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

Side Quest: Black Magic Defense for Beginners Completed. You have gained 1 Black Magic and Defense skill point. Keep up the good work!

Is that all? Those two this morning, they were giving gifts and trying their best to perform, but one complained that he hadn't made any progress, and the other thought he was trash.

In the Defense Against the Dark Arts class, I casually offered a small suggestion and demonstrated a minor spell, and the task was completed. Isn't that a bit too magical?

At this moment, when Su Yu looked at Qi Luo again, he suddenly felt that this guy was quite handsome and a good person!

In the following time, Su Yu offered up his dummy wizard as a target for the young wizards, letting them experience what it felt like to cast spells and hit people.

The young wizards were overjoyed. Although the spells were sometimes effective and sometimes not, and some of them didn't even manage to cast a spell at all, they all excitedly roared: Exorcise your weapon!

Professor Quirrell taught two classes today, one in the morning, to Gryffindor and Slytherin students.

As a result, after class, the Gryffindor lions immediately found Hufflepuff and Ravenclaw's little wizards and asked...

"How was it? Defense Against the Dark Arts class? It was so boring, like just reading from a textbook."

To their surprise, Ravenclaw and Hufflepuff's classmates excitedly exclaimed, "No, our Defense Against the Dark Arts class is really interesting! We're using disarming charms to fight dummy figures!"

Huh? It's the same course, and the same people are teaching it, so why is what they're saying different from what we're learning? A big question mark appeared above the heads of the little lions and snakes.

Chapter 16 Su Yu's First Lesson

After the Defense Against the Dark Arts class, Su Yu felt refreshed and had gained an extra skill point. He didn't rush to use it because he had to go to his own class next.

Based on his experience of adding magic points last time, his body would go through an upgrade process. Su Yu wasn't sure how long the process of adding points to black magic and defense would take, and it wouldn't be good if it interfered with his classes.

The Muggle Studies classroom is on the second floor of the castle. There are many Muggle items piled up at the entrance of the classroom, such as televisions, washing machines, bicycles, flashlights, etc., which look very retro.

Su Yu walked into the classroom, where more than a dozen students were already waiting, including the Weasley brothers whom Su Yu knew.

Picking up the student roster, Su Yu called out a name, which felt quite satisfying. During the roll call, Su Yu spotted a familiar face: Cedric Diggory.

Su Yu paid special attention and noticed that although he was only in the third grade, Cedric was already about 1.75 meters tall, tall and strong, with blond hair, and very handsome.

Standing on the podium, Su Yu didn't rush to open the book. Instead, he introduced himself first: "Hello everyone, I am your new Muggle Studies professor. My name is Su Yu."

Before I share my knowledge about Muggles, I'd like to ask you a question: What do you think wizards and Muggles have in common?

George was the first to raise his hand, grinning as he said, "Wizards and Muggles are both human!"

Su Yu nodded, gesturing for George to sit down: "That's right, that's obvious, but that's not what I want to ask."

At this moment, Cedric raised his hand and said, "Wizards and Muggles share the same emotions, such as love, friendship, fear, and so on!"

Su Yu snapped his fingers: "Oh, fantastic! That's very important. Hufflepuff, one point!"

Several other young wizards offered different answers, but none of them were what Su Yu wanted. So Su Yu spoke up:

"In my opinion, the biggest thing that wizards and Muggles have in common is their thirst for knowledge. Wizards thirst for magical knowledge, while Muggles thirst for scientific knowledge."

"I'd like to ask everyone here, who knows what scientific knowledge is!"

A Ravenclaw girl named Trish raised her hand and said, “Professor, I was born into a Muggle family. I know a lot about technology, such as telephones, lights, cars, airplanes, and so on. They are as amazing as magic.”

Su Yu turned around, writing on the black and white paper as he said, "Very good, Ravenclaw gets a point. Let's talk about the telephone first. This thing allows Muggles who are thousands of miles apart to talk directly. Does anyone know what item in the wizarding world can do the same thing?"

“Professor Two-Way Mirror, two-way mirrors can not only make calls, but also let you see the other person!” Fred raised his hand and said.

"Great! Gryffindor, one point added! Does anyone know the cost of a two-way mirror?" Su Yu asked again.

No one spoke up now; the young wizards really didn't know this. Su Yu smiled and said, "Then let me tell you, the market price of a two-way mirror is 250 Galleons, and its cost is at least 180 Galleons, and it takes about a month to make."

Amid the exclamations of the young wizards, Su Yu continued, "But a Muggle phone costs about 100 pounds, which is 20 Galleons. The price will only go lower in the future. So, what do you think of this technology compared to a two-way mirror?"

Cedric, a pure-blood wizard, exclaimed in surprise, "My God! If it only costs 20 Galleons, then almost every wizarding family can afford one, and owls will be out of a job!"

