‘In this classroom, there should be no problem-’

William compared the two practice classrooms assigned to him and finally made a choice.

Compared with other classrooms, both classrooms have been extra reinforced by magic, and there are abundant protective equipment - mats, thick blankets, and even protective glasses commonly used in greenhouses.

William flipped through the cabinet below the podium, and there were herbs such as white fresh to stop bleeding and bottles for placing potions.

‘Well, this is the bone-producing spirit, this is the anti-emetic, this is the treatment of coma-why don’t you even have a label?’

While complaining about the unreliability of his former professor, William used magic to mark the bottle and then closed the cabinet door.

Although he came to experiment with magic, this classroom was not a private practice field for him. In the future, students always used it when they came to class. He had to check the facilities and other things first.

"There is no problem with the medicine. It has not expired, so the mat needs to be dried - this is a problem for the house elves, but there is no hurry to do this. Anyway, I don't have the preparation for practical classes for the time being."

After confirming that all the measures were good, William used magic to drag a dummy for himself - this was used to test the power of the spell.

——

"Hey, you guys say, will anyone really go to Lockhart's club?"

In the school corridor, Ron, who had just finished his morning study, asked his two partners.

"It should be - will?"

Harry replied hesitantly, a little uncertain.

"In addition to the dramatic performance, he has come up with new tricks - those letters were not written to him by himself, right?"

"Impossible, Ron--"

Harry refuted Ron's opinion in a rare way, "I replied to it all night, and the letters came from all over the country."

"Yes - all over the country, maybe my mother also contributed a letter." Ron responded unhappily, "But I think that's not a yelling letter."

Mrs. Weasley is a fan of Lockhart. Harry knew it during the summer vacation. He wanted to laugh, but when he thought of the yelling letter, he held back.

"By the way, Hermione, what about you, you won't be in that club, are you?"

Ron asked curiously, then got a moment of silence.

"You want to attend?"

His voice couldn't help but rise a little.

Then the three of them suddenly saw the door of the classroom next to the road suddenly opened.

When they looked over, the three of them involuntarily took a half-step back. Although they had seen all the people coming, they didn't know why at this moment, but they gave a state of being unaware of the stranger.

When the visitor saw them, he looked at them in surprise, then nodded slightly, then locked the classroom door and walked towards the distance without looking back.

It was not until the visitor walked far away that the three of them breathed a sigh of relief, looked at each other, and found that everyone was the same before they came to their senses.

"Just, that was Professor William?"

Although it is common in restaurants and even Hager has introduced him, Ron can't help but ask questions.

"Yes, yes, it's him."

Hermione nodded heavily. The professor was the second worst-skinned professor she had ever met. The other party had no idea why today, as if he had changed someone else.

——

After returning to his office and swallowing two chocolate frogs hard, William collapsed on the chair and breathed a long sigh.

‘It’s so scary. I was still me just now?’

William raised his arm and looked at the wand that had just given him one of the last warmth, using it to summon a blue flame in mid-air.

Throwing the flames to the fireplace, William dragged the chair over and began to recall the training just now.

The training of the silent curse was completed very smoothly. After reading enough materials, he had no effort to overcome the previous difficulties because of insufficient knowledge reserves and completed the tasks he preset for himself a lot in advance.

So, he started unplanned training.

As a professor of the wizard's self-defense magic learning course, no matter how he changes the course name, his preparation process will inevitably encounter black magic - if he can't even understand it, how can he fight?

He originally knew some dark magic, but how could those compare to Hogwarts' huge library?

As a professor, William himself can read all the information in the library without anyone's approval. During the preparation process, he easily recorded the black magic that was targeted by various targets.

After the original magic test was completed, he changed the test dummy and began to practice black magic one by one.

To his expectations, he could just pick up those simple black magics at will, but the black magics that he had a little difficulty in understanding were not difficult during the test process - like the body remembered earlier than the brain and learned about these magics.

Even though he remembered that black magic should not be abused, every spell casting was a test of the mind and soul, and stopped in advance with great restraint. The concentrated negative feedback also gave him a completely different experience.

‘The reason for bad weather causes bad mood? The reason for jealousy that suddenly popped up in the morning? The reason for being cursed?’

On the fire, William calculated the reason why he stopped training a lot in advance but was slightly out of control - in that case he felt as if he had become extremely calm and arrogant, and his whole personality became conflicting.

He even felt that he had used the third vision to look at himself - the feeling was as if he had opened up God's vision, which made people uncomfortable, but he still wanted to sink.

‘Suspend the practice of black magic. I have to consult more information to continue to start daily training. I just tried eleven magics. So even in battles, the amount of black magic used cannot exceed at one time. Well, more than eight!’

Lying in the office, William silently sets rules for himself, and then warns himself that it is best not to touch the black magic in the next week.

After a long time of struggle, under the flames, he finally felt warm, and the cold feeling of keeping people thousands of miles away was completely eliminated from his mind.

'The wizards who study these all day long are probably mentally problematic. Although these spells are either amazingly powerful or have weird normal magic, they cannot do it after being exposed to them for a long time, they are not less distorted than the broken place in Azkaban - wait, is it because I have been in Azkaban, so I was greatly affected?'

William made a speculation.

Dongdong.

There was a knock on the door outside the door, "Professor, it's me, Bart - lunch time is up, are you going to the restaurant for dinner, or am I sending it to you?"
Chapter completed!