I've already become a Hogwarts professor, and the system only just appeared.

Snape was about to end the giant's life when Su Yu suddenly noticed that his leg seemed injured, so he asked, "What happened to your leg?"

Snape said haughtily, "None of your business."

Su Yu didn't take it seriously, knowing this guy's personality too well, so he continued, "Then let me guess, you didn't go to the fourth floor, to that room the principal forbids students from entering, did you get bitten by the little cutie inside?"

"How much do you know?" Snape turned around and glared at Su Yu.

"Not too much, but I think there's something very important hidden inside. You're not planning to sneak away and steal it behind Dumbledore's back, are you?" Su Yu teased.

Snape hesitated for a moment. He hadn't seen Su Yu for more than a decade, and he couldn't be entirely sure whether Su Yu was still the same as before.

But considering that Su Yu defeated the troll and saved Harry, Snape thought there was nothing suspicious about Su Yu. However, he didn't want to say much about Dumbledore's arrangements, so he sneered, "Yes, are you going to expose me?"

"No, no, no, I have no intention of exposing you. If you really want to steal it, I will help you, as long as you let me study it after you're done. You know, I am also an alchemy master." Su Yu stated his position.

"So you already know what's hidden there, right?" Snape's brow furrowed.

"Is it hard to guess?" Su Yu shrugged.

Su Yu's words weren't entirely directed at Snape. It's quite possible that Dumbledore was watching from around the corner at that moment, and even if he wasn't, Snape would most likely have relayed his words.

Since obtaining the Moonstone, Su Yu's research on the magic network server has made some progress, but he has also encountered some problems, the most important of which is the source of magic power.

If he builds a server, but it requires hundreds of wizards to supply it with magic every day to run properly, then the server is not very meaningful.

After some thought, he decided to test Dumbledore in this way to see if he could get his hands on the Philosopher's Stone, or if he could take it and study it.

He had actually wanted to say these words when he was facing Dumbledore on the fourth floor that day, but given the circumstances, Dumbledore clearly had some doubts about him. Even if he brought it up, Dumbledore would never consider it and would only deepen his suspicions.

But today's situation is different. He protected Harry's trio, defeated the troll, and his identity was perfectly clear. He could then state his demands without hesitation. Even if Dumbledore disagreed, he wouldn't be able to do anything to him.

Seeing that Snape ignored him and continued to deal with the troll while limping, Su Yu said, "Do you need my help? Perhaps I should take you to Madam Pomfrey first."

Snape didn't even turn his head and said, "Absolutely not. Don't forget, I am a Potions Master myself. I can handle this little injury by myself."

"Alright, give me the 100 Galleons first. I'll get the blood and bones from you tomorrow!" Su Yu said, picking up the large wooden club from the ground.

"You... fine, fine, wait a minute!" Snape was almost laughing in anger. Was he afraid that Snape would embezzle the 100 Galleons? He drew his wand, cast a piercing spell, and pierced the troll's carotid artery.

Blood spurted out, and Snape pulled out a small bottle. Guided by his wand, all the blood flowed into the bottle.

However, the ruthless expression on Snape's face became twisted and terrifying under the bloody light. Even Su Yu felt a chill run down his spine and his hair stood on end. If any student saw this, they would definitely have nightmares that night.

"Haha, I was just kidding. I'm not in a hurry for the gold coins. You go ahead and do your work. I trust your character, you definitely won't renege on your debt!" After saying that, Su Yu turned around and left quickly.

Meanwhile, as Harry, Snape, and his friends walked back to their dormitory, Harry said, "Did you guys see that? Snape's leg looks injured."

“I saw it, but so what?” Ron asked.

Harry said, "Why do you think trolls would suddenly appear in the school?"

"Who knows? Maybe it's just Pippi's prank, adding some fun to Halloween," Ron shrugged.

Harry and Hermione looked at Ron simultaneously, their eyes filled with concern for intellectually disabled children. Hermione asked, "You mean, the troll was deliberately placed in the school, but what was his purpose?"

“Do you guys remember that three-headed dog on the fourth floor? It had a trapdoor under its feet, and it was guarding something,” Harry said.

Hermione suddenly realized: "So the troll was just a distraction, that person's real goal was the things guarded by the three-headed dog on the fourth floor, and Professor Snape just happened to be injured. Oh, that can't be! He's the professor!"

