Hogwarts: The Cat Wizard of the Moving Castle

"I don't know."

To be precise, Harry didn't know how the basement was constructed.

Moon didn't make it difficult, but explained: "The basement of Moonlight Castle is a small world built completely from the void space. It is like the moon, meshed outside the castle, and the two are closely dependent on each other.

In fact, if someone can break through the wall of the basement, they can find that the outside is exactly what I call the void space, which is where I used the [portal] to expel those Death Eaters before."

Harry clapped his hands and immediately understood the key issue.

"I understand!"

Then, Moon's eyes fell on him.

"According to Miranda Goshawk's "Analysis and Origin of Advanced Spells", the space spells in the current world are explained in detail, and most of them are based on the Traceless Traceless Spell.

And the Traceless Traceless Spell, as the name suggests, is to stretch and enlarge a section of space."

Miranda Goshawk is undoubtedly a top spell master. His series of books "Standard Spells" has always been Professor Flitwick's standard teaching book in spells.

The book Harry mentioned was written specifically for a small number of spell researchers. Its content was obscure and difficult to understand. Even now, he felt like he was chewing a hard bone.

But there were gains.

As for the Traceless Retraction Charm, it could be said that it was the first advanced spell Harry came into contact with when he came into contact with the magical world, that is, the small bag that Gringotts gave them to hold Galleons.

And the ability of the Knight Public Train to pass through the gaps in London is essentially a variation of the Traceless Retraction Charm, which infinitely stretches the space of the gaps to allow the huge public train to rush through.

"This world."

Moon just listened to Harry's narration briefly, and his thoughts stayed on the word he uttered for a moment.

Then he nodded: "Yes, this is the most essential difference between the two."

"The array you are using now has two layers, namely [Support] and [Stabilization].

That is to stabilize an unstable space.

This is completely redundant for this box born from the Traceless Retractable Spell. This is like a tent, it only needs to be supported, no extra layer of wall is needed, useless and puts the entire space into a state of blockade."

"I see." Harry nodded quickly.

"But this operation is worthy of recognition." Mu En nodded. In addition to the magic array on the wall, there is also a new auxiliary array. Obviously, when making bold attempts, this kid did not forget the safety issue.

"I have optimized it. You can study it yourself when you have time." Mu En nodded: "I am actually very curious now, where did you get so many objects from?"

Mu En even saw a golden knife. Although this thing is not as useful as silver in mysticism,

You are quite rich.

"All found here." Harry picked up the golden knife, and there were many crucibles of different sizes and shapes around.

"There is a huge room here, the kind that you can't see the end of at a glance. There are all kinds of things piled up like mountains inside. I think it is the accumulation of various sundries in Hogwarts for thousands of years.

There are a lot of things in it. Usually if I lack something, I will go there first to use the flying spell to find it."

"You can't see the end at a glance." Mu En was a little surprised: "It seems that the structure of this room is better than I imagined."

"I was also surprised. At first I thought that the Room of Requirement was connecting various hidden rooms in Hogwarts with this place, but later I found that it was not the case, or it was composed of a deeper structure." Harry said some of his discoveries.

"Let's take a look." Mu En nodded.

"Okay."

After a moment, the two came to the outside of the eighth floor.

"Uncle Mu En, what do you want to study?"

"I'm just curious about its methods." Mu En explained casually.

Just as the two were talking, the door handle of the Room of Requirement began to gradually disappear, but in the blink of an eye, it disappeared.

"I want."

He thought for a moment and decided to try the Room of Requirement's judgment and recognition of needs.

"I need a room that can withstand my full strength."

After going back and forth three times, Harry saw a familiar round handle in front of him.

"Is there really such a thing?" Mu En raised his eyebrows and opened the door.

What came into view was a room used for duels or spell practice.

Dummies, long tables, and extremely empty midfield space.

Whoosh——

A green arrow shot out from his fingertips, and the next moment, the opposite wall exploded with a loud bang.

It seems not possible.

He shook his head and closed the door.

Obviously, he only detected the "battle needs" that Mu En thought of, and could not perform demand segmentation and identification.

"I need a room that can carry a resting membrane index of 1/100. Forget it. It doesn't make any sense." This idea of ​​a clear unit is unlikely to be recognized.

Although I have a specific concept of the unit in my mind, it is unlikely that this room can be put into practice.

"I need a wide enough space."

This happened three times in a row, and two door handles that Harry was very familiar with appeared on the wall.

Taking two steps back, you can see two huge wooden doors about three or four meters high.

Pushing the door open, a huge room appeared in front of him, with an old sofa, a slowly rotating celestial globe, and a dried potion material storage tank overflowing with foul-smelling black mud.

The fox was flying in the sky, and the ceiling was about twenty feet away from here.

It was taller than the auditorium, and the width was much wider than the auditorium.

Even Mu En saw the small toys he had made in the basement before.

"It seems that the whole Hogwarts has piled up those sundries here." Mu En said.

"Yes." Harry nodded. Every time he saw those things that had caused him a lot of trouble, he had an inexplicable sense of familiarity.

"Strange." Mu En recalled the feedback in his mind just now.

Such a huge space suddenly appeared behind the wall, and the sound it caused was extremely small.

If he hadn't used the resonance of the alchemical runes engraved on his skull to increase the activity of his brain, he might not have been able to detect the appearance of this room at once.

The entire Room of Requirement was actually the same as the one he built in the basement.

The Room of Requirement is the [satellite] of Hogwarts.

And there is more than one.

There are countless satellites. When they feel the need, this gate will become a connection point, connecting the castle with the required room.

Is this the secret room left by Ravenclaw?

After leaving the room, he directly issued the final demand in his mind.

"I need to enter the backstage of the Room of Requirement."

"I need to enter the backstage of the Room of Requirement."

"I need to enter the backstage of the Room of Requirement."

This was repeated three times, and suddenly, the whole wall began to flow, as if a stone was thrown into the calm lake.

"What is this?!"

Harry looked at the wall in surprise, and the next moment, a violent wind came from the wall, as if he was facing the roar of a fire dragon.

"Silence--" Mu En pointed his finger, and the violent