Hogwarts: The Cat Wizard of the Moving Castle.

The sky was filled with purple clouds. In Hogsmeade, in the Shrieking Shack, Mu En pushed the door open and came out. A cold wind blew on his face and made his neck fall back.

He walked along the snowy path towards Hogwarts, and soon he entered the school.

From a distance, he saw several black dots dancing outside the castle, and the sound of the spell was captured early by his pointed ears.

When he got closer, he saw Ron and Draco were fighting fiercely.

But in a moment, accompanied by a disarming spell that seemed to be cast with all his strength, Draco's wand flew high in Ron's direction and pierced straight into the snow.

Draco looked unhappy and rubbed his wrist: "Damn you're lucky, I didn't even do any warm-up exercises."

But his tone was so indifferent, and even though he had an unhappy look on his face, I felt that he didn't mind the failure at all.

As for Ron, he looked at his hands and the wand in his hand in disbelief.

"Ron, you did it!" Neville walked over happily. He was obviously surprised by Ron's result.

Although he was somewhat surprised at Draco's cooking, he didn't think much about it.

"I I won?"

"Don't be too complacent." Draco said coldly, picking up his wand and glancing at him.

"During the duel tournament, I will beat you so hard that you can't even stand up."

Unfortunately, Ron didn't hear what Draco said.

He was still immersed in the joy of victory.

After the morning classes, Harry and Draco sat at the Slytherin table in the Great Hall and talked.

"Your acting is terrible," Harry said.

"Poor?" Draco smiled. "It's enough to fool them. To be honest, if it wasn't for you, I would just beat him up."

"What's the point?" Harry shook his head. "For this kind of small quarrel, we just need to back down a little. And don't forget, this is the quarrel you started."

"Obviously, that guy is just too annoying." Draco used a fork to randomly poke the mushy potatoes on the plate. "But I thought that guy would brag about beating me. At least he used to be that kind of person."

As he spoke, he looked around, observing whether any Slytherin suddenly ran over and said, "Draco, have you really been taught a lesson by that Weasley?" Or whether anyone at the Gryffindor table cast an abnormal look at him.

After some observation, the answer is - no!

"He's definitely different than before," Draco said.

"Yeah," Harry just responded casually.

Suddenly, he caught a glimpse of a dark figure out of the corner of his eye.

When he wanted to look up, the figure had already come close to him.

"Potter!" Snape's deep voice rang out.

"Professor Snape." Harry stood up quickly. Professor Snape didn't look very good.

Is it because of that old book I picked up?

It's not worth much, but if I take it.

Just as he was thinking about it, Snape slowly said, "I remember I once gave you a Christmas homework. It has been half a month since I gave it to you."

"Huh?" Harry looked at Snape in confusion.

"Blood Wolf Potion!" Snape gritted his teeth and warned, "Don't tell me you're just wasting your vacation time having fun."

Suddenly, Harry remembered this incident. It was the potion that Snape gave him at Christmas.

but

"I'm sorry, Professor, I haven't tried brewing that—"

"Sorry?!" Snape looked down at him. As for Potter, he didn't need to hear what he said next. It was just an excuse anyway.

"You'd better hurry up. My patience is limited. Of course, if you say now that you are a loser who knows nothing about potions, I am willing to turn around and leave." Snape said.

"Um, sorry Professor, I'll get to it as soon as possible." Harry said helplessly.

Snape hummed twice with satisfaction after getting the answer, then turned and left, his robe raised high, with swift and decisive movements.

Harry couldn't help but breathe a sigh of relief as he watched Snape disappear into the hall.

Fortunately it's not a big deal.

But for such a small matter, does he really need to come to me specially?

Was he so disgusted with brewing potions for Professor Lupin?

"What does Snape want to talk to you about?" Draco was confused as he listened nearby.

"It's not just one potion. He hopes I can learn it as soon as possible." Harry shook his head helplessly and quickly finished the food on the plate. "I'm leaving. Time waits for no one."

Having said that, he ran upstairs in a hurry.

After Harry left, in the bustling hall, Astoria looked at Draco and whispered, "Mr. Potter didn't notice what happened this morning, did he?"

"Of course not." Draco raised his head: "How could he find out when I'm here?"

"That's good." Astoria let out a long sigh of relief.

At night, on the eighth floor.

Mu En stood in front of the door of the Room of Requirement and tapped with his fingers.

dong dong——

After a moment, with a creaking sound, a little dust fell and the heavy wooden door was opened.

Harry looked at Moon at the door in surprise and turned aside.

"Uncle Mu En, why are you here?"

"Study the Room of Requirement." Mu En answered casually. When he walked into the house, he could see that it was a clean house. There was nothing else except a sealing spell on the door lock.

No, it should be said that there is a box, and it is placed right in the center of this square stone room.

"It looks like you have more than one layer of protection." Mu En praised.

"Yes." Harry nodded repeatedly: "Uncle Moon, if you want to use the Room of Requirement, then I can pack up and leave now. Only one room can be materialized here at a time."

"I know." Moon nodded. Although it was his first time here, he was not surprised by Harry's words.

"I just tried it outside the door. I thought it would banish you to another level, but it didn't. It seems that the most basic first come first served rule applies here."

"Uh" Harry was a little embarrassed.

"Look at your research during this period." Mu En said, "Is this place very unsafe? So much so that you need to add an additional sealing spell and an alarm spell."

"The Alarm Charm is mainly used as a doorbell." Harry explained: "As for the Locking Charm, it is more to prevent others from coming in when I am not here."

Unlike before, he only conducted alchemical experiments based on simple book learning here.

