Shikkaku Mon no Saikyou Kenja~ Sekai Saikyou no Kenja ga Sarani Tsuyoku Naru Tameni Tenseishimashita~

"Book?"

"Oh. A book."

With that said, I open the box.

Inside, there were ten very familiar books in the previous life.

"... that's a letter I've never seen."

"That's a very thick book...... which letter is this?

In this day and age, no decryption of the ancient civilized language has taken place.

Probably the influence of the Demons.

"Matty, can you read this?

"Oh, I can read. … is the letter of an ancient civilization"

I'll open the first page.

There it was written in ancient civilized language as' General Magic Book '.

It was the most widely disseminated magic book of all time.

From beginner magic to advanced magic used on the front lines at the time, this book has been served with a number of magics.

The total number of pages extends to 5,000, so it is divided into all ten volumes… This chest contained all of those ten volumes.

... I remember everything about this book, so it's something I don't need.

"What, Matty, can you read ancient civilized language?!?

"That's a curse to death..."

There have been rumors in this day and age that 'if you try to decipher the words of an ancient civilization, you will die by the curse of an ancient civilization', but the part 'if you try to decipher it, you will die' will not be a mistake either.

But it's not a curse.

"... I think it wasn't a curse, it was the devil's work that killed the guy who tried to read the ancient civilized language."

"Of the Demon Clan... Oh, to make the unchanging magic obsolete?

"That's what I'm talking about"

When you can read books written in ancient civilized languages, you risk being mastered by unchanging magic and other techniques from those of that era.

Keeping the guy likely to succeed in decryption assassinated is natural crisis management.

"That means you don't have to die, Matty!

"Originally, Matty, you're not going to die like a curse... So, what does this book say?

That's how Alma refers to the General Magic Book.

I turn the page of the book once and see if the contents are the same as they used to be before I answer.

"This book says how to use and type of unchanging magic.... I know all the magic on it, so it doesn't make much sense."

"All!? Give me this thick book!?

"Oh. I've read this book before."

In fact, I haven't just read it.

Part of the General Magic Book was written by an old me.

I had this book when I was quite young, so there are some old and some wrong parts for me right now.

"Even if I've read it, I'll take all of this book..."

"Memorization is not a level... I knew you felt like Matty..."

... What the hell is "Matty feels like you"?

I hope you don't make unsolicited adjectives.

That's for sure.

"The question is, why was this book put here?"

"Isn't it for the Demons to read? The magic books of ancient civilizations, they look amazing!

So Alma pointed to the magic book.

But the Demons probably didn't know this book existed.

This hidden room is not the type that can be opened and closed again and again.

"At the time we entered the room, the hidden door was not open. It opened only after we walked into the room."

"... I mean?

"Someone must have created a hidden door to open even when there was a fight in this room. Do you want to collect it?"

That's what I'm gonna do. I'm gonna make the book storage magic.

Did the guy who made this hidden room want to teach the no-chant magic to the humans of today?

As an introductory book to unchanging magic, textbooks from the second school are better...

... Did you make it so that the Demons could read it when it came to trouble?

Well, neither this book nor anything useful, so will I donate it next time I go to second school?

The quality of the content is subtle, but it's no different to a book that contains a ton of magical knowledge.

With that in mind, I left the stash.

There's still something we need to do here.

"That, where are you going?

"It's the central control room at the source. Stop the spill of poison from the source"

The water storage lake at the source is huge, so if you leave it like this, it will take time for the poison to completely fall out.

It's troublesome if you misuse your vitality by then, and let's purify the poison before you go home.

"Can you do that?

"Oh.... it's a supermassive demon prop, so it's powerful where it's moving"

That's what I'm gonna do. I'm gonna open the door to the central control room right off Central Water Reservoir Lake.

The bookshelves in the control room were already weathered and broken, but the magic props inside were only made assuming long-term use, and everything seemed safe.

This is the first time I've manipulated this myself, but well I'll figure it out.

With that in mind, I manipulate demonic props.

This time it simply purifies the water quality, so no more complex operation is required.

Just maximize the output of the purifying apparatus and that's enough.

"All right, let's go"

That said, I'll get the water purifier fully operational.

Then... from the surrounding walls, I began to hear a roar.

At the same time, the ground under your feet starts to shake a little.