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

Professor McGonagall didn't believe a word of what Old Deng said. She knew all too well how idle the old man was; if he had time, he'd rather eat a few more candies in his office.

Su Yu frowned almost imperceptibly. It seemed that Dumbledore was here for him. He wanted to see his current strength.

"Let him see," Su Yu thought. At Professor Flitwick's command, Sirius and Su Yu walked ten steps back to back to each other on either side of the dueling arena.

At the same time, Sirius turned around and launched an attack immediately. As expected of the second-in-command of the Raiders team, just by looking at his spellcasting, you can tell that his level is definitely very high.

The wand twirled in the air, and without chanting a spell, a spell, trailing a flame, shot through the air in an irregular trajectory toward Su Yu.

Sirius's movements are flashy and cool, but they're not just for show. His movements make the trajectory of the spell unpredictable and hard to anticipate.

Even with Su Yu's nearly a thousand duels of experience, he couldn't immediately defend based on the spell's trajectory.

Since the landing point cannot be predicted, Su Yu decided to increase the protective area. He extended his left hand and tapped the wristwatch on his wrist with his magic wand.

The wristwatch seemed to be activated, rapidly expanding and changing until it became a steel glove protecting half of the arm.

Su Yu clenched his fist, and a gem rose from the back of his glove's forearm, forming a translucent, dark blue shield centered on the gem.

With a clang, the spell struck the semi-transparent shield in front of Su Yu. As if it had come into contact with a drop of water in an oleophobic layer, it was instantly deflected and bounced to the side.

"Cool! What's that glove? It's so cool!" Ron exclaimed excitedly, pointing at Su Yu from the stands.

Harry was equally excited; he wanted those technologically advanced gloves too: "I don't know, but they must be a new magical gadget Professor Su made. They're amazing!"

On the other side, Dumbledore raised an eyebrow and said to Professor McGonagall beside him, "Minerva, can you tell? It seems that Su Yu has combined alchemy and transfiguration."

Professor McGonagall nodded: "That's right, a very advanced Transfiguration. I remember when this child first came here, his Transfiguration was terrible. In just two years, he's already on par with me. He's really amazing."

Dumbledore nodded. As a fellow master of Transfiguration and alchemy, he could achieve similar effects to Su Yu if he understood the combinations and arrangements of runes.

But the difficulty for alchemists lies in their creativity, and in this respect, Dumbledore felt that he couldn't even come close to the level of the young man in front of him.

"What a fine child! How did he become so obsessed with power?" Dumbledore sighed to himself.

The match continued. After blocking Sirius's attack with his shield, Su Yu waved his wand again, and five small metal ravens flew out from his waist, shooting towards Sirius like darts.

A few days ago, he used the three ravens on his chest badge to seal the Dementors, but Su Yu has not been idle these past few days either, and has made another batch of metal materials similar to the Jumping Pot.

In fact, he had to thank Dracula. Thanks to the guy's corrupting blood, Su Yu was able to see more of the true nature of the Jumping Pot, and the materials he made were now of a higher quality.

Sirius Black cast several petrification spells in an attempt to stop the raven darts, but the spells bounced off the metal surfaces, only slightly reducing the speed of the darts.

But Su Yu continued to output magic power from behind, and the speed of the Raven Darts increased even faster, and it was about to reach Sirius.

Since the spell couldn't stop it, they decided to use a physical form to resist it. Sirius's combat intuition was very sharp, and he quickly found a way to break the deadlock.

He waved his wand, and a large earthen dog sprang from the ground. Then, in just a breath, the earthen dog transformed into a solid metal dog, charging headlong at the ravens.

With a clang, the raven left huge dents on the metal dog, but it was also thrown away by the thick metal dog.

Anyone familiar with Su Yu would understand, upon seeing where the five crows landed, that Su Yu was up to no good again.

For example, Snape smiled slightly and said, "Su Yu won!"

Dumbledore, who was standing not far away, was somewhat puzzled: "He doesn't seem to have a clear advantage right now."

Snape replied, "No, he already has the upper hand."

Just as Snape had predicted, the five ravens that landed formed a fan shape and surrounded Sirius Black. As Su Yu waved his wand, the five ravens transformed into five cannons, using a special move that Su Yu had recently mastered: Five Escapes: Small Barrage Technique.

Five bullets were fired from the turret, each carrying the magic of lightning, wind, fire, water, and earth, and hurtled toward Sirius.