Ron finally understood the conversation and said, "What happened to the professor? Snape must have released the troll and then secretly went to the fourth floor, which is why he was bitten by Cerberus."

If Su Yu were here and heard their analysis, he would definitely applaud them. With only a few fragmented pieces of information, the three of them actually managed to piece together the general direction of the matter.

Unfortunately, because of their prejudices, they suspected the wrong person. So the saying that prejudice is a mountain in people's hearts is indeed very true.

"Then what should we do? Why don't we go tell Professor Su Yu? He'll definitely help us!" Hermione said to Harry and her friend.

"What should we tell Professor Sue? Tell him we suspect another professor is trying to steal something from the school? We know nothing about it, it's all just speculation," Ron said dismissively.

"Then what do you suggest we do?" Hermione glared at Ron.

Harry quickly intervened, saying, "Hey, don't do that. Maybe we should investigate what Snape is trying to steal!"

“How do we investigate?” Ron asked.

“Hagrid, I think he must know something,” Harry said confidently.

Su Yu ignored Snape and went straight back to his office. Over the past month, he had made considerable progress in the manufacturing process of the magic phone.

After mastering the Transformation technique, Su Yu had even more ideas. Perhaps he could combine Transformation with Alchemy to create a semi-automatic integrated casting press for some key components.

As for why not go straight to full automation, firstly, it's unnecessary. The driving energy of the casting press is magic, so it would definitely require hiring a special wizard to output and operate the magic.

This way, the wizard employee can also perform some miscellaneous tasks such as adding raw materials.

Secondly, his strength doesn't allow it. According to Su Yu's current experiments, to carry out fully automated integrated casting, the time required for material input needs to be fine-tuned based on individual magic attributes.

In other words, if you change the wizard who outputs magic power, all the previously set automatic data will be rendered useless. If the materials are still automatically added according to the previously set time, the final product will most likely be a waste.

Even for the same wizard, his mood, mental state, and level of concentration will affect the material refining time, thus affecting the material delivery time. Therefore, semi-automatic is currently the best choice.

Throughout Halloween, Su Yu was busy with his research, so he didn't participate in the parade organized by the children.

It was nearly midnight when there was a knock on Su Yu's door. When he opened it, he was surprised to see Harry, Ron, and Hermione.

"Hey, you three, showing up here at this hour, I'm going to deduct points from your license!" Su Yu said jokingly as he ushered the three of them into the house.

“I know you won’t really do it!” Hermione said confidently, head held high.

Su Yu found it a bit amusing, wondering where this little girl got her confidence from, so he said, "Alright, it seems I have to show my authority as a teacher. Gryffindor, because of the three of you, each of you loses one point!"

As soon as Su Yu said those words, the system notification sounded: Gryffindor's Enemy 2 is complete, and another general skill point has been obtained.

The three little ones who had just sat down opposite them were collectively petrified. If Su Yu really followed the school rules and judged them as night owls, he could deduct 10 or even 20 points from each of them.

The three of them were speechless at the professor's decision to deduct one point from each of them. In their opinion, it was just that the stingy professor wanted to play a prank on them.

Of course, they had no idea that Su Yu was only 2 points away from completing the "Gryffindor's Enemy 2" achievement in his system. He thought he would have to wait until tomorrow to complete it, but late at night, the three little ones gave him a bonus, so he decided to take it.

"How childish!" Hermione muttered, pouting slightly.

This evaluation almost made Su Yu deduct another 10 points from them, but he held back and asked, "Coming so late, you don't just want to chat with me, do you?"

Harry spoke first: "Professor Sue, we'd like to ask you, who is Nicolas Flamel?"

Hermione added, "Professor, I've searched almost every book in the library and haven't found any information about him. I'm sure you, a Ravenclaw graduate, know him."

"Where did you hear this name from?" Su Yu asked curiously.

"Hagrid!" the three exclaimed in unison.

Su Yu suddenly realized that if it was Hagrid, then there was no problem. So he asked again, "Then why don't you just ask Hagrid directly?"

“He won’t say anything more. We’ve tried many methods, but we haven’t been able to get anything out of him,” Ron said helplessly.

Su Yu said, "Then why do you think I would tell you?"

