Hogwarts: The Cat Wizard of the Moving Castle.

Ever since the last incident, Harry had been looking forward to learning a flying spell or two.

It was not a spell like Professor Snape or other Death Eaters who turned themselves into a wisp of black mist, but a real spell that allowed one to take off freely.

"On the third floor of the Expo Hall, in the third row of the fourth bookshelf from the left, 'Research on Flight.'" Mu En's voice sounded faintly.

"Eh," Harry said, a little embarrassed. "Okay, Uncle Moon, how did you figure that out? Or did you just take the opportunity to test my brain occlumency?"

"Guessed." Mu En answered casually.

He didn't show anything else, so this was the only answer.

"All that I have learned, except for bioalchemy and black magic, is in the museum." He said, "But considering that you may not have time to read, you can come to me and ask which books can help you when you encounter problems."

"Okay." Harry nodded repeatedly.

Muen turned his gaze back and drew out his wand.

Wisps of mist spread out, and guardian gods gradually leaped out from his palms, stepping on the silver mist and spreading out in all directions.

"Don't play foxy girl" He couldn't help but look at a fat cat.

This guy is not honest when he comes out, he goes to catch a fox girl to play with

This thing is like a rat in the wizarding world. It is everywhere, carries a lot of bacteria, and there are so many of them that it is really annoying.

There is even a company in Diagon Alley that specializes in cleaning up vixens.

"Meow~"

The fat cat whined unhappily at the vixen who had run into the cracks between the garbage, then began to sniff and search on the ground.

Seeing this, Harry no longer concealed his intention and drew out his golden snake staff.

"Calling God to Protect——"

A short-haired cat jumped out of the magic wand, surrounded by thick mist, as if it were a real entity.

It was obvious that his Patronus Charm had made great progress.

However, this obviously could not achieve the effect Harry wanted.

Moon, who was high in the sky, noticed this and directed the big cats to search around the wall. If there was any secret door here, they would probably first find the joints on the surrounding walls.

Or maybe a hidden door in the ceiling or floor?

"Try to separate them, to do two things at once, to divide the ability of doing two things at once into spellcasting, and let them [separate] as well." Mu En mentioned it casually, and then his mind sank and he no longer saw the world around him.

He wanted to enter other world levels to observe this place.

Suddenly, the whole world in front of him changed color. The mountains of garbage disappeared before his eyes. The vixens and rats had no biological form, but expressed their existence with a visible [wave].

A variety of smells entered the nose, the smell of stone, wood and... dead frogs. No, to be precise, it should be the frog mummies that have probably been placed here for hundreds of years. The nutrient solution in the jars used for preservation has gradually dried up with the passage of time, and the bacteria inside have all died.

Damn, what kind of garbage is put here

He ignored these messy perceptions and focused his thoughts on the spatial structure itself. Ripples began to spread outward from his brain.

However, nothing was achieved.

The spatial structure here is extremely solid, and there is no such thing as a spatial door that is invisible to the naked eye.

"At least we did some investigation."

By the way, his perception passed through these garbage mountains and explored the ground.

There was no gain either.

After exiting this state, he glanced at the guardians who were investigating and searching, and then he lowered his eyes again.

I saw Harry waving his wand and chanting spells.

However, the guardian god was difficult to form, and it was separated into two groups of mist, which would always disintegrate uncontrollably when they condensed into shape.

He slowly lowered himself and explained, "Don't be obsessed with these things."

"This is a pretty cool technique," Harry explained why he wanted to try it.

At the same time, he did not insist on splitting up the patronus anymore, but simply released a kitten and let it go.

"Is it amazing? It is." Mu En nodded: "But it's not quite what you think. This kind of skill actually doesn't require practice."

"what?"

"Yeah." Mu En sat down casually on a sofa.

“In fact, in most fields, skills are just the most basic things. After mastering the most basic skills, what needs to be improved is cognition and foundation.

When these things are sufficient, the so-called [advanced skills] will naturally be mastered.”

"Is that right?"

"Just like as you grow up, you naturally learn to run." He spread his hands.

"Or to put it another way, the so-called [advanced techniques] that you see now are actually things that people in high positions can do easily.

In fact, no one, including me and Dumbledore, has ever specialized in studying these so-called techniques. These things are just some of the growth in other fields that are involved as the areas we explore become more and more in-depth.

If you go far enough on the path of biological alchemy, your logical thinking ability will surely gradually increase along with your ability to create human alchemical works.

When you look back one day and suddenly want to cast the Patronus Charm, maybe this [advanced technique] will be mastered naturally."