Sirius had never seen such an attack before, so he quickly activated an all-around armor spell. With a bang, five bullets struck the armor spell.

At first, the Ironclad Curse held up. Although huge ripples appeared on the surface of the shield and even cracks appeared, it did indeed stop the bullets.

But then, when the five explosive magical elements came together, that space began to become unstable.

Boom! A huge explosion rang out, and Sirius was sent flying from the center of the blast, crashing hard into the protective barrier at the edge of the arena before slowly sliding to the ground. His wand had also fallen to the ground, clearly indicating that the outcome of the battle was decided!

Chapter 172 Surrounded

"Sirius, are you alright?" Professor McGonagall was the first to rush over, after all, Sirius was her former beloved student.

"Cough cough," Sirius sat up and coughed twice. "It's alright, Professor McGonagall. I was just hit by the shockwave and I'm a little out of breath."

"Haha, it seems that your years in Azkaban have worn down your fighting skills. Now you can't even beat Su Yu!" Judging from the voice alone, it was Snape.

Sirius glared at him fiercely: "Snape, stop with the nonsense. If you're so capable, why don't you try it yourself? Do you dare say you can definitely beat Su Yu?"

Snape was also startled when he saw this move. He didn't expect that the combination of five different elemental magics could unleash such power.

It's easy to see that Su Yu has improved once again this year. If Snape were to face Su Yu now, it would be hard to say who would win.

However, Snape naturally wouldn't say that. He raised his chin slightly, straightened his clothes, and said leisurely:

"I'm sorry, we just had a duel tournament last year. I did win the championship, and my opponent in the final was Su Yu."

Sirius thought this was unlikely. Apparition was not an option in the Hogwarts arena, and Su Yu's move was simply too difficult to dodge.

He turned to look at Su Yu, but Su Yu didn't respond to Sirius. He looked at Snape and said, "How about we have another match today? I feel like I've improved a lot this year!"

Snape glared at Su Yu and said, "I don't have time. I have potions brewing in my office and can't take up too much time."

Snape wasn't afraid of Su Yu; he still had confidence in himself. But confidence was one thing, whether he could win was another. He had just put on a show in front of Sirius Black, and it would be very embarrassing if he lost.

Sirius Black quickly seized the opportunity and immediately mocked, "Hmph, you want to run away when you can't win? If you're scared, just say so. Don't pretend here."

Snape, however, was completely unmoved and maintained his pride: "I won the championship, with the entire school present as witnesses. Why should I explain to a loser like you?"

After saying that, Snape left. Su Yu didn't pay much attention to the outcome; he was currently checking his system notifications.

Ding! Congratulations on defeating Professor Sirius Black in a wizard duel. You can choose one of the following three template specials as your reward.

1. Heart of Nature: Allows you to remain in the Animagus state for extended periods without being influenced by animal instincts.

2. Elegant Casting: You can add some fancy movements during the casting process to guide the trajectory of the spell.

3. Faster Casting: Increases your casting speed by 15%.

The talent "Heart of Nature" was something Su Yu had seen when he defeated Professor McGonagall. It was a very good talent, but it couldn't directly increase combat power.

The second flashy spellcasting technique should be the little tricks Sirius used when casting the spell earlier; they were not only cool but also very practical.

The third one is quite straightforward: a 15% increase in casting speed. In combat, this is an absolute huge boost, meaning that while others can cast 7 spells, you can cast 8, which can sometimes even secure victory.

To be honest, if it were a game, Su Yu would definitely choose the second option. After all, being strong is only temporary, but being cool is for a lifetime.

But this is a real world, and Su Yu ultimately chose option 3. After all, his main fighting style is not magic, so whether the trajectory is real or not doesn't affect him much.

However, if he could increase his casting speed by 15%, he could conjure more alchemical items in a shorter amount of time, which would suit him perfectly.

Sirius had recovered by now. He walked over to Su Yu and asked, "What was that glove that could release a shield? And those crows, they seemed completely immune to spells."

Su Yu's face showed a proud expression. Ever since he drew the epic feat of alchemy last time, a flash of inspiration struck him, and even in the United States, he would take time every week to use this skill.

Many of the details of these new equipment were achieved in a flash of inspiration, but Su Yu felt that he was becoming more and more like that guy from the Marvel Universe next door.

"Haha, you know I've always been an alchemical genius, so it's not surprising that I can do these things, is it?"

