The sun has set and it is dark outside.

The ceiling of Jin's office, like that of the laboratory, is covered with a luminous material that emits light as long as there is free magic element (ether), or as Jin calls it, >, and it automatically starts emitting light when it gets dark. It was only when he looked out of the window that he realized that the sun had set.

When Licia and Pascoe saw the glowing ceiling, they were in awe. When Jin saw this, he said

(Ah, this ethereal luminescent material (AL) was a common material in the past, but it has been lost. ......)

I thought, "Oh, this ether luminescent material (AL) was a common material in the past, but it has been lost. At the same time, I was thinking that it might be OK to be somewhat proactive in reviving <>.

But for now, the first thing to do is to reactivate the two exclaiming.

"Well, this was given to me by Deus Ex Machina as a gift for the completion of the castle.

Jin quickly blurts out something out of his mouth.

Jin and his friends have finished dinner in the downstairs dining room.

Jin advises Licia and Pascoe that they should get some rest because he wants them to leave early tomorrow. Jin then tells them that he is going to his home workshop in the village of Kaina to prepare medicines and other things.

"......I understand. I have a lot of questions, but what we need to do now is to take care of the disease.

"......Licia is right. I'll do my best to assist her.

The two of them then retired to their bedrooms.

"Well, I have to do what I have to do.

Jin then got on a frame and headed for his workshop. The frame was equipped with a light and was autonomous as a golem, so there was no danger.

"...... Jin brother, welcome home."

Erza greeted me at the house.

"I'm home. ......Erza, did you hear what I said?"

"Yes. Butler A told me.

Since Erza is able to use the healing magic of the Shoro Empire, after the meeting with the old man, I instructed Butler A to explain the outline of the magic to Erza as well.

"How much healing magic did Erza have access to?"

"Up to ......<>."

I wasn't sure from the chanting, so I asked her to put the magic into the Persica juice I kept in the fridge.

"...... into this?"

Erza looked doubtful, but since it was Jin's request, she complied.

"<>"

Then the Persica juice glowed faintly for a moment.

"What was that ......?"

"Well, liquids that contain a large amount of free magic element (ether) can be given magical properties.

Erza seemed to understand this somewhat.

Jin analyzes the Persica juice to which Erza has given magic properties. To his delight, it turns out that Erza's Heilfahren is as good as or better than MediCare, the advanced healing magic cure.

Jin is pleased and tells Elsa: "That's great!

"That's great, Erza!"

Erza's cheeks flushed slightly at the praise and she asked Jin a question.

"...... Is that alchemy?"

"Yes, yes. Do you know it?

"Yes, I do. ......Saki-san liked that kind of thing."

Jin heard a name he had never heard before.

Saki?

Saki Eschenbach. The daughter of an alchemist who lives in my brother Rai's family estate."

"You mean, Thor Eschenbach's daughter?"

Jin was a little surprised to hear the name Eschenbach come out of Elsa's mouth.

"You know him?"

Elsa asked him, tilting her head. Jin explained that he had read the book when he was shown the library in the Shoro Kingdom the other day.

"...... Saki used to play with me when I was little. She taught me a lot of things then."

"I see."

I would like to ask her about the Eschenbach family, but now is not the time.

"Well then, Erza, will you go with me to Horai Island?　I would appreciate it if you could help me make medicine there.

"Yes. I'll be happy to help.

So the two of them jumped to Horai Island through the warp gate in the basement of the workshop.

On the island of Horai, the old man had finished the preparations as previously discussed.

"Okay, then I will make the golem horses as planned. So, my lord, Elsa can use a spell called . That seems to be somewhat more effective. So, please help Elsa to increase the production of the healing medicine, or rather the cure.

Jin leaves the task to the old man and Elsa. Erza goes with Laojin's mobile terminal and Lao Tzu to the laboratory on the second floor of the institute. It is right above the workshop where Jin is.

