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

Another week of teaching has passed. On the last day of October, Halloween Eve, the school organized a grand Halloween dinner.

Upon entering the restaurant, you can see thousands of bats on the roof, fluttering their wings, sometimes flying over the tables, sometimes hanging upside down on the roof and windowsills.

Besides bats, there are hundreds of pumpkin lanterns of all sizes, carved with various patterns, some piled up in the corridor, and some floating in the air.

Coal Ball, being a black cat, perfectly fits the atmosphere today and was naturally brought over by Su Yu. At this moment, she is standing upright, dancing with a skeleton, which is both a bit scary and a bit funny.

The students were all seated, and Su Yu soon noticed that all the students at the Gryffindor table were present except for Hermione.

Searching his memory, he immediately realized that this should be a harbinger of the troll event. After being spotted by Dumbledore on the fourth floor last time, Su Yu felt that the old man's attitude towards him had become much more cautious. Perhaps this was an opportunity to turn the tide.

Moreover, the troll has a lot of alchemical materials on it, so if we can get our hands on them, it would be another gift from Brother Quirrell.

Picking up his wine glass, Su Yu went to the Gryffindor table and plopped down between Harry and Ron. The two were already friends with Su Yu through the system, so they didn't stand on ceremony and moved a little further away.

"Why are there only the two of you today? Where's Hermione? Doesn't she usually travel with you?" Su Yu asked directly.

“We didn’t go with her. She always likes to boss people around, nobody likes being with her,” Ron said, sounding both guilty and stubborn.

Harry, who was stuffing a chicken leg into his mouth with both hands, could only shrug helplessly when he heard Ron's words: "Ron said the same thing in the last class, but Hermione heard it."

"And then?" Su Yu asked Ron.

Ron's eyes darted around as he said, "Then...then, she seemed to run away crying..."

Su Yu gave Ron a flick on the forehead, annoyed, and said, "So you made a girl cry and let her leave alone. If your mother knew you did something like this, guess what she would do?"

Ron's face was extremely pale. He said, "Professor Su, please, please don't let my mother know about this. She will kill me."

"Alright, you two stop eating and come with me to find Hermione!" Su Yu ordered.

“But Professor, we have no idea where Hermione is. Maybe she’s already gone back to her dorm!” Harry asked.

Harry spoke quite loudly, and Petil, an Indian girl not far away, heard him and interjected, "Hermione didn't go back to the common room. I just saw her running crying to the basement."

"Alright, you two brats, remember this: from now on, never let a girl leave alone crying!" Su Yu grabbed the back of their collars and left the restaurant together.

The three's actions naturally did not escape Dumbledore's eyes, but he did not stop them. He simply kept a close watch on them through some special means.

The three of them made their way to the basement. Su Yu immediately opened the Marauder's Map app on his phone and quickly found Hermione in the girls' bathroom.

Upon arriving at the bathroom door, the three grown men hesitated. Su Yu said, "Alright, Ron, Hermione is inside. It's time to show your manliness."

"Huh? Me? What can I do?" Ron pointed to himself in confusion.

"Of course, it's an apology. Brave little Gryffindor lion, you wouldn't be too scared to even say sorry, would you?" Now that he had found the person, Su Yu was no longer so nervous and said jokingly.

Ron glanced at the restroom, then at Su Yu, puffed out his chest, and said, "Of course I dare, but... but this is a girls' restroom, it wouldn't be appropriate for me to go in, would it?"

“It’s alright, there’s only Hermione inside. You can go in; she’s in the fourth cubicle from the left,” Su Yu said directly.

"Professor Su, how did you know?" Harry and Ron asked incredulously, wondering if Su Yu had some kind of clairvoyance magic.

Su Yu didn't hide anything and showed the two the screen of the magic phone. The two quickly discovered the magic of the Marauder's Map.

"Cool, Professor Su, what is this? Is it expensive?" Ron asked enviously.

Su Yu said, "It's a little prop I made myself. I don't plan to sell it right now, but you two better watch out. I can see you from it."

Harry and Ron immediately shrank back in fright, feeling as if they were being monitored by Su Yu at all times. But in fact, Su Yu rarely took out the Marauder's Map to use.

Suddenly Harry saw a name appear at the edge of the map, slowly moving toward him. The name was: Troll Skullbreaker.

"What is this? Troll Skullbreaker? Is it a student too? What a strange name!" Harry pointed at the name and asked three questions in a row.

"A troll?" It's here already? Su Yu immediately took back his phone and compared the troll's location with his current position.