"I really didn't need to ask you!" Sirius said with a sullen expression, but then he added, "However, this match isn't too late. I wasn't prepared this time. How about we have another match in a month?"

"What a great deal! I wonder if I can get another freebie from Sirius." Su Yu readily agreed: "Okay! It's a deal!"

After the match ended, Su Yu resumed his daily routine of racking up achievements, having students come up to challenge him one by one.

Dumbledore, Professor McGonagall, Sirius Black, and the others left the classroom. Once outside, Dumbledore asked Professor McGonagall, "Minerva, don't you think Sue's magic seems to have improved again?"

Professor McGonagall nodded: "Yes, he didn't have this much magic when he fought me last year, and his Transfiguration and Alchemy weren't fully integrated yet."

"Even if I faced him again now, I wouldn't dare say I could definitely defeat him. It's astonishing how quickly an adult wizard can improve."

Dumbledore frowned, nodded in agreement with Professor McGonagall, and finally said, "Of all the magic I know, it seems that only dark magic can make a person progress so quickly."

“Oh my goodness, Headmaster Dumbledore, what are you saying?” Professor McGonagall was taken aback at first, then said solemnly, “There is not a trace of evil about Sue. He is a good boy.”

“Of course, of course! Minerva, don’t get excited. I’m just a little confused about what made him progress so quickly,” Dumbledore quickly reassured her.

Professor McGonagall faced Dumbledore and said bluntly, "Headmaster Dumbledore, you cannot doubt everyone just because of one person's failure."

"Su's magic is gentle, it is intense, but it is definitely not evil. He is a good boy. I have seen his efforts, and I think his efforts are worthy of everything he has achieved."

Even Su Yu didn't expect that Mrs. Pince's unwavering habit of going to the library to study Transfiguration had been told to her best friend McGonagall, and that it had won her Professor McGonagall's favor.

Chapter 173 Surrounded

Dumbledore didn't try to persuade Professor McGonagall anymore. He prepared to leave and return to his office, but just then, the temperature in the air suddenly dropped.

"What's going on?" Professor McGonagall also sensed something was wrong and turned to look outside the castle.

“It seems we’re surrounded!” Dumbledore frowned again, but this time he seemed a little angry.

Meanwhile, in the Duel Club, Su Yu was grinding for achievements. He also announced a rule: anyone who could defeat him five times in the Duel Club this semester could join Raven's Feather.

This immediately attracted the interest of all the senior wizards, since everyone had heard that the Ravenfeather members who graduated last year either entered important departments of the Ministry of Magic or became executives of the Ravenfeather Alchemy Technology Company.

For example, Thomas from Gryffindor became the secretary to the new Director of the Department of International Magical Exchange and Cooperation, and Alice from Ravenclaw became the Minister of Publicity for Feather Alchemy.

It could all be considered a meteoric rise. For a time, many people believed that as long as they could join Raven's Feather, their future would be bright. But what they didn't understand was that those who joined Raven's Feather were actually outstanding in their own right.

Regardless, the young wizards' enthusiasm for challenging Su Yu grew higher and higher, and Su Yu also sped up the pace of each match, like a hostess rushing from one party to another, providing emotional value to each young wizard.

Suddenly, Su Yu also shivered. It was only September, and the temperature was already this low? Moreover, this cold could penetrate the soul. It was a Dementor!

Extending his left hand, which quickly covered with an iron glove, Su Yu crushed a petrification spell: "Alright, today's duel is over. Gemma Farley, take the people from Ravenfeather and organize everyone to return to the dormitory. No one is allowed to wander off!"

After saying that, Su Yu also left the classroom and headed towards the castle gate.

“What’s going on?” Harry asked.

Ron shook his head: "I don't know, but something big must have happened, otherwise Professor Su wouldn't be in such a hurry. By the way, don't you guys feel a little cold?"

Reminded by Ron, Hermione's little brain worked quickly, and she said, "Don't you guys feel it? This coldness feels familiar!"

"I think there is a little, but I can't remember," Harry said, scratching his head somewhat embarrassedly.

Seeing that her two companions were still as clueless as ever, Hermione couldn't help but roll her eyes: "Have you forgotten, on the train?"

Harry's face paled. "You mean, Dementors?"

“Impossible! Headmaster Dumbledore would never allow Dementors to enter the castle!” Ron retorted.

“Maybe we should go and take a look, using the Invisibility Cloak!” Harry suggested. Although he was terrified of the Dementors, he always felt that they were somehow connected to him.