Jin explained to the members of the that he wanted to develop as a new material.

<.

"I see, I've heard of this lithium, but I've rarely used it.

"Kuhu, it's a metal lighter than water, isn't it?

"Is that so?　I guess there are a lot of uses for it.

Reinhard, Saki, Beena and the others expressed their thoughts.

"However, magnesium and lithium have many drawbacks.

Saki, who is familiar with the physical properties of lithium, explained.

"It's good that they are light, but their high reactivity and low melting point are their disadvantages. Also, as I recall, it reacts with water and ignites.

Well, that's a problem.

"That's why we have to alloy it. I suppose we could mix mithril silver with it and make it ."

Saki, Reinhard, and Jin said.

"First of all, why don't we think about taking it step by step?"

Bina gave her opinion.

"Isn't it too much to ask for the final stage all of a sudden?

These words made Jin and several other members realize that they were in a hurry. They were in a hurry without realizing it.

"Yes, that's right. Let's start with magnesium-lithium-mithril alloys."

"That sounds like a good idea.

* * * * * *

"Also, I have one more thing to report. Some of you may have heard of ......."

Jin explained about the hole in the room of the <>, which was located on the 11th basement floor of the <>.

"What do you think made that hole?"

Jin's question was answered by .

"Jin-dono, that hole might be the ."

"Iron Maul?"

"Mm-hmm. It's a golem for exploring underground resources, a sphere-shaped golem with a diameter of less than one meter.

"Spherical?　Why is it ......?

"It has a digging blade attached to its adamantite exterior, and it digs its way through the earth while rotating with the same power as Jin-dono's Force Field Generator."

"Such a thing is ......."

"Mm. The debris is ejected backwards through grooves in the surface.

I see.

I see." Somehow, Jin had an idea.

"You mean you made the hole with that at ......?"

"Yes. I don't know the purpose.

I don't know what its purpose is, but I heard that it destroys magic brains, so it must be somewhere around there.

That's true.

In response, various opinions were exchanged.

"Is there a possibility that the , who had been an enemy of ......, did it?"

"It could also be that it went out of control. ......"

"Or, after they pulled out of the <>, they decided to destroy the control magic brain as well?"

"......I think it's also possible that he let himself be destroyed."

But none of this is proven, so it's all just my imagination.

And there is nothing we can do even if we know why he did it now.

I am not sure why he did it.

Marikka came back at that time. It had been about 50 minutes since she left.

She said, "I'm back now.

Welcome back, Marikka.

Welcome back.

Jin and his friends took care of Marikka and prepared cold Persica juice for her.

<

"Thank you very much.

Marikka drinks it gratefully. Then she makes a report.

"Well, here is my report. As it turns out, there was no concrete record. However, there were some fragments of information that might be helpful, so I recorded them in the magi crystal and gave it to the old man.

<

"Oh, you work very fast. You're the man, Marikka, thank you. Thank you, Marikka.

"No, no."

Marikka looks happy to be appreciated by Jin.

And 30 seconds soon passes.

"Please."

< in the former Leonard's Kingdom.

I see.

"Yes, that's quite possible."

< nodded that the would act in that way.

The elder explains the next part.

.

The Master shows a map of the Rasheer continent on the large magic screen.

<

"Yes, that seems to be a possibility."

<<< but I would like to have more information.

The old man said that it would still take too much time to scan the ground with a peephole telescope.

He said that it would take several years to several decades to search at this stage, unless by chance.

"Then, we have to ...... see if there are any clues in other ruins."

"Yes, Jin is right.

Goose immediately agreed.

"Then, first of all, the ruins on the continent of Pandor?"

"I see."

The old man had already confirmed such information on the known remains.

"Then, where can I find more information?　Have you checked with at ......?

<> didn't seem to know the details either.

"Well, ...... that's too bad."

"Jin, you could try to see the site in person."

Goose offered his opinion.

"If they built the town underground, there must be some traces of it above ground. Ventilation openings, entrances and exits..."

I see. That's for sure.

How about we start by looking at it from the sky?

"Yes, Goose has a point...... or two or three. ...... But how could Goose, who is not good at heights, come up with such a good idea?"

"Not being good at heights is not the same as not being able to think of them.

"That's one thing."

So we decided to investigate from the sky first.

"If you prefer to take it slow, we can take the Hurricane for a leisurely cruise.

"Great, that sounds good."

"Nah, I agree."

Since it is better to have many eyes to examine, we decided to go with members who are available.