Before he could draw a conclusion, a smell mixed with stinky socks and a public toilet that hadn't been cleaned for months hit him.

Then, at the end of the corridor, a creature over three meters tall, extremely burly, with a dull-looking face, and wielding a giant spiked club slowly walked out.

"Hermione, come out! Now! Immediately!" Su Yu roared into the bathroom, disregarding everything else, and pulled his wand from his robe.

Su Yu was not flustered at this moment, but rather excited. After the system's points were allocated, all four skills—magic power, spells, polymorph, dark magic, and defense—had reached LV7.

He felt incredibly strong, but it was hard to say exactly how strong he was. Su Yu had considered sparring with his friend Snape.

However, after a brief observation, he discovered that Snape's spell and dark magic defense levels were definitely above LV8, and inviting humiliation was not a wise choice.

At this moment, the giant monster in front of him presented a perfect opportunity for real combat, and he was even a little worried that this opponent was too weak.

After all, in his memory, Harry and his two friends seemed to have easily dealt with this giant monster. How strong could something be that could be dealt with by three first-year wizards?

"Expelliarmus!" Su Yu shouted, waving his wand. A beam of red light shot out from the tip of the wand. From magic output to magic control, and even spellcasting skills, everything had reached Su Yu's current peak state.

Su Yu was very satisfied with this disarming spell, feeling that it was comparable to the level of LV8. The spell drew a beautiful arc and shot straight at the giant monster. As expected, the unexpected happened.

The giant monster swung its left fist and smashed it fiercely towards the spell Su Yu had shot out. Its movements were slow, but the punch itself was incredibly swift.

With a loud bang, the giant's fist collided with the spell, shattering the spell and leaving a charred patch on the giant's hand. At the same time, a shockwave rippled outwards.

The giant was jolted backward by the immense force, but it did not fall. Instead, it quickly regained its footing and roared angrily at Su Yu.

Su Yu glanced at the giant monster, then at the two little ones behind him, and a string of "MMP" welled up inside him, but he didn't know whether he should say it or not:

"Can someone explain to me how a giant that can withstand an LV8 Disarm Charm was defeated by these first-year wizards?"

"Old Deng, you still dare to say you didn't cheat in secret! I don't believe it, I absolutely don't believe it!"

Actually, this was Su Yu's own fault. He trusted the plot in his mind too much. But if the troll was so easy to deal with, why did Quirrell think it could hold the professors' attention at school?

This also reflects Su Yu's lack of combat experience; for the past 20 years, he has focused his main energy on the study and research of alchemy.

He has participated in very few battles, and even when he did, it was always by using his alchemical tools to overwhelm the enemy with firepower. In other words, he has never fought a tough battle.

Any experienced Auror present would know that trolls have extremely high magic resistance, and the best way to deal with them is to use blunt weapons for physical attacks.

Hermione had just run out of the bathroom, her eyes red, clearly having cried for a long time. She was greatly surprised to see Su Yu and the other two, and asked, "How did you all get here...?"

Before Hermione could finish speaking, she saw the terrifying giant opposite her, roaring at them. When the monster from the book came to life, Hermione was stunned.

The giant on the other side had no intention of letting it go so easily. With its brain the size of a walnut, it had only one thought at this moment: Whoever hurt me, I will eat them!

So the giant slowly turned around, turning its upper body to the side. Just as Su Yu was wondering what it was going to do, the giant suddenly took a step and charged towards the group.

Normally, trolls move very slowly, but they can run. When a troll charges in one direction, it's best not to block its path.

"You three, run!" Su Yu roared. He dared not be careless at this moment. As he spoke, he waved his magic wand and unleashed a spell of Obstacles.

Harry and Ron exchanged a glance after hearing Su Yu's words. Seeing that Hermione seemed a little weak in the knees, they helped her up and turned to run. They decided to leave the trolls to the reliable Professor Su Yu.

The obstacles formed a wall of air in front of the giant, but it was torn apart in less than half a second, and the giant continued its charge.

"Immediately imprison!" A rope flew out, attempting to lock the giant's skull fragment, but snapped with a crack.

"Petrify them all!" A petrification spell struck the giant's shoulder, petrifying a large patch of his skin. However, this did not seem to be an attack; instead, it amplified the giant's impact force.

After several unsuccessful attempts, and with the troll getting closer and closer, Su Yu finally became anxious. In desperation, he pointed his wand at the troll's leg and shouted, "Divine Sharpness!"

This spell, like the "Upside-Down Bell," was taught to Su Yu by Snape when they were in school. Su Yu wasn't very skilled at using it before, but now he was a completely different person.

