Over the course of several days, Ashen began reading books related to magic theory, swordsmanship, and world history.
He did this to understand the world he currently lives in.
Despite this, Ashen still tries to find a way so that he can also use magic and swordsmanship, like the people in this world.
In the lessons that Ashen had been doing for the past few days, he had discovered a theory that might be unique to him.
The theory is about an ancient language that is often used to carve runes on objects.
However, to be able to use the runes in the ancient language, the user must use the mana in their body to activate the rune.
"Huh, why does everyone have to use mana?" Ashen said, frowning slightly and looking a little annoyed with the illness he currently had.
Because he was a little annoyed, Ashen tried to take a short walk around the city near the Virelda kingdom.
At that time, he seemed amazed by the splendor of this kingdom.
He even tried to buy various foods to try for himself.
Ashen said while tasting the food, which was very delicious for him,
"The food here is actually delicious."
"The city buildings are also big; it looks like a beautiful fantasy world."
After tasting the food and walking around the city, Ashen returned to his home.
However, on his way home, he saw a unique ancient building.
The building turned out to be a bookstore about existing theories and history.
Ashen also seemed interested and immediately went into the shop.
And at that moment, he saw the figure of the shopkeeper who had long ears, sparkling eyes, and a beautiful face.
Then the shopkeeper said,
"Would you like to buy a book, sir?" The shopkeeper said kindly to Ashen.
At that time, Ashen seemed amazed by the beauty of the shopkeeper.
He seemed to see a grown woman whose face looked like a young person.
Then the girl introduced herself,
"I am Aera'Mythram, sir, you can call me Aera."
"Here I am, the shopkeeper and owner of this shop."
Then Ashen returned the introduction in a friendly manner,
"Ah, nice to meet you, Miss Aera."
"I am Ashen Duskreign. I would like to purchase a book in this shop."
Hearing that, Aera seemed to know what kind of book Ashen was looking for.
Aera then led Ashen to a bookshelf that looked a little worn.
And showed Ashen a rather unique book. A book on the theory of using magic without an innate mana core.
The book was pitch black in color, and the words 'Ars Codex' were written on the cover.
At that time, Aera also explained that this book was the right book for Ashen to learn about how to use magic without having to rely on the mana core in the user's body.
However, we must rely on nature by absorbing the natural energy that exists around us.
It was also unique for Ashen to know that there was a theory book that might be suitable for him to research further.
However, Aera also gave a warning and explanation that this book is very difficult to understand, because there is no explanation of how to use it, only theory.
This book is also very dangerous.
And it is also said in the book that the user must be in a state of near-death first to be able to use this book.
Long ago, there was a stranger, not from this world, who tried to use this book too, on the condition of being near death, but still failed.
In fact, before he could use this book, the method immediately took the person's life.
That's why the book is outdated.
Nobody wants that book anymore.
In fact, it is no longer useful, because this world already relies on the mana core and aura core innate in the user's body.
Therefore, people who cannot use mana or aura no longer exist in this world.
Except for foreigners who aren't from this world. Because their abilities come from their own world.
However, there are fewer and fewer foreigners coming from this world.
Because many people think they are very dangerous if they are left alive.
That is Aera's explanation regarding the history of the book.
However, Aera also seemed surprised that there were still people native to this world who couldn't use their mana core.
That person turned out to be Ashen Duskreign.
Aera could tell because she was of elven descent, and elves themselves could sense whether humans had mana or not.
While Ashen's body looked different, he wasn't without mana.
However, the mana inside Ashen's body seemed dirty and continued to eat away at Ashen's body.
Even though Ashen doesn't feel pain, Ashen's age will continue to decrease.
And if Ashen tries to use his mana core, it will hasten his own death.
Aera estimates that Ashen's lifespan can only last until the age of twenty.
Because of that, Ashen can't use his mana core forever.
At that time, Aera looked worried about Ashen's condition. She said,
"Sorry, sir, I suggest you do not use this book."
"Because it will endanger your life."
Hearing that, Ashen laughed and looked a little happy.
He laughed because he had found a glimmer of hope, even though it was only a small hope and could even cost him his life.
Then, Ashen thanked Aera and immediately bought the Ars Codex book.
Aera also can't stop the desire of someone who wants to live longer.
And that made Aera remember her past, where so many of her friends and family died before her.
After purchasing the Ars Codex book, Ashen returned to his home.
He started reading the book seriously in his room.
As he read the book page by page, Ashen could clearly make out the language used in the book.
On the first page, it seems to only explain the differences between people who use mana and those who don't.
This made Ashen's face a little less than satisfied, as he clearly knew the difference was huge.
However….
After reading a few pages, a sentence came to Ashen's mind, and he felt that it was very fitting for him.
"This….?"
"The theoretical explanation of this book is really crazy?!...."
Then, suddenly, the book seemed to float in the air.
Ashen was surprised to see that the book could float by itself.
"What happened…?!"