Harry listened to Moon's words, leaning against an old clock, his chin supported by his hand, and lost in thought.

"Uncle Mu En, can I understand this as - concentrating on a certain field?"

"To be precise, it's mutual." Mu En changed his way of saying it.

"If you want to go deeper into a certain field, you will naturally be exposed to other fields, either actively or passively. For example, studying history will inevitably enhance your understanding of society, economics, religion, and philosophy.

Because the world is a whole.

As you study biological alchemy, you will inevitably gradually become proficient in mechanical alchemy, formations, biology, and ancient magic runes. At the same time, your skills in controlling magic power and multitasking will inevitably improve.

It’s all mutual.”

"Then what level can be considered the threshold for [deepening the field]?" Harry asked puzzledly.

"The content of the seventh grade at Hogwarts can only be considered basics." Mu En waved his hand casually and said with a smile: "You don't think that the NETWs advanced class is considered higher education, do you?"

Harry also laughed and shook his head: "If I hadn't seen Uncle Muen take action, I might have thought so."

After hearing this, Mu En thought for a moment, then smiled and nodded.

"Thanks for the compliment."

As he spoke, he suddenly felt a touch in his mind.

"Strange." He stood up.

"what happened?"

"Nothing." Mu En shook his head: "That's the weird thing. Nothing was found."

"Could it be--" Harry was about to speak when suddenly an inexplicable scene flashed before his eyes.

It was like I suddenly fainted.

He shook his head and patted his head.

"What's wrong?" Now it was Mu En's turn to look at him.

"My mind was dazed for a moment just now." Harry said with some doubt. It was a real scene in that instant.

If it were someone else, they might even wonder if they were daydreaming.

However, he felt that there was no reason for him to be absent-minded, and he was not the kind of person who would let his thoughts wander.

Then, a new feeling came to my mind.

"My patronus has gained something!" he said somewhat absurdly.

Uncle Mu En's patronus didn't find anything, but now my patronus actually? ?

"Where is he and what instructions did you give him?" Mu En asked.

Harry was glad that Uncle Moon did not take his words lightly, but asked seriously.

"It's right here." Harry said, taking the lead and leading the way.

After passing a stuffed troll, walking past two garbage hills and following two garbage paths, Harry soon saw his patronus, a short-haired cat.

Its true color should be black like Harry's Animagus, but the Patronus is silver.

"Meow~"

The kitten meowed, motioning for Harry to look in front of him.

An old, blistered cabinet, and on top of it, a pockmarked bust of a wizard with an old, grey wig and something like an old, faded crown.

"what is this?"

However, just as he was wondering, a big hand took the lead.

"Are you kidding me?!" Moon's voice sounded in Harry's ears.

Facing Harry's puzzled gaze, Moon turned his head and stayed on Harry, or the lightning-shaped scar on his head, for a long time.

'Is that the reason?'

"Uncle Moon?" Harry asked puzzledly.

Mu En simply waved the small crown in his hand.

"I didn't expect to be here. It seems that this is the answer given to us by the Room of Requirement," he said.

"This?" Harry looked at Moon's hand. It was a golden crown, but now it was dull and looked like old copper. The crown was very thin and had a gem in the middle. It looked more like a headdress that ladies would wear on important occasions.

Among them, there is a line of barely perceptible small characters.

Harry's fingers tapped lightly on the legs of his glasses, and the scene in front of him began to zoom in and out at will.

"Extraordinary wealth is..." As the small words gradually became clear, his face became full of disbelief.

"This is... Ravenclaw's Diadem?! For thousands of years, it has been like this—"

Harry found this answer difficult to accept.

"Not a thousand years." Mu En shook his head: "It seems that one of Riddle's servants hid him here. How interesting.

Hidden in Hogwarts, according to his habit of giving Horcruxes to servants for safekeeping, he might have given it to Snape, and then Snape put it here, and then the relevant memory was deleted? "

Well, Moon had to admit that this guess was a bit too much of a fool of Dumbledore.

But the fact that this thing can appear here is enough to prove that the old guy is a fool.

Harry looked at the disdainful expression on Moon's face and very subjectively and accurately guessed that Uncle Moon was criticizing Dumbledore.

"But why can my Patronus find it, but yours, Uncle Moon, can't?" Harry asked.

"The answer may be due to the mysterious connection between you and Voldemort," said Moon En.

"What?" Harry was a little confused: "Isn't this the Ravenclaw diadem?"

"Yes, but it is also Voldemort's Horcrux." Moon said as he put on the crown.