Now, he basically spends most of his spare time here, and the various auxiliary tools he uses for study have also increased accordingly. He can no longer take those things away every time he goes back and forth.

He simply took over one of the countless rooms in the Room of Requirement.

Simple, direct and efficient.

Soon, the two of them came into the box.

This is the box of Little Batty, but the difference is that in addition to the room at the beginning, there is a new door.

As for the furnishings in the room, in addition to the basic long and thick desk and piles of books, there is also a hammock with clothes scattered on it.

Books and draft papers were piled up randomly on the table, and there were quite a few on the ground. In addition to various basic and even advanced magic subjects, there were also books on middle school mathematics, basic biology, etc.

Harry scratched his head embarrassedly, stood between Moon and the pile of clothes, trying to block them.

If Hermione were here and saw this mess, she would probably be very surprised.

After all, this living environment without any aesthetics or dogma is completely different from Harry's outward appearance.

But after she was shocked, she could only helplessly hold her forehead and mutter, "It's the same bloodline."

Of course, Mu En was not aware of this.

"What a mess, ugh." He shook his head in dismay. "What are you going to do without a house-elf to clean it up?"

Harry was a little embarrassed

Uncle Mu En, oh, I am the house-elf of Moonlight Castle, that’s okay.

"Have all the sixth grade books been torn to pieces?" Mu En picked up a tattered old book on the table in surprise, feeling a little confused.

I'm afraid it will take some time to dig deep before it can be turned over.

"Half-Blood Prince" Mu En sighed.

"Oh, right." Harry also remembered: "Uncle Muen, do you know who this person is? This book is an old book I found in the Potions classroom."

Harry had read this book this afternoon and found that this author was really something.

His characters are messy and his words are arrogant.

But his annotations are always to the point, such as the description of the Living Hell Potion in the first chapter of the book's advanced potion making.

The book clearly states that the sleepy beans should be sliced ​​and then added to the potion.

And under the half-blood prince's note, he simply said, "Using the side of a knife to squeeze the beans makes it easier to extract juice than slicing them."

Harry had no idea how this guy came up with such a bold and insightful conclusion about the nature of potions.

Especially, he is a student.

Harry wasn't saying that squeezing with a knife is more likely to release juice than slicing.

Rather, how did this guy called Half-Blood Prince determine that the main required ingredient of sleepy beans in the living hell decoction is the juice, not the bean skin or the bean core and bean sac.

After the juicing process was carried out in advance, because the necessary ingredients for the medicine were efficiently precipitated in advance, the subsequent adjustments to the boiling time and techniques were made. How did this guy achieve perfect optimization?

In theory, each step here requires repeated attempts and a considerable amount of time to try before a conclusion can be reached.

But this guy...it was like he optimized the entire brewing process during the class, and then simply recorded it in the textbook.

"This guy is a Potions genius," said Harry.

"Genius?" Mu En also carefully observed the optimization operations performed by that guy, and began to practice the logical feasibility of the optimization process in his mind.

After a moment, he nodded.

"This guy is really good, but his tone is too arrogant, and this handwriting is really ugly."

As he said this, he put the book down: “This shows that this guy already had an extremely rich foundation in potions when he studied the course at that time.

He knew what chemical reactions would occur when different medicinal properties were combined, and he also knew which different techniques could trigger the various corresponding effects of the potion. Only in this way could he make these adjustments.

But I really don’t know this person, and I haven’t received such ugly handwriting in any of the submissions to the Expo.”

"Okay." Harry nodded and gave up the idea of ​​looking for this talented person.

A guess had already arisen in his mind.

Perhaps this person had died in the first wizarding war launched by Voldemort.

Damn Voldemort, it's a pity for this man called Half-Blood Prince.

unfortunately

"It looks like the room where you brew potions isn't here." Muen put the book down. "This book is very interesting. If you can thoroughly study his ideas for improving potions and the principles behind them, you can easily pass the Hogwarts Potions course with an O grade."

"Okay." Harry nodded repeatedly.

After looking around, Mu En set his sights on the newly appeared door.

"It looks like you've made some bold attempts."

Harry noticed Moon's gaze and nodded repeatedly.

"I read Fantastic Beasts and Where to Find Them, and Mr. Newt Scamander once said that he had a huge ecological box. He traveled all over the world with this box to take in those magical animals that were endangered or whose living environment was not safe. So after getting Barty's box, I wondered if I could expand it into such a box."

"It's very difficult." Mu En nodded: "But it's worth a try."

"Is it very difficult?" Harry looked at Muen in surprise: "The template I preset is like the basement of Moonlight Castle."

"Well, that will be even more difficult." Mu En thought as he pushed open the door, and was greeted by the smell of magic potion and a dull, lingering high temperature.

A new room has been added here, and it looks to be about thirty square meters in size.

There were crudely engraved runes around the walls, and it was obvious that this method came from the "Prophikt Array" he exhibited at the expo.

However, the runes were the modern runes that Harry was most familiar with.

"A new way." He placed his hand on the wall, his eyes ignoring the crucible where the potion was brewing, the frog in the cage that was breathing fire, and the little white mouse living in the water.

Instead, he felt the spatial fluctuations coming from the wall.

"Do you know the difference between the basement and here?" He loosened his hands, and the walls began to tremble gradually, and then the whole room was shaken regularly.

The next moment, a breeze blew.

But in the blink of an eye, before Harry could think of an answer, the whole room became fresh, no longer stuffy, and there was no longer the unpleasant smell of medicine. If you listen carefully, you can even hear the sound of whistling wind.

But when he looked around, trying to catch the source of the wind, he could not find it.