Is this the hierarchy we're looking for?

"It should be.

Jin and his group had finally reached the level where the magical brain that controls this is believed to be located.

Now, let's see what we can find.

The group was now standing in a hall that was smaller than the one they had come from.

"I don't know which way to go!

The hall is a circle with a diameter of about 10 meters. It looks the same no matter which way you go. There is no door.

At that moment, Jin's doppelganger (Jin D) senses a change in atmospheric pressure.

Or more precisely, a .

"Is the air being removed?"

The current atmospheric pressure is about 0.8 bar.

That's a pretty effective ......?

If we're dealing with a human being.

There are no humans in the line, so even if there's a vacuum, it won't bother us.

"Yeah, but we won't be able to talk to them."

Jin D. and Lando and the others can talk to each other through the built-in manacam, but not <>.

Conversation in a vacuum is only possible by making contact and transmitting <> directly.

(If <> had a built-in manacam (manacam), it would be ...... but that would be too much to ask for.)

In the meantime, the atmospheric pressure dropped to 0.2 atmospheres.

But that seemed to be the end of it, and there was no complete vacuum.

"Is it possible to have a conversation?"

"Yes, it seems so.

Their voices are muffled by the low air pressure, but this is not a problem for those with good hearing.

"Not quite a trap ......, but it's a measure to keep out <> or >."

"Yes, that's probably it.

Then we'd better get out of this hall.

I agree. Then we should leave this hall as soon as possible.

Jin D. and had a brief discussion and agreed to leave this hall.

But it is a little too late.

Hmm?　Gas?

A gas flows into the room at once as the air pressure drops. It was hydrogen sulfide.

Not only is it deadly if inhaled by humans. It also corrodes metals.

Hmm, with this gas, ......

worked her magic.

Neutralizing hydrogen sulfide is difficult in reality, but it is possible with magic.

The hydrogen sulfide is decomposed into hydrogen and sulfur, and the sulfur is deposited on the floor as a solid.

"<>"

Jin D. combined the hydrogen with what little oxygen remained in the air <> back into water.

This rendered the hydrogen sulfide harmless.

"That's quite a feat."

Mm. We'd better get out of this hall as soon as possible.

However, in spite of the diligent search by the five Lando's, the exit was still not found.

Jin D concentrates on searching for a way out with the RAND team.

Then, the third attack is unleashed.

The hall is quickly filled with liquid.

Now ...... the water attack?　No, this is ...... acid!

< has various analyzing functions and said <>. In other words, it is <>.

"That's just awful."

The hall's walls, floor and ceiling are coated with adamantite to prevent corrosion by hydrogen sulfide and hydrochloric acid.

The exterior of the land is made of light silver, whose oxide film is not affected by hydrochloric acid.

Jin D can also withstand hydrochloric acid without any problem, but <> has a stainless steel exterior.

Stainless steel is not compatible with chlorine ions.

In other words, it is dangerous to soak it in hydrochloric acid for a long time.

"Uh, I think it's ......."

Jin recalls what little chemical knowledge he has left.

"Hydrochloric acid......Hydrogen chloride HCl is electrolyzed to hydrogen H2 and chlorine Cl2. ...... Rand, all of you <>!"

"Yes, Master."

Lando and the others release lightning magic from their hands.

It is an engineering magic as well as a lightning magic.

A negative charge is generated on the right hand side of Rand and a positive charge on the left hand side.

On the right hand side, hydrogen ions H+ gather and gain charge e- to form hydrogen atom H, which bonds with other hydrogen atoms to form a bubble of hydrogen H2.

On the other hand, on the left hand side, chlorine ions Cl- gather, lose their charge e- and become chlorine atom Cl Cl-, and the chlorine atoms bond with each other to form chlorine Cl2.

Normal electrolysis takes a certain amount of time, but the engineering magic also accelerates the reaction by increasing the speed of the ions, and in a short time, the hydrochloric acid becomes just water.

Thank God, Master Jin!

Your voice will be heard in the water.

I thank . But the surface of his body has lost its luster.

Jin D. then uses sonar to find a cavity on the other side of the wall.

"<>"

No need to risk being in this hall any longer, Jin D. makes a hole in the wall by engineering magic.

The water, which used to be hydrochloric acid, flowed out through the hole.

"I wonder what the management brain of this thinks when he sees this..."

I don't know. <

"Indeed. It is indeed difficult to guess such thoughts.

Eventually all the water drained away.

"There seems to be a drainage system on the other side."

Jin D guessed as he watched the water being sucked into a hole in the corner of the floor that looked like a drain.

Jin-D guessed so, because a vehicle that floats on water should have such a drainage system.

"I guess we'll just have to go for it.

I'll take the lead.

Land11 came forward and JinD seconded the motion.

Land 11, Land 12, Jin D, <>, Land 13, Land 1 4 leave the room in that order.

Land 15 is not in position and is in a ranger position.

They exit the room in the corridor. The group continues on their way.

"I don't know if this is correct. It could be that they are going in the opposite direction.

Yes, that's true. But according to the information I have on the mobile base, it's not completely the other way around.

"Hmm?　Do you understand?"

Unless the invaders have changed everything, I don't see why they would go to such lengths.

leads the way down the passage and turns left.

This should be the right way.

It was about 90 degrees off the path.

walks carefully. Jin D followed behind her, but observed that her movements were somewhat awkward.

"<>, are you not feeling well?

"No, I'm fine. Not yet to the point of malfunctioning.

It seems to have been slightly affected by hydrogen sulfide and hydrochloric acid.

The seams on the exterior are affected. Maybe some corrosion inside as well.

As you know, I have a replacement. Don't worry.

After saying this, <> continues silently down the passageway.