Su Yu was delighted and said, "That's right. Many people here probably know that the Ministry of Magic has a kind of paper airplane that can deliver messages, right? Can anyone tell me the origin of this paper airplane?"

George said, "Professor Sue, I know that. At first, the Ministry of Magic also used owls to communicate, but back then the Ministry of Magic was a mess every day, full of feathers and droppings."

"Later, someone discovered that local Swiss wizards were playing with a kind of origami crane that could fly, so they had a brilliant idea and introduced it to the Ministry of Magic. Later, because the folding of the origami crane was quite complicated, it evolved into the paper airplane we know today."

Su Yu said, "Very good, Gryffindor gets 2 points. Wizards have been using owls to communicate for thousands of years. The Ministry of Magic abandoned owls and switched to paper airplanes, which can be considered an advancement in communication methods."

"But this progress is not significant, because the transmission efficiency of paper airplanes is not actually much higher than that of owls."

"But let's imagine if every commissioner in the Ministry of Magic had a telephone installed, wouldn't their work efficiency improve?"

Su Yu's words made the children below fall into thought. Most of the students in the Muggle Studies class were children from pure-blood wizard families.

Many of their parents worked at the Ministry of Magic and had heard of or seen the work environment there, so they quickly realized that it could indeed increase work efficiency.

In fact, Su Yu had already magically modified the telephone and licensed the patented technology to a company he co-founded with the Stuart family. It is now being widely adopted by the Magical Congress of the United States.

After the children had all reacted, Su Yu continued, "For thousands of years, our magical knowledge system has been constantly improving."

"In ancient times, there were no wands or spells, and only gifted wizards could cast spells. Later, wands and spells appeared, which gave people who were originally unable to cast spells the opportunity to become wizards."

"Later on, we continued to simplify the spell casting steps and optimize the magic nodes, making the spells more and more concise and diverse."

"But similarly, the scientific knowledge system of Muggles is also progressing. From plowing the land by human hands at the beginning, to plowing the land with oxen, and now to plowing the land with tractors, productivity has achieved a great leap."

"In fact, in my opinion, the progress of Muggles is far greater than that of wizards, especially after the Industrial Revolution when Muggles entered the mechanical age."

"In ancient times, Muggles could only fight with swords, which posed almost no threat to adult wizards. Even an entire army could be easily moved by a wizard."

"But now, Muggles have invented guns and cannons. Even experienced wizards can lose their lives if they are not careful when faced with such weapons."

"And as far as I know, the most advanced weapon Muggles currently possess can destroy the entire city of London in a single second, leveling all the people and buildings there."

"In this situation, even a wizard as powerful as Headmaster Dumbledore would probably have to use Apparition to escape."

As soon as Su Yu said this, all the young wizards below, whether from wizarding families or Muggle families, gasped in surprise.

In their view, wizards were far more powerful than Muggles, but what Su Yu was saying completely overturned their understanding.

Cedric was stunned for a long time before stammering, "Professor Su, is everything you're saying true?"

Su Yu smiled, took out a popular science book on human weapons, and said, "Interested students can come and copy a copy to take a look. In the next class, we will talk about Muggle weapons."

Chapter 17 The Hunting Ground for Coal Briquettes

Su Yu's first lesson was a great success, arousing the interest of all the young wizards in the class. Almost all of them copied the book "The Complete Book of Human Weapons" and showed it off to their classmates who had not taken the course.

After class, Su Yu went to the cafeteria to eat something, and then returned to his office. The teacher's office was actually a two-bedroom apartment, with the office serving as the living room and a bedroom on each side.

After closing the door, Su Yu couldn't wait to lie down on the bed and complete the skill point allocation, raising his dark magic and defense to level 4.

The next moment, a huge amount of knowledge was forcefully squeezed into his brain, and a stinging and suffocating feeling came over him, making Su Yu very uncomfortable.

Carefully sensing the changes in his mind and savoring every bit of knowledge flowing into it, the previously obscure and difficult-to-understand black magic and defensive magic gradually became clear.

It took Su Yu about 30 minutes to fully digest and absorb all this knowledge. He felt that he had improved to a higher level regarding black magic and black magic defense.

Without further hesitation, Su Yu allocated two general skill points to Spells and Dark Magic, as well as Defense, raising both skills to LV5.

After another hour of digestion and absorption, Su Yu's progress in black magic and defense was naturally remarkable. He was now able to cast the Guardian Angel spell, which was a beautiful, silver-white raven.

The upgrade of the spell also brought Su Yu a pleasant surprise, because it was not targeted at a single spell, but rather it was effective on all spells.

