“n。” A whisper came from behind them.

Roach turned his head and looked at Mahjong in surprise, "What did you say?" ”

Mahjong was drawn to their conversation, and looked at the snake-shaped totem that the body twisted into and swallowed with its mouth. "It means mandala, which represents the energy center in ancient mage medicine, which I saw in a book in the school library. Oh yes, this thing's name is Ouroboros. ”

Ouroboros? Roach was taken aback, but the name was a good one, "Isn't this a mathematical symbol for humans?" Meaning infinity in mathematics? ”

"This symbol is much older than a mathematical concept," said Mahjong slowly, "the first day determines the last day, just as the snake's tail should return to the snake's mouth, and it will end at the same time as it is born." ”

"What is this? Is it your secret word? Guan Xinyue asked with some awe.

"No," Mahjong shook his head, "from a book left by a mage on another continent long ago, called the Book to Friends. ”

"I haven't read it." Roach said regretfully.

"I haven't read it either." Du Zhengyi said, "Mahjong is a doctor, and the number of ancient documents he has read is not comparable to that of ordinary people. ”

"It's not an important book anyway." Mahjong said, "But the image of the Ouroboros is actually all over the world, and I remember the mages who lived on the plateau, and they also had the mark of the Ouroboros. ”

"Tibet?" Luo Qi was surprised to say that only a small number of their mages lived in Tibet, and most of them lived in seclusion and did not have much to do with Qionglin. "Is it also engraved near the public station? If this symbol represents the energy center, it makes sense to engrave it on the public station. But why is the Ouroboros also carved in the temple dedicated to Daikokuten? That temple isn't a public inn, is it? ”

His last question turned to Du Zhengyi, and Du Zhengyi nodded affirmatively, "It's not a public station, I don't even feel any special power there." ”

"Not exactly." Mahjong said next to him. "As far as I know, this Ouroboros emblem is known to the Highland mages as the Endless Knot, and it represents the cycle of life and death."

Du Zhengyi suddenly glanced at mahjong, the meaning in his eyes was incomprehensible, Luo Qi vaguely felt Du Zhengyi's mood fluctuate for a moment, he was inexplicably a little scared, and now he is simply a frightened bird. "Is it a curse? As soon as Du Zhengyi arrived here yesterday, he experienced a near-escape from death, which was simply a cycle of life and death. Why don't I smooth this Ouroboros? ”

Mahjong didn't know what he was thinking, but he couldn't hold back his laughter, "Roach, you said you" He couldn't go on, and it was always difficult to maintain his estrangement from Roach, and in the end it could only become helpless, "Can you make us serious for a while?" ”

"Yes." Guan Xinyue said, "You are a barbarian who destroys public property, which is equivalent to carving words on the pyramid, do you know? ”

Mahjong laughed and continued, "Ouroboros is roughly equivalent to immortality, and according to the Highland Mage, Ouroboros is a supreme creature capable of self-reference and infinite loops. ”

Luo Qi listened and pondered for a moment, "It means that it is very awesome?" ”

Mahjong was upset with his simplicity and rudeness, but he couldn't say he was wrong.

"So Da Hei marks Ouroboros everywhere, which means that he is very cool and cool, so cool that he jumped out of the five elements and crossed the boundary between life and death?" Roach said with a look of disbelief, "Is there such a great mage?" ”

Mahjong and Du Zhengyi didn't speak, Guan Xinyue waited and couldn't help but say, "Da Hei wants to engage in cult worship, which god doesn't say that he has crossed the line between life and death?" If not, would there be believers? ”

Luo Qi felt that what Guan Xinyue said was very reasonable this time, and nodded frequently.

Du Zhengyi looked at the vicinity carefully again, and shook his head, "Forget it, don't delay any longer, let's get out of here." ”

Luo Qi couldn't wait to leave, "You told her to contact her on WeChat next time, right?" Let's go, I don't want to be near a place like this again. ”

Du Zhengyi didn't answer, and mahjong knocked him on the head.

The return trip was calm and there was nothing to say, but the matter of accompanying Guan Xinyue to go shopping was in vain. Guan Xinyue is actually not very energetic, and said that she never wants to go out again, and now she wants to go back to her bed and lie down.

When they returned to the ancient town in the evening, even Luo Qi felt that it was very kind, and he wanted to live in Du Zhengyi's single-ended building. Now that he has experienced such an unwarranted disaster, he doesn't feel that the courtyard here is too narrow. Guan Xinyue ate something casually and went back to her room to rest very early. Luo Qi carefully sent her back to the room, awkwardly apologized, and told Guan Xinyue that if he was scared of nightmares at night, he could go to him, and he must be very good at driving nightmares. But Guan Xinyue was sleepy and didn't have time to understand his apology.

Du Zhengyi and Mahjong lit the lamp downstairs and chatted casually. Roach didn't go down, lying on his stomach on the bed upstairs.

He tried the keyword "Ouroboros" on a search engine and was taken aback by the abundance of relevant search results. Mathematically, Ouroboros represents infinity. In modern physics, Ouroboros describes the concept of particle physics and the universe, symbolizing the intersection of the concept of the smallest and the most significant, in other words, the Ouroboros represents existence. From an occult point of view, eating his own Ouroboros is clearly not stupid, but rather a little odd, and Roach thinks that eating himself is obviously a paradox. But from another point of view, the big snake eats its own tail to survive, and its own tail can allow him to survive indefinitely, so the existence of the Ouroboros is an eternal mode of existence. No wonder Mahjong said that the highland mage believed that the Ouroboros was a self-referential cycle of life and death, representing the endless knot.

Roach pondered, and he realized that the image of the Ouroboros actually filled the world, spanning human and mage cultures, just like people in every civilization have experienced some kind of similar secret.

He shoved another bite of crispy peanut beans into his mouth, bit it loudly, clicked it again on Guan Xinyue's laptop, and turned a page of the book spread out on the bed. Oh yes, the parallel Roach is amazing.

His door was rudely pushed open from the outside.

"Roach!" Du Zhengyi said at the door.

"What's the matter?" He lay on the bed and pondered, and shoved another crispy bean into his mouth.

"Isn't it my bed you're lying on?" Du Zhengyi said calmly.

"Hmm." Roach said, indifferent, and turned another page of the book. "Eat beans?"

"What are you doing?" Du Zhengyi asked.

"I'm waiting to talk to you about Ouroboros." Rocky said lightly.

"If you dare to eat in my bed, the two of us will already break up." Du Zhengyi said, "I'm going to kill you, and Mahjong can help me clean up your body." ”