Jin then started to make a golem horse to carry Licia and Pascoe tomorrow.

The base is the same as Ein's, but with custom tuning. Specifically, it is to <>.

Riding a horse requires the rider to have good balance. This is due to the fact that the rider is swayed up and down, left and right, on the horse's back. The need to balance in order not to be swung off causes fatigue in the abdominal and back muscles.

In addition, the rider must communicate his will to the horse while holding the horse and saddle with his lower body.

The muscles used for these activities are completely different from those used in daily life, and they are very tiring if one is not accustomed to them. And even if you are used to it, running a horse at high speed is still tiring.

Considering the above, it would be better to build an off-road bike, but there is no way that Licia and Pascoe would be able to ride it out of the blue. Also, they would be seen by others.

Therefore, Jin adjusted the gait so that the rider would not feel any ups and downs even when the horse is galloping, and used a shock-absorbing material called goulashvam for the saddle part.

The shape of the saddle is also a little less horse-like, but we decided to give priority to a shape that is more comfortable to sit in.

The horse is also made to be more autonomous, fully understanding the rider's words and capable of giving verbal commands. However, we did not add a vocalization function. This is because it is a little creepy to hear a horse talk.

Instead, the horses can communicate by shaking their heads up and down in the affirmative and left and right in the negative.

"Maybe I shouldn't talk to Licia and the others. ......"

Jin did not want to give unnecessary suspicions because of the high specs.

The series of work was assisted by a craftsman (Smith) golem, so that 10 golem horses were completed in about an hour.

The reason why there were 10 golem horses is that the time and effort required by Jin was almost the same whether there were 2 or 10 golem horses, only that there were more artisan (Smith) golem horses to help him.

Jin took this opportunity to make more golems because he could use them in case he needed them later.

He plans to lend two of them to Licia and Pascoe. He colored them brown so that they would not stand out too much.

"Okay, now the legs are done," he said.

Jin went to the laboratory on the second floor to see what was happening with the medicine.

"......<>"

Just when Jin appeared in the laboratory on the second floor.

The drug base in front of Erza's eyes emitted a blue light and turned into a transparent liquid. At the same time, Erza collapses.

"Erza!"

Jin rushed to her in surprise.

"My old man!　What did you make Erza do?

He was interrupted by the actual Erza, who was saying in a strong tone of reprimanding words.

"...... Sorry, Jin, brother. This is what I wanted, what I wanted, what I did."

Erza explains with a pale face. From her appearance, Jin judged that Erza had probably used up all the mana in her body.

Although Erza has a hypermagic condition, if she runs out of mana, it will appear as a physical disorder.

So Jin gave Erza a drug base to which nothing had been added, and made her drink it slowly.

The free magic element (ether) contained in the drug base is absorbed by the body cell by cell, and is converted into magic element (mana).

The pallid face of Erza is now beginning to regain its animation.

"...... hmmm..."

Erza breathed deeply and Jin said,

"Erza, I appreciate your cooperation, but please don't do something so reckless that you collapse yourself. ......

He rebuked her in a slightly harsh voice.

"......I'm sorry for worrying you. But I also wanted to be of help to my brother Jin.

Patting Erza's apologetic head, Jin thanked her with a <>. Erza looked up at his words, and a happy smile appeared on her slightly stained face.

Seeing that Elsa had calmed down, Jin asked the old man a question.

"So, Mr. Mere Old Man, what is the magic now?"

The old man said in astonishment.

"What!　Is that what you just called ?"

"...... great, Elsa."

Jin looked at Erza's face again and said admiringly. Erza's cheeks turned redder when he said that to her face.

"...... thanks to my brother Jin. He taught me that magic is all about image.

Indeed, Jin had repeatedly taught her the importance of image when using engineering magic. The same is true for general magic as well.

Erza realized this and quickly became a first-rate healing magician, one of only a few in the world.

The healing potion, or rather the cure, that Elsa made for me was clear and transparent.