Because Yang Su's classes were too long, there were only two classes a week, one for the third grade, and the other for the fourth grade, who was temporarily transferred to his own course.

The other class was in the afternoon three days later, so Yang Su was not in a hurry. Changing out of the chair, sitting in an open space somewhere in the academy, quietly sipping the mellow coffee.

Looking at the little wizards in front of him hurriedly approaching the classroom, Yang Su seemed to remember the scene when he was a student when he was a child, and he was often late and was punished by the teacher for standing.

However, the teachers at Hogwarts are all pretty good guys, and they aren't too harsh on these little wizards except for Filch, a natural squib administrator.

But it's also interesting to watch these little wizards being chased by Filch.

For example, at this time, the Veles brothers' prank once again violated the school rules, and they were also absent from school and were chased by Filch. Since the course they escaped was Professor Binns's History of Magic. The boring old ghost wouldn't punish them, so the two of them were left to Filch to deal with.

At this time, the two brothers seemed to want to open some secret door and get rid of Filch directly, but unfortunately no matter what they did, they couldn't open the door in front of them.

"I knew you were going to want to escape through these tunnels." Filch, who looked at the Veles brothers approaching in front of him, spoke, "I have sealed all the secret passages that can be sealed. Even if you use magic, you will not be able to open the sealed door. ”

Watching poor Veles brothers being led to Professor McGonagall by Filch, Yang Su smiled and looked at the playground on the other side. The playground at this time was filled with Gryffindor students. They are Quidditch players, practicing their Quidditch skills on the field. Captain Wood looked a little distressed, as their team's original Seeker had graduated. None of the current team members can do it.

……

Leisure time always flies so fast. On the afternoon of the third day, Yang Su once again entered the classroom ahead of schedule. And a trap was laid at the door of the classroom.

This student's name is Ryan, a Gryffindor, although he was born a pure-blood wizard, but he does not have much prejudice against ordinary people, he is a big fan of Dumbledore. It seems that the decision to take Yang Su's course was also made after Dumbledore's reminder.

Although Yang Su didn't know why Dumbledore would remind a dragon who had no deeds in the original book to take his own course, he still wanted to give this fourth-year little guy a try.

Ryan, who is a year older than the three little ones a few days ago, has even more powerful magic. He noticed something strange about the ceiling in the doorway, and although he was in Gryffindor, he didn't seem reckless at all. With an easy wave of his wand, he released an obstacle under the ceiling, and after heavily sealing the dimensional crack opened by Yang Su, he quickly opened the door of the classroom, walked in, and greeted Yang Su, "Hello, Professor Robin." ”

"Well, sit down, Ryan." Yang Su, who looked at the student who was close to him, nodded, and after releasing the Rubik's Cube to restore the classroom door, Yang Su said with a smile: "You are very good, you can react after sensing the abnormality above your head." This trap will not be in effect again this year. But the next year, when your mana is basically up to the mark, it will turn on randomly, and all you have to do is prevent the magic above your head from taking effect the moment it is activated. And not like it is now. ”

"Alright, without further ado, let's start the first lesson. To perceive spatial nodes, first you need to concentrate. I'll use magic to help you observe the various nodes of space. All you have to do is familiarize yourself with the feeling. And it's easy to see without my help. ”

As he spoke, Yang Su released his magic power and shrouded Ryan's body. At this time, Rien, like his three juniors, saw the scene full of spatial nodes.

Since this time it was a one-on-one teaching, Ryan gained more than his younger siblings.

After Yang Su withdrew the magic, Rien quickly relied on his own strength to see the spatial node according to the feeling he had just felt. Although he still didn't see clearly with Yang Su's help, he succeeded. Yang Su couldn't help but thank Dumbledore for introducing him to this genius.

"It seems that you have a very sensitive sense of space," Yang Su said excitedly as he looked at Lien's appearance, "Even with my help, those three third-grade students can only see the most obvious spatial node. ”

"Thank you, Professor. I wouldn't have seen this beautiful scene without your help. The myriad spatial nodes draw me in like the stars in the Milky Way on a summer night. I will definitely do my best to learn this course. ”

"I'm glad you can say that, but since you can already see the spatial node, let's try driving mana to attack it. There are no specific magic spells in Dimensionology, and all I say when I cast a spell is the name of the attack. Dimensionalism focuses on the mastery of magic and the connection with other dimensions. ”

"All I can teach you is the control of magic, and the connection with the other dimension is mainly up to you, remember that the danger when you contact the other dimension is abnormal, even I can't protect you."

Listening to Yang Su's solemn words, Li En said that he would definitely practice hard. Seeing this gifted teenager indulge in dimensional magic, Yang Su didn't know if he could lead it to the right path.

Human curiosity is limitless, especially when one is very fond of something in itself. And the most fatal thing for dimensionalism is a strong curiosity.

The extradimensional void is inhabited by creatures that ignore terror, and even a glance at them would drive them mad at their presence.

There is no doubt that dimensional science has terrifying power, but no matter what profession it is, it is nothing if it doesn't grow up, but it seems that there is no need to worry so much for the time being, and it is almost impossible for them to contact dimensional life when it is very difficult to even see the spatial node.

Besides, as long as you are at Hogwarts, no matter who uses dimensional magic, you can't escape Yang Su's perception.

"Teacher, I succeeded."

At this moment, Yang Su's ears heard Lien's excited voice.

I saw him holding a stone the size of a grain of rice in his hand, and excitedly said how he made it condense.

"Looks like you've got the point." Listening to the other party's words, Yang Su said with a smile: "But it's not skilled, this dimensional stone can only be regarded as a defective product, do you know?" The power he contained was simply not enough to enhance dimensional magic. Even normal magic attacks don't get much of an amplification. Just because you know something doesn't mean you can use it. ”