An invisible blade of air appeared in the air, as if there was a tearing sound. The next moment, a cutting mark appeared on the giant's right knee.

The cut wasn't very deep, but it did cause damage, and you could see the troll's expression turned somewhat painful.

Judging the distance between himself and the giant, Su Yu waved his wand repeatedly, chanting, "Divine Edge Without Shadow! Divine Edge Without Shadow!"

Thanks to Su Yu's improved magical control, almost every Divine Strike landed in the same spot. After about five strikes, the monster's knees finally gave way, its leg bones buckled outwards under its weight and force, and the monster lost its balance and fell forward.

At this moment, the distance between the giant and Su Yu was very close. After the giant charged, its speed was not slow, and its huge body smashed towards Su Yu.

In the critical moment, Su Yu rolled to the right, narrowly avoiding the impact of the giant's body. The giant, carrying enormous kinetic energy, slammed its head into the door frame of the girls' restroom and passed out.

Meanwhile, Harry Potter and Ron were helping Hermione escape from the basement to the first floor when they ran into Professor McGonagall, Professor Flitwick, and Snape, who arrived later.

Professor McGonagall saw the three of them and was furious. She glared at Harry and said, "What the hell are you doing?"

Hermione had already snapped out of her shock. Although she didn't understand the specifics, she knew that her two friends had come specifically to rescue her, and she couldn't let them take the blame.

Before Harry and Meghan could speak, she stood up and said, “It’s my fault. I came looking for the trolls… I thought I could handle them myself. I’ve read about them in books, and I thought I knew them well.”

"If they hadn't found me, I think I would be dead by now... and Professor Su Yu, he's down there dealing with the giant."

"Go back to your dorms immediately! Leave this to us!" Hearing that Su Yu was still fighting the troll, Professor McGonagall didn't waste any words and led the way to the basement.

Seeing the professors walk away, Ron coughed and came to Hermione, saying, "I'm sorry, I was wrong this afternoon. I shouldn't have said that. Also, thank you for taking everything on your own just now."

Harry chimed in, "But Hermione, you don't have to do this. We should share the burden, and besides, we still have Professor Sue, don't we?"

After saying that, the three of them laughed. Instead of going back to the lounge, they rushed back into the basement. They had no choice but to go back to the lounge with so many professors around. How could they leave Su Yu behind and go back to the lounge?

When Professor McGonagall and her two companions arrived at the bathroom door, they saw Su Yu writhing lazily, but thankfully, the troll had already been taken down.

Professor McGonagall stepped forward to help Su Yu up, while Snape checked the troll's condition. When he saw the injury on the troll's knee, his eyes lit up, and he said:

"I never expected that you've made such great progress in magic over the years, besides studying alchemy!"

Su Yu forced a smile: "Hehe, we are the Snake-Eagle Duo, I don't want to be too far behind you."

Snape snorted coldly. He really didn't want to hear the shameful name of the Snake-Hawk Duo again. He didn't know why he was so immature as a child, actually forming a CP with this guy.

"Professor Su Yu, are you alright!" Hermione was the first to run over and give Su Yu a hug, but she was too short and could only hug Su Yu's legs.

Su Yu straightened his back immediately, patted Hermione's head, and said, "It's just a small troll. I can handle it quite easily."

"Is that so?" Snape said sarcastically from the side.

Professor McGonagall then looked at Harry and Ron, her face grim: "Didn't I just tell you to go back to the common room? Why are you still here? For this, I must speak for Gryffindor..."

"Because of your three reckless behavior, I'm deducting 10 points from Gryffindor, 10 points each! Go back to your dorms immediately, the professors will handle this!" Su Yu spoke up before Professor McGonagall could.

Su Yu's actions were obviously intended to boost his Gryffindor enemy achievement, but the Harry trio clearly misunderstood. They thought Su Yu was protecting them to minimize the points he would lose.

Harry winked at Su Yu and said, "Sorry, Professor, we're heading back to our dorms now!"

After saying that, he took Hermione and Ron and left, while the others who remained began to discuss how to deal with the giant.

“Troll snot and blood are excellent ingredients for potion making, so I’ll handle this,” Snape said first.

Su Yu waved his hand: "No, no, this is my spoils of war. The troll's blood and bones are also good for alchemy. Besides, the wooden stick in its hand seems pretty good. I want it!"

Snape frowned and said, "Here's 100 Galleons, half of the troll blood is yours, you can take the club and bones, and everything else is mine. How about it?"

"Hehe, deal!" Su Yu stepped forward and shook hands with Snape.

Chapter 30 The Confident Trio