From the intermittent text, Ling Xiaoxian obtained several messages:

"Mist", "Demon", "Flame Between the Fingers".

"Isn't it interesting?" said Tsurukure, "At what point did the demons already exist, and besides, what does the flame between the fingers mean......?"

Ling Xiao's tears immediately thought of the Chiyan family, "Could it be that they are fire magicians?"

Crane Yin nodded and smiled, "Everything is just speculation, it's hard to say whether the Qing Chijin Empire and the Chiyan family are related." And what does the 'fog' refer to, is it the breath of darkness, and is it worth exploring whether the breath of darkness only existed in the depths ......of the earth at that time?"

The more Ling Xiao's tears listened, the more energetic he became, inspiring his heart to explore the mystery.

"It's just that after the fall of Dongtu, the archaeological work on the Chijin Empire was interrupted, and the location of the imperial ruins is still a mystery. ”

"Could it be that after the fall of Dongtu, that empire also collapsed?

Tsuruin smiled and retrieved the fragments of the miner's diary, and carefully sandwiched it between the title pages of the book, looking at them kindly:

"Once upon a time, there was a student like you who liked to ask me all kinds of questions. Alas, it's a pity that the current students only know how to practice magic, and they are too little interested in history......"

Ling Xiao scratched his head with tears and said with some shame, "Have you ever had students with so many problems like me before?"

Crane Yin wanted to speak and stopped, with some sadness in his eyes.

"By the way, I remember...... That student's pre-graduation thesis is still in the archives, which should help you understand the history of the Eastern Continent, and I can find it for you......"

"Really, great!"

The two of them followed Tsuruin to the side of the library, Tsuruin's back was slightly lumped, his hands behind his back, and he walked very slowly.

In the corner of the library, there was an inconspicuous small door, Tsuruin took out the wand in his cuff, waved a light, opened the magic seal on the stone door, and the stone door slowly rose upward. With another wave, he lit a star-moon-shaped lamp on the indoor dome, and a faint glow scattered on the four walls.

"This is the archives. ”

Tall bookshelves fill the space, similar to the outside of the library, except that the shelves here are lined with scrolls and countless file drawers along the walls.

Crane Yin walked deeper, took a thin booklet from the shelf, and handed it to Ling Xiaoxi.

"That's it. ”

Ling Xiao tears away the thick layer of dust on the cover, and saw the title on the cover: "The Theory of the Three Realms in One".

"Three realms in one?" she was stunned for a moment, surprised by the bold conjecture.

"Which three worlds, the human world and the demon world...... Is there still a divine realm?" she asked in disbelief as her voice trembled. Although I am interested in history, I have never had such an idea.

"Alas," said Tsuruin, sighing with some sadness, "he was one of my favorite students, and there was a sparkle of genius in him everywhere. The Three Realms are one, and only his courage and courage can come up with such a theory, although in the High Academy of the Divine Domain, it is only considered absurd and nonsense. ”

Ling Xiao hurriedly flipped through the pages, "This book is amazing!" she exclaimed, her gaze quickly wandering between the lines, "This person's research on ancient history is simply too thorough, it's hard to imagine that he is a person of our age." ”

Tsuruin didn't explain again, but just said meaningfully:

"It's a bold idea with little evidence, but it helps you to open up another idea. You know, the truth is sometimes in the hands of a few. ”

He took out a pamphlet that stood diagonally in the same compartment, handed it to Black Feather, and said:

"Attributeless mage, just take a look at this book, this is a spell created by my student, and there has never been such a spell on the continent, maybe it will help you. ”

"Oh, thank you, teacher. ”

Kuroba couldn't imagine that Tsurugakure-sensei remembered his lack of attributes, and admired his carefulness and attention to his students. However, he didn't have much hope for the spell he didn't understand, so he just took it casually, and the cover read: "The Art of Dark Spell Time and Space".

He flipped a page at random, but was fascinated by what was on that page. "Countless planes and planes, all in the same plane. ”

"This is a spell that can change time and space!" Black Feather's eyes almost fell on the page, and he shouted, even Ling Xiao looked at him in surprise.

Obviously, this is a spell developed on the basis of the theory of the Three Realms in One, and it is indicated that only the "Origin Power" that is different from the Nine Magic Systems can be learned. However, Black Feather wondered again, what did "Origin Power" mean, did it refer to the dark power?

Besides, is there really such a powerful spell......

"Teacher, can I take this book back and read it?" Ling Xiao asked with tears.

"Yes, you can take it back if you like. ”

At this time, Tsuruin had already walked out of the archives, and his figure disappeared behind the bookshelves.

When Black Feather and Ling Xiao walked out of the library, the academy was already shrouded in a hazy moonlight. Many of the students had also returned from outside the school at this time, and the lights in the dormitories were on one after another. They walked through a garden in front of the library, in front of which was a fountain of babbling water.

Ling Xiao was completely immersed in the book, and while looking down, he walked to the bedroom, feeling happy. Inadvertently, she flipped another page, and suddenly, a delicate pale blue bookmark slipped out of the page. She was stunned for a moment, reached out and picked it up, held it up in the moonlight, and couldn't help but stop.

"What's wrong?"

Kurofeather walked with his hands in his pockets, the books he had taken out of the library tucked under his elbows.

Bookmark ......

Ling Xiao didn't come back to his senses for a long time in tears, so he looked at it in a daze.

"I know, he flipped through those ancient books to search for evidence of the 'Three Realms Theory of Oneness'...... The owner of this bookmark is the person who wrote the book!"

Just as she was pleasantly surprised to come to this conclusion, a figure suddenly flashed in front of the fountain. It was a graceful girl, with her hands crossed at her waist, and this fluffy foxtail was swaying behind her.

"Bad guys, don't move!"

She exclaimed, and the two of them looked at the short girl with a pair of fox ears on her head, a fiery red dress, a teenage appearance, and a few slender whiskers on her face.

"Demon Clan?" Ling Xiao thought to himself.

"What's the matter, beauty, what are you doing in our way?" asked Black Feather.

"Purr ......"

The girl seemed to be very angry, and a string of angry sounds came out of her throat, and she said angrily:

"I've wanted to steal these two books for a long time, but unfortunately the old man set a seal at the door, and today I finally got my chance!"