“Because we’re friends, aren’t we?” Hermione said.

Su Yu nodded: "A very good reason. In that case, I'll tell you. Nicolas Flamel, a legendary figure in the alchemy world. You should have seen his name on the Chocolate Frog card."

“Impossible! I’ve collected almost all the Chocolate Frog cards. I can confirm that there’s no Nick Flamel card!” Ron denied immediately.

Su Yu shook his head: "It's not Nick Lemecca, it's Dumbledore!"

All three were taken aback. Harry reacted the fastest, as he happened to have a Dumbledore card on him, so he quickly took it out to check.

Character: Albus Dumbledore, Headmaster of Hogwarts, widely regarded as the greatest wizard of his time.

Key points for the back side introduction:

In 1945, he defeated the dark wizard Grindelwald; discovered twelve uses for dragon blood; made great progress in alchemy with his partner Nicolas Flamel; and enjoyed chamber music and ten-pillar bowling.

Harry suddenly realized and said, "I felt like I recognized the name. I've seen it here before."

Hermione's question was clearly more meaningful: "So, Professor Sue, what exactly makes this Mr. Nicolas Flamel a legend in alchemy?"

"Why? Of course, it's because he refined the only existing magic stone, and he used the magic stone to make the elixir of immortality. As of this year, he is already 665 years old." Su Yu's voice sounded like that of a little fanboy who admires a great figure in the industry.

"665 years old, my goodness, that's incredible!" Ron exclaimed instinctively.

Hermione and Harry exchanged a glance and said, "So, what Headmaster Dumbledore hid in that room on the fourth floor was the Philosopher's Stone!"

"What are you talking about?" Su Yu asked knowingly.

Harry and Hermione took turns telling Su Yu their guesses and suspicions about Snape, and finally said, "Professor Su, you must stop Snape."

Su Yu waved his hand: "Hey, hey, hey, little guys, your minds are a bit too complicated. Snape couldn't be that thief, and no one could steal Dumbledore's things from Hogwarts."

“But if Snape wasn’t the thief, how could his leg have been bitten by that three-headed dog?” Harry countered.

Su Yu was in a bit of a dilemma. As Snape's friend, he knew about Snape's past and also had some understanding of his future.

To be honest, Su Yu didn't want to see Snape go down the same old path. This time, Snape was on his must-save list, but when facing Harry, Su Yu didn't know how to tell him about Snape's past.

After all, this involves a lot of Snape's personal privacy, and Su Yu didn't want to make it public without his consent.

After hesitating for a long time, Su Yu finally said, "Harry, I told you before, I know your parents, right?"

Harry nodded, looking at Su Yu expectantly, only to see him continue, "In fact, your father and I are not friends. Strictly speaking, we are more like... enemies!"

Upon hearing this, Harry, Ron, and Hermione were stunned, staring at Su Yu in disbelief, waiting for him to reveal the truth.

Su Yu took a sip of water and said, "Your father, James Potter, was a very talented wizard, but at the same time, he was also a very... mischievous wizard."

"When he was in school, he and a few other friends formed a prank group called the Raiders."

"They would play pranks on some classmates, such as hanging them upside down from the roof, just like I did to Malfoy before. Snape was one of their victims."

"It was around that time that Snape and I became friends, and together we formed the Snake-Hawk Duo to fight the Marauders, your father's crew."

"Of course, these are just children's games. Your father grew up to become a pillar in the fight against Voldemort, and Snape became an excellent professor at Hogwarts."

"They are all great people, great wizards, so never let your prejudices blind you and cause you to overlook the real details."

After hearing Su Yu's words, Harry seemed to be petrified and didn't come back to his senses for a long time. He never expected that his father would be a bully.

"Professor Sue, did my father...do he do anything bad to you?" Harry finally asked weakly.

Su Yu laughed and said, "Harry, you don't need to think too much about this. When people are young, they will do some extremely childish things. Besides, my lifelong enemy has never been your father, but another person in the Raiders team."

Chapter 31 SOS Message

When Harry walked out of Su Yu's office, he seemed a little dazed. He couldn't believe that his father was a bully in school.

Hermione clearly noticed Harry's state and comforted him, "Harry, don't be like that. It's just a conflict between children. Professor Su Yu also said that your father is a pillar in the fight against Void and a great wizard."