The four fundamental forces of the universe refer to the strong interaction force, the weak interaction force, the electromagnetic interaction force, and the gravitational interaction force.

Among them, in terms of pure strength, the strongest is the strong interaction force, which belongs to the interaction force between quarks, which overcomes the strong repulsive force generated by the electromagnetic force and tightly bonds the hadron into the nucleus.

And among the four fundamental forces, the weakest one is...... The gravitational force that Pei Chen mastered. The interaction between all objects with mass, manifested as the force of attraction. The law is the law of gravitation, and the more precise theory is the general theory of relativity. However, the weakest of the four fundamental interactions, much smaller than the strong interactions, the electromagnetic interactions, and the weak interactions, are usually not considered in the study of microscopic phenomena.

However, everything in the world is not absolute, but relative. Although gravity is almost negligible at the microscopic level, it can play a huge, even decisive, role between massive objects, such as celestial bodies.

Because the effect of gravity is achieved by the field, that is, the curvature of space-time caused by the particles, or by the quanta of the exchange field.

Of course, for Pei Chen, even if he knew that the future of this kind of cosmic power was great, he could only stare dryly at the moment. After all, he still has a long way to go before he can fully develop the mystery of this power.

"At present, even if you try your best, you can barely only affect part of the force field of the planet, and you can only take advantage of it a little...... If you want to really exert influence on the space-time anomaly, you can't say that it is already a skill level of level 7......"

Holding his head, Pei Chen was a little depressed. He has worked hard for such a long time, practicing the subtle manipulation of the gravitational field almost every moment, and so far he has only felt that the skill threshold from level 5 to level 6 has been loosened, and he wants to improve to level 7...... It makes me feel hopeless just thinking about it.

"Forget it, take your time, most people are leveled up with their skills......"

With a fierce wave of his hand, he manipulated the invisible gravitational hand to choke the throat of the werewolf who pounced in front of him, and held it high in the air, allowing the latter to continue to struggle and roar. Pei Chen frowned without a trace, and once again threw the black giant wolf that stood up fiercely and flew out!

The Forbidden Forest borders the Quidditch pitch just outside the school, but when it comes to the true size and level of danger, it's hard to say. The Forbidden Forest is very large and off-limits to students because there are so many dangerous species living in it, especially werewolves and vampires.

Some of them were afraid of these murderous creatures, even the three-headed dog and even Phoenix Fawkes, let alone ordinary students. Even a seventh-grade senior apprentice would not be allowed into the Forbidden Forest.

However, Pei Chen was not a student, so this rule was naturally ignored by him.

"How big is this Forbidden Forest Nima...... he said with a wry smile, and when he looked back, the dense and gloomy jungle and twisted branches and vines had completely obscured the path from which he came. He'd been walking in the forest for two hours, but the infinite space still hadn't made the quest for the hidden map successful.

But he couldn't get around, this black forest was obviously also part of Hogwarts School of Witchcraft and Wizardry, and getting the exploration progress of this place in his hands, Pei Chen was equivalent to losing the biggest piece of cake. A fool would do that, so he decided that he had to turn this forest upside down.

"But that's all for today...... It's time to go back. ”

"Roar!" The huge werewolf with a height of two meters broke a big tree, and he was still able to struggle to get up and fight again without fear of death, which made Pei Chen's eyebrows raise in an instant. How brainless is this guy? Could it be that after letting the wild dominate the body, even the IQ will be lowered?

The werewolf's speed was extremely fast, and it had already rushed in front of Pei Chen in less than three seconds, and bursts of fishy wind came to the nose, making people feel disgusting and vomiting. Then, with the sound of something shattering, the werewolf flew backwards, its head bursting like a watermelon, and it was completely dead.

Pei Chen shook his hand, feeling that the skin of his arm seemed to be cracked a little by the huge anti-shock force, and a slight pain came.

However, his attention was no longer on this, it was just a subconscious action.

"Apostle number 1065, you have killed the [anomalous creature-werewolf] hidden in this scene! Exploration progress has increased! These anomalous creatures are only a part of the magical world, so keep up the good work! ”

"Hah! It turns out that in addition to exploring the map, killing unknown creatures is also considered a way to explore? Pei Chen's eyes suddenly lit up, "So, those magical creatures such as vampires, unicorns, dragons, and phoenixes should also be classified into this category, right?" …… Well, I just don't know if those wizards are 'anomalous creatures'? ”

As he spoke, he couldn't help but get excited, and there was a strange, ill-intentioned glint in his eyes. Eventually, he even wanted to add wizards, the masters of the wizarding world, to his list of prey.

Some people's bottom line is really lower!

……

……

"Dear Mr. Mercury, a sage from the ancient East, I don't know if you can ......" Hermione was holding a written report and reading it aloud, but was interrupted by Pei Chen waving his hand.

