Finally getting out of everyone's sight, Nie Yifan quietly walked towards the Aoyiku in the corner of the campus.

Now with the spread of the fact that he has won the hearts of two school girls, he is already a thorn in the eyes of a group of male classmates, and he is fine in the school, but it will be dangerous to go out, and he may encounter someone who knocks on a stick, and the mysteries that he learned below cannot be exposed, and he has to master several new mysteries as soon as possible, after all, he is prepared.

According to this half-day understanding, there are all kinds of human crystals on display in the Upanishads, although they are not as precious as the earth crystals when they studied the Xuandun back then, but fortunately, there is no risk in cultivating human crystals, and practice makes perfect.

Therefore, all kinds of large and small human crystals are safely displayed on the shelves of the Upanishads, allowing students to choose freely, but in order to prevent some people from being greedy and chewing too much, all students can only choose one kind of human crystals here at a time for cultivation, and only after the mysteries have mastered a certain level of proficiency, can they receive new human crystals to study again.

"Hello teacher, I'm a new student Nie Xingchen, and I want to borrow a human crystal to study. Coming to the door of the Aoyiku, Nie Yifan flashed the student ID he had just gotten to the administrator of the Aoyiku.

"It turned out to be Nie, the first person in the school's combat power, I am fortunate to be happy, please inside. When the administrator saw that it was Nie Yifan, he was stunned at first, and then, as if he had met an old friend, he actually got up in person, picked up his student ID card, looked at it, and handed it to Nie Yifan with both hands.

"Thank you. This person was so polite, Nie Yifan hurriedly returned with a polite smile.

Led by the caretaker, the two walked through a long walkway and stopped in front of a wooden door about five meters high.

The material of this wooden door is very ordinary, even Nie Yifan, a layman, feels that the wood is soft, and the style of this door does not match this ridiculously arrogant school at all.

Nie Yifan looked at the wooden door, and at the same time, the administrator took out a key half a palm-length from behind him, and slowly inserted it into the keyhole of the wooden door, and the wooden door opened silently.

"A hundred years ago, the first building built by the Firmament Private Middle School was this Aoyi Library, and then the third hero of the Firmament personally blessed this wooden door, so that this ordinary wood will not rot for a hundred years. ”

Seeing Nie Yifan stop in front of the door and look at the high lintel, the administrator also stopped and patiently explained. He has seen a lot of this kind of students who are stunned when they see Upanishum, whether they are the children of the family or the commoners, they all have such expressions when they come to Upanishum for the first time.

Can the blessing of a hundred years ago persist until now? This is definitely not an ordinary mystery, has it reached the prefecture level? Thinking of this, Nie Yifan was full of expectations for this Upanisha, and then stepped into the door of the Upanishn.

"The left area is the offensive mystery, the middle area is the defensive mystery, and the rightmost area is the auxiliary mystery, the area currently open to you is only these, each of which has a thousand mysteries, enough for your daily study, Nie, you take your time, and when you choose it, you can register directly with me." ”

The administrator looked at Nie Yifan, who was standing in front of the door of the Aoyiku in a daze, smiled and explained and turned to leave, and then the wooden door slowly closed, and the administrator returned to the registration gate of the Aoyiku, unexpectedly he did not sit down, but hung a sign of today's vacation in front of the door of the registration entrance, and then returned to the wooden door and stood in the center of the door.

Nie Yifan looked at the hundreds of rows of wooden shelves in front of him and the glowing mysterian crystals on them, and said that it was fake if he was not shocked.

Once upon a time, an Aoyi crystal nucleus that made everyone grab their heads was like a cabbage here, and the key was that it was all free, which was the difference between the top and bottom of the sky.

Slowly walked to the wooden frame in front of him, and the five human crystals were neatly placed on the wooden frame in front of him, these are all defensive mysteries, and there is a simple introduction card in front of each mystery.

The first mystery that catches your eye is called moving a mountain, using spiritual power to personify a mountain in front of you, the higher the spiritual power, the larger the volume of the mountain, the stronger the defense, and its mystical proficiency is to be able to personify a complete mountain shape as qualified.

Nie Yifan's heart began to itch after reading the introduction, most of the other people's fighting defense is with a shield, and using this mystery can directly recruit a mountain over, and the momentum is definitely a lot of wins, but this thing is suitable for providing all-round defense for the team in group battles, and now there are many opportunities for him to fight alone, so he still has to learn the mystery of single defense.

Then look down, the second mystery is the vine armor, which uses spiritual power as a thin line to form a virtual vine, and finally attaches to the body to form a vine armor, specializing in defending against the mysteries of heavy attacks, and the mysteries are proficient in being able to cover the upper half of the body with the rattan armor.

Then Nie Yifan browsed the mysteries on the shelves one by one, and he really didn't know how to choose for a while.

Time passed bit by bit, but fortunately, the number of defensive mysteries was only thousands, and I don't know how long it took for Nie Yifan to complete all the defensive mysteries, and then looked at the offensive mysteries.

Compared with the defense of the mystery, the attack of the mystery is more desirable, some of the mystery can open the mountain and crack the rock, some of the mystery can penetrate the armor, and even there are whirling sneak attacks, flying to the sky and other strange mysteries.