The knowledge contained within can help Su Yu achieve the goal of making magic take effect faster and be more powerful by using the pronunciation when chanting spells, waving the wand, and guiding magic power.

Alchemy at its current level is sufficient for Su Yu, and no matter how powerful alchemy is, the things created are ultimately external possessions.

With the Dark Lord's resurrection imminent, Su Yu felt that making himself stronger was the only way to ensure his survival.

So Su Yu set himself a small goal: to prioritize leveling up his spellcasting, dark magic, defense, and polymorph skills to LV7.

Moreover, Su Yu could vaguely sense that these skills were actually connected. For example, increasing the total amount of magic power and the control over magic power would help improve all other spells.

The newly acquired knowledge of dark magic also brought new ideas to Su Yu's alchemy, giving him more confidence in breaking through in alchemy on his own.

Looking outside, it was already dark. Just then, Coal Ball jumped onto Su Yu's lap and started meowing.

Su Yu knew that the little one wanted to go out and play, so he patted her head and said, "Okay, okay, I'll take you out now."

Tucked the coal briquettes into his pocket, Su Yu walked out of the office. By now, the young wizards should have already returned to their respective common rooms, and Hogwarts Castle seemed rather empty.

Su Yu went straight to the back gate of the castle and headed towards Hagrid's hut outside the Forbidden Forest.

"Hagrid, are you there?" Su Yu called out loudly.

The door to the hut opened, and Hagrid saw that it was Su Yu. He smiled and said, "Su, come here quickly. I just baked some rock-skin flatbreads. They're still warm. Would you like a piece?"

"Come on, Hagrid. The thing you baked could be used as a shield. I can't bite it." Su Yu retorted mercilessly. He had known Hagrid since school and they had a pretty good relationship.

Hagrid didn't mind and let Su Yu come in first. The hound, Tooth, seemed to have noticed something and barked at Su Yu twice.

Hagrid immediately waved his hand and said, "Tooth, stop messing around, he's my friend!"

Ya Ya had no choice but to shut up, but her eyes were full of vigilance as she lay prone on the ground, maintaining an attack posture.

Hagrid ignored Yaya; his eyes were fixed on the coal ball in Su Yu's arms. He said, "Quick, quick, let go of this little one. She must be very uncomfortable like this."

Seeing Hagrid's anxious look, Su Yu chuckled. He then unhooked the collar from Coal Ball's neck, and the next moment Coal Ball jumped off Su Yu's arms, transforming into a black jaguar over two meters long.

"Roar!" Coal Ball landed and roared at Tooth, who was eyeing it menacingly to the side.

Ya Ya immediately chickened out, rolled over to expose her belly, and made whimpering noises. She even peed a few drops, a condition commonly known as "peeing in fear."

Hagrid completely forgot about Tooth, his eyes filled with fascination, and he exclaimed, "Wow, a pure black cat-leopard, there's probably only one like it in the world, she's so beautiful."

With that, Hagrid opened his locker, took out the leg of some kind of animal, and tossed it to Coalball, saying, "Good girl, come and eat, come and eat!"

Coalball sniffed the leg; it was clearly still quite fresh. Then, it began to chew and tear at it. Seeing that Coalball liked it, Hagrid began to slowly approach her.

For most carnivores, approaching her while she's eating would be extremely dangerous, but for leopard cats, it's the opposite.

Cats and leopards are magical animals born with the ability to read minds. They can completely understand your intentions. You can only approach them if you have no ill intentions when they are eating.

Ancient Native American shamans obtained cat and leopard fur in this way, but no one had ever tamed a cat or leopard, which is why Hagrid and Dumbledore were so surprised when they saw the soot sprite.

Hagrid approached slowly, and Coalball looked up at him. The cat and the human stared at each other, and Coalball easily caught Hagrid's goodwill. So she didn't say anything and continued to eat her meat.

Hagrid finally got to touch Coal's fur, and the silky smooth texture instantly captivated him: "Sue, I really can't imagine that anyone could tame a cat-leopard."

“Hagrid, Coalball needs a hunting ground. Can you designate a piece of land for him in the Forbidden Forest?” Su Yu asked instead of explaining.

Hagrid frowned and complained, "Coal Ball... Sue, to be honest, your taste in names is absolutely terrible. Such a pretty girl, I think she should be called Blackie or Black Girl."

Su Yu had heard far too many complaints about the name "Coal Ball," but this time, he simply couldn't take it anymore: "Hagrid, who gave you the confidence to criticize my taste in naming things? Shouldn't you take a look at the awful name you came up with first?"

Hagrid scratched his head sheepishly and changed the subject, saying, "All the territories in the Forbidden Forest are owned, but with Coalball's strength, no creature can threaten her. However, she should avoid hunting centaurs or other magical creatures, or she'll be in big trouble."