"Hey, Headmaster. Thank you for handing over the blueprints of this outfit to Mrs. Morkin, otherwise I probably wouldn't have been able to pay for a wand with just those three Yuanxue books. ”

At this time, Dumbledore, who was busy in the office, suddenly heard Yang Su's voice, and looked up, Yang Su, whose face was still so pale at this time, was standing in front of him in strange clothes.

Putting away the books in his hand, Dumbledore looked at Yang Su in front of him and said with a smile: "I seem to have read it in the newspaper a few days ago, to be honest, I really don't understand the aesthetics of you young people." But it seems that Mrs. Morkin liked the design of the dress very much, otherwise she would not have made it from such an expensive material. Even the materials of this set of magic robes on my body are not as expensive as the materials used in the clothes you are wearing. ”

"Really? I didn't expect me to be treated like this. Listening to Dumbledore's words, Yang Su smiled and asked, "By the way, has anyone chosen my course?" ”

"There are a few third-year students who have taken your course," Dumbledore said with some embarrassment as he listened to Yang Su's words, "It may be that dimensional magic has just been revealed, and few people want to know about this magic." ”

"It's okay, just have students. Even in my world, dimensional magic wasn't very popular. Listening to Dumbledore's words, Yang Su responded with a wry smile: "We are walkers who shuttle through the void, apostles of chaos. Although it is powerful, the further back it goes, the more dangerous it becomes. Even I only dare to teach some simple dimensional magic to the students of my school. And they were forbidden to study that dangerous branch. ”

"It seems that I am right, dimensionality is the same as black magic and white magic. There are several branches below them. Listening to Yang Su's words, Dumbledore analyzed: "What you recorded in the textbooks are some superficial dimensional tricks, and then let the students slowly learn this magic that is not dangerous to themselves, but it is extremely difficult to learn. When they graduate, you'll decide whether or not to teach them the dangerous branches of dimension magic based on their performance. ”

"That's right," Yang Su frankly admitted to Dumbledore's speculation, "For these students, the magic of the deviant system is too dangerous, and those terrifying void lifeforms are not even able to fight against you. ”

"Is the reason why you're weak now because you're studying that magic?" Looking at Yang Su's pale face, Dumbledore, who was smart enough to think of what Yang Su had just said, asked.

"That's right," since the other party had already guessed, then Yang Su was not denying his situation. "I will probably be able to recover by the time school starts. That void creature made a pact with me, and you can rest assured that she won't destroy the school. ”

"I hope you didn't lie to me, even though I'm old, I still have some strength. At least you, weak now, are no match for me. ”

Listening to Dumbledore's threat, Yang Su smiled and raised his hand in surrender, "I don't mean to be your enemy. I also know that this school and this magical world are what you value the most. I'll be in this world for seven or eight years. When my mana is almost restored, I'll leave here and continue my journey. Hopefully, during this period of time, I can develop someone who is good enough to take over my position and continue this course. ”

"I also hope that this course can be kept forever. But you know, if no one in the wizarding world learns it, the magic will still disappear from this world. ”

"So I hope that the children who come to study my course this year will not give up, after all, they are the hope for the continuation of this course."

"Okay, don't be in a hurry to say it so sadly, isn't it a while before you leave."

"By the way, there's something I want to trouble you." Dumbledore, who suddenly remembered something, spoke, "Recently, one of my former bad students has become active. You've probably heard of him, and we all call him the Mystery Man. ”

Listening to Dumbledore's words, Yang Su smiled and said, "Although most people don't dare to call him by his name, I don't think you should be afraid of him." ”

"Haha~" Listening to Yang Su's words, Dumbledore laughed: "I also forgot when I called him the mysterious man with everyone in the wizarding world." But my student may have put a curse on his name. ”

"If there is anything to say, I will definitely help you if I can."

Returning to the topic, after getting Yang Su's answer, Dumbledore took out the Philosopher's Stone that he asked Hagrid to bring.

"It's a philosopher's stone, something that is said to turn stones into gold. That is, the legendary Philosopher's Stone. Use it to make life-extending potions. I want you to handle fishing him. ”

Listening to Dumbledore's words, Yang Su took the philosopher's stone in his hand and asked, "Why do you want to dispose of it, shouldn't the elixir of immortality and the turning of stones into gold be the goal of all alchemists?" ”

"Its side effects are too great," Dumbledore said as he listened to Yang Su's words, "The price you have to pay if you want to live forever is your own magic. If you don't drink the next potion made from the Philosopher's Stone, the magic in your body will be reduced by one point, knowing that you no longer have mana in your body. ”

"What about turning stones into gold?"

"Turning stones into gold, and at the same cost of permanent mana, my old friends are going crazy with things on their backs."

Listening to what Dumbledore said, Yang Su said, "This is not the real Philosopher's Stone, Dumbledore. The stone your friend made is a half-finished product. There's something similar in my world, but it has fewer side effects, and the alchemist maniacs are constantly improving it. ”

"Can you improve it?"

Listening to Yang Su's words, Dumbledore asked.

"No," Yang Su replied to Dumbledore without any disguise, "As much as I would love to help you, learning dimensionalism has taken most of my time. It is simply impossible for me to be distracted from studying alchemy. What's more, the difficulty of alchemy is already higher than that of dimensional science. The individual strength of the real alchemy maniac is not very good. But the terrifying alchemy lives and alchemy bombs under their command are enough to daunt people. ”

"You'd better help me get rid of it." Listening to Yang Su's words, Dumbledore smiled bitterly and said, "Voldemort's men have infiltrated the campus, and I felt it last semester." Even Gringotts wasn't safe, and those goblins weren't any match for the Death Eaters. ”