"Put away your damn aria, I get a headache when I listen to it...... And you don't look at what kind of place it is, don't talk so loudly. ”

"Then my purpose has been accomplished." The girl smiled happily, but she obediently put down the paperwork in her hand, carefully observed the surroundings, and then looked at the Oriental wizard in front of her curiously: "You are going to be a teacher in this school?" ”

"I haven't agreed yet, okay?" Pei Chen said angrily, now the two of them are in a corner of the library, Pei Chen originally just came here to take a quiet rest and check the information by the way, but he didn't expect to see the letter of appointment brought by Xueba and her here.

"Are you going to agree, then?" Hermione seemed a little excited, and kept whispering that it was because of the ban on loud noises in the library, otherwise she would have spoken louder.

"What's the matter with you?" Pei Chen waved his hand and made a gesture to catch flies, "Even if I really serve as the professor of the magical creature protection class temporarily, it has nothing to do with your first-year students, and you don't set up this course." ”

He was so annoyed, why didn't that old man play his cards according to common sense?

But there is no way to do it, because the identity of the substitute teacher of this magical creature protection class is too timely, which means that he will have an officially recognized identity. He could explore the secrets of Hogwarts as he wished, as long as he wasn't too sensitive, and he didn't have to worry about anything sneakily like he had before.

In doing so, he felt that he would be able to figure out most of the secrets of the entire magic castle in half a semester, and he might even reach out to other places, such as the Azkaban Wizarding Prison he had heard of, or Hogsmeade, a pure wizarding village near Hogwarts School of Witchcraft and Wizardry, or simply some other wizarding school.

It's really hard to do! How to choose? He sighed.

Hermione said, "How can it be okay, you're my pet, aren't you?" As she spoke, a sly light flashed in her eyes, looking at Pei Chen's embarrassed expression, obviously not wanting to talk more about this dark history that made people's faces dull.

Pei Chen dared to guarantee that if someone else was brave enough to talk about this topic in front of him, he would be taken to the manure fertilizer field in less than three seconds as soon as the topic was opened! But it was an eleven-year-old girl who talked about it, and he had no way to do it.

In the end, it's all about her own brains, and it's none of Hermione's business.

"The Magical Creature Protection class has three periods a week, all for different grade levels, which are the second period on Monday afternoon, the second period on Wednesday afternoon, and the first period on Friday morning...... And our class happens to be out on a Wednesday afternoon, so I can check it out! Hermione said this, wrenching her fingers as she calculated, as if she had already thought about what was going to happen next.

"Forget it, I'll have to think about it...... By the way, Hermione, how did this offer end up in your hands? Pei Chen was a little curious.

"I didn't know, but Professor McGonagall stopped me at the end of class." Hearing the other party call her name for the first time, Hermione was slightly stunned, but quickly reacted, "I didn't know where you were, and I wanted to go to the lake to have a look, but I didn't expect to see you when I came to the library to return the books." ”

"Is there such a coincidence?" Pei Chen was a little suspicious.

He didn't believe it too much, after all, the power system of this world was a little evil, and it was really not unusual to say that there was something strange that could accurately capture his location.

"You still say you didn't mean to come down?" Hermione asked suddenly.

"What?!" Pei Chen couldn't react for a while, until he followed her gaze and saw the book he had found before and spread out in front of him-"Magical Creatures Illustrated Book: 1956 Edition", and then he understood, and then his eyes became a little strange.

He cleared his throat and said to Hermione in a serious manner, "If I say that the reason for reading this book is just to think about what kind of magical creatures to poison and which one is easier to kill...... Would you believe it? ”

Sure enough, in exchange for little Lori's neuropathic gaze.

"Trust me, I'm serious."

“……”

"I'm not nervous, and I'm not joking."

“……”

"Don't you think it's very emotional to slay a dragon or something? Don't you believe it? I'm afraid even Dumbledore has beaten ......"

“……”

"Well, I'm actually having a nerve." Pei Chen touched his nose and said this, and then Xiao Lori finally reacted, and seemed to agree with his words. In these days, no one will believe the truth!

What a pity! It seems that the dragon-slaying plan needs to be put on hold for a while, and he will have to deal with the goddamn task of being a substitute teacher for the protection of magical creatures first. Pei Chen stood up with infinite regret, glanced at the book spread out in front of him, and then slowly closed it.

Hermione stood on tiptoe with some curiosity and glanced at it, but only barely saw a pattern, which was a particularly eye-catching behemoth covered in scarlet smooth scales, "Are you interested in the Chinese Fireball Dragon?" I've heard that they are the only fire dragons in China. ”

She couldn't help but ask.

Pei Chen glanced at her, then thought about it, and nodded: "That's right, I'm interested." ”

How could you not be interested!? The Chinese dragon is actually this bird-like winged lizard, how can he not be interested?

It's ...... I can't wait to go over and slaughter them!!