After reading the attack on the mystery, Nie Yifan's face flushed, and he was really stimulated.

Looking at the auxiliary mysteries again, Nie Yifan is even more undecided, there are no less than dozens of mysteries here just to stop bleeding and heal, and then there are various mysteries that continue to enhance physical strength, and even have various strange effects such as being able to use mental power to personify the body, as a derivation of the body, and so on.

Nie Yifan browsed them one by one, and his breathing became more and more rapid, these are the crystallization of the wisdom of his predecessors, if he can learn them all, wouldn't he be an invincible existence?

After this thought was bred in his heart, it quickly took root, Nie Yifan's mind was in a trance, and the spiritual power in his body accelerated up, but the strange thing was that he was unaware of it.

The footsteps did not stop, Nie Yifan was still looking at the vast mystical ocean in front of him, his eyes gradually became blank, but his heartbeat gradually accelerated.

His consciousness gradually dissipated, and Nie Yifan couldn't extricate himself as if he had entered a demonic barrier.

What am I doing?

The little will left in his heart gradually sank into the deep pool like a drowning man under the suppression of this demonic obstacle, unable to extricate himself.

The caretaker standing outside the door looked up at the dim light at the entrance, then shook his head slightly, turned around and inserted the key he had already held in his hand into the keyhole.

But in the next second, the administrator sighed, as if he had discovered something that surprised him.

It turned out that the spiritual power that overflowed in Nie Yifan's body towards the surroundings suddenly paused, and then, the overflowing spiritual power contracted rapidly towards the body, not only that, but the many spiritual powers remaining in the three thousand mysteria crystal nuclei actually began to slowly overflow, and all the spiritual power turned into small dots and began to converge towards Nie Yifan's body, and for a while, countless fireflies lit up in the dim mysteria room, and then they flew and spun, converging towards Nie Yifan's body, and gradually formed a storm composed of spiritual power points.

The forbidden technique of the gods flowed unconsciously, and then Xuanding operated, all these chaotic spiritual powers were purified and integrated into Nie Yifan's body, blessed to the heart, a mouthful of mantra was slowly recited in Nie Yifan's mind, and finally the faster he read, an emerald green point of light gradually took shape in Nie Yifan's mind, and then the light point condensed and formed, a bead the size of a grain of rice floated quietly at an inch within Nie Yifan's eyebrows, with five fingers on both hands, and then clenched his fists, his eyes suddenly opened, and two one-foot-long emerald green lights directly penetrated the darkness and illuminated most of the Mystery Library。

How did he do it?

After the caretaker at the door saw this scene, there were ripples in his heart that had been silent for many years.

It is not easy to see through the demonic barrier, but he can actually attract the spiritual power in the crystal nucleus, unless his exercises reach the time of breakthrough.

Looking at the curve of the flow of mental power, a smile appeared on the administrator's lips.

I knew you weren't dead, no wonder I had a familiar feeling as soon as this kid came in, it seems that I was right, the real forbidden art has long been listed as a forbidden technique by the Council of Elders, and now the versions circulating in the market are all castrated versions, this kid lit up the talent stone after you really woke up, in vain I have guarded you for so many years.

The administrator slowly pulled out the key inserted into the lock hole and stood quietly outside the door again.

After a while, the door of the Aoyiku slowly opened, and Nie Yifan walked out of the half-open door with a calm face.

"Are you still there, teacher?" After seeing the administrator by the door, Nie Yifan was very surprised, did he need the administrator to wait here specifically to choose Aoyi?

"Three thousand mysteries refine the heart, and overnight, you will become the first person on the combat power list. The administrator said kindly to Nie Yifan.

"What is the meaning of this, please give me advice. ”

Nie Yifan bowed to the administrator, just now he was really almost lost in the Mystery Library, if it weren't for Hongmeng's reminder, he really wouldn't have woken up, and then relied on the Divine Forbidden to converge the Mystery, and unconsciously touched the spiritual power in the crystal nucleus, and as a result, the source of the spiritual power that the person who asked for help said was generated in his mind, these are things that he never expected, I thought these were all coincidences, but after going out to see the administrator, Nie Yifan knew that these were not coincidences, but inevitable.

"The powerful power will make people lose themselves, forget the original intention, while people practice the mysteries, their own magic barriers are also slowly breeding, when people are strong to a certain extent, the magic barriers will become a mountain that hinders their own growth, throughout the ages by this mountain interference, suppression, and even crushed to death countless people, so there is a saying of refining the heart, each of the mystical crystal nuclei actually has the will of the predecessors, although this will is very weak, but after reading a large number of crystal nuclei in a short period of time, even if you don't study deliberately, the crystal pattern will in the mystery will also have an impact on people, forming a magic barrier, you can wake up by yourself, very good, very good。 The administrator nodded at Nie Yifan in praise.

"Thank you, teacher, is this heart refining a compulsory course for every student?" Nie Yifan said curiously.

It was actually very dangerous just now, and the overflow of spiritual power was a manifestation of scattered power, but since the benefits are so great, it is better to ask He Xiaoshi and Wu Cailing to come too, Nie Yifan thought beautifully.