification is like a blur when hand-held.

"Fix the telescope firmly and with high accuracy.

And so Prototype #2 was completed.

"Let's try it. Check it, please, Mr. President."

Let's start with 20 kg.

Then, 30 kilometers.

It was OK, too.

And it is confirmed that there is no problem up to 100 kg.

Meanwhile, Jin's millimeter craftsman (Smith) informed us that the machining was finished.

"Okay, let's give it a try."

Jin activated his magic tool.