Huang Laoxie handed over the Sacred Domain Token to Lin Fei.

handed over a key to the library to Lin Fei.

"This key is the key to the underground vault of the library, and it has always been only qualified by the director! I now appoint you as interim curator for a period of one month! ”

"This library's underground vault contains the oldest and most valuable books in the entire alliance, I hope it can be helpful to you this freshman tryout!"

"As for the cultivation issues, I have never liked to interfere, although you are my disciple, there is no need for you to guide your cultivation as a teacher! Master leads the door to practice in an individual, and as a strong person, you must go out of your own way! ”

"Alright! The gossip is endless, there are still important things to do as a teacher, so you can cultivate by yourself! I remember that a month later, I will leave a mark on my 13th Academy at the freshman exchange competition! Get out of here! ”

After speaking, Huang Laoxie waved his hand.

The secret space suddenly cracked like an eggshell.

The two return to the real universe again.

Lin Fei looked at Huang Laoxi's lonely back, a little unbearable.

Thinking that the other party's life span is less than three years, there is an indescribable sadness.

So, he took the initiative to ask.

"Master, apart from the Magneto-Mother Aurora Bead, what other treasures in this universe can renew your life?"

After hearing this, Huang Laoxie finally showed a smile on his face.

Immediately, he said coldly.

"The world in my body is on the verge of collapse, my soul is on the verge of extinction, even if the world in my body is reshaped, I can only survive for thousands of years at most, if I can find the legendary world tree, I only need a branch, maybe I can restore my soul, and the vitality remodeling may be expected! It's a pity that the World Tree was extinct as early as the ancient times, and I searched the entire universe, and I don't know...... That's it! Since you have a heart, help me keep an eye on it! Anyway, I only have three years to live, and if you find any trace of the World Tree, it will be a great favor for me......"

Huang Laoxi's tone was cowardly, and the whole person seemed to lose his luster in an instant.

As everyone knows, when Huang Laoxie said this.

Lin Fei's heart beat violently a few times.

Especially when you hear about the World Tree.

Lin Fei was even more soul-shattering.

"Fortunately, no one else knows about my own World Tree! It seems that this World Tree is more precious than I thought! Even the injuries of the emperor-level powerhouses can be repaired......"

Lin Fei's heart was shocked inexplicably.

was hesitating to tell Huang Laoxie that he had the World Tree on him.

But Lin Fei was worried that once the other party knew that he had the World Tree, would he kill himself.

After all, the reputation of the Evil Emperor has always been not good.

And, when I saw myself just now.

Lin Fei clearly felt the murderous aura on the other party's body.

So, Lin Fei decided to hide the secret that he owned the World Tree.

At least, you can't be easily exposed until you have enough strength to protect yourself.

After Huang Laoxie left.

Lin Fei staggered back to the dormitory.

At the moment, the door of the library is locked, and if you want to enter, you can only wait until tomorrow.

So, after Lin Fei returned to the dormitory, he fell asleep.

In order to avoid leaking his secrets, after entering the Thirteenth Academy, Lin Fei rarely entered the evolution space.

Although people are sleeping, they have not stopped cultivating.

In his sleep, the power of the blood veins in Lin Fei's body was still constantly refining the cells of his body.

Yin and Yang True Thunder are also constantly converting to each other, refining every cell in the body.

Meanwhile.

In the soul space, Lin Fei's soul consciousness was still constantly contemplating the brain of the universe.

In addition, Ling Ling did not take a moment to spare, he was still constantly studying Lin Fei's Cosmic Brain, constantly developing the Cosmic Brain, and transferring the virtual cosmic network to Lin Fei's Cosmic Brain.

Early the next morning.

Lin Fei went straight to the library, took out the key and entered the underground vault.

This underground vault is a hidden library, encased in a special spatial barrier.

Without a key, even an emperor-level powerhouse would never want to break in.

This underground secret space is very special.

When you walk into it, you don't see any book scrolls.

There are no bookshelves either!

There was only one forbidden ball of light, colorful, suspended in the void, like stars in the sky.

Looking at these dazzling balls of light, like the vast starry sky of the universe, Lin Fei couldn't help but be shocked!

"There's a lot of books here! I'm afraid I won't be able to finish reading these books in my lifetime?! ”

Lin Fei's face was shocked and inexplicable.

I felt completely overwhelmed by a sea of books.

"There are so many books here, and there is no catalogue or book lending system, so how can I find the books I need?"

The book that Lin Fei urgently needed most now was notes on cultivating the Quenching Technique.

Because although he has cultivated to the ninth level of the body quenching technique, and also has the reincarnation memory of killing the god Bai Qi, his own cultivation situation is special.

As a result, he didn't have any mature cultivation experience to learn from.

Secondly, Lin Fei also wanted to collect some ancient pills, especially pills that could wash the meridians and cut the marrow, help quench the body, or increase soul cultivation, which was also the best choice.

Again, there are some sources about the Sanctuary. After all, knowing oneself and knowing one's opponent will win all battles, this time the Universe War Academy Freshman Exchange Tournament will be held in the Holy Domain, so it is inevitable to collect more information about the Holy Domain.

After thinking for a moment, Lin Fei directly awakened the Pu Demon and the Demon Hou in the brain space.

"Pu Mo, Demon Marquis, is there a way for the two of you to help me find the books I need?"

The soul projection of the two demon kings appeared in the secret space, and after wandering around, they replied to Lin Fei.

"Back to the master! This place is forbidden by your Terran array mages who have arranged powerful formations, and your subordinates can't do anything! Pu Mo's face was gloomy, and he lowered his head, indicating that he could not do anything.

Immediately, Lin Fei's mind moved, and he withdrew the Pu Demon Soul Body into his body.

Then, he turned his head to look at the Demon Queen.

"Master, I have a way for my master to find the books and materials he needs! Hopefully, though, the host will be able to find a book for me! ”

The Demon Marquis rarely mentions conditions.

Since he made a request at this moment, it was not too much, so Lin Fei immediately nodded and agreed.

Anyway, now that the origin of the demon soul of the demon marquis is in his own hands, his anger is only in his own thoughts.

So Lin Fei spoke.

"No problem! Say, what book do you want me to find? ”

The Demon Marquis held back the excitement in his heart and said slowly.

"Dark Grimiac"

Although, Lin Fei didn't know much about what this dark tome was.

But feeling that it was the first time that the Demon Marquis made this request so solemnly, he understood that this so-called Dark Magic Book must not be an idle thing.

"No problem! I can give you the Dark Codei, but I must keep it for a while! ”

"Deal!"

The Demon Marquis readily agreed, in fact, even if Lin Fei didn't agree, he had no choice.

And out of his understanding of Lin Fei, the Demon Marquis knew very well that once Lin Fei made a decision, he would not change it!

After successfully buying the Demon Hou, Lin Fei got what he wanted.

"Master, the formation prohibition used in this underground vault is guided by soul thoughts, as long as the master's soul perceives it, it can automatically check the catalog information of each book in the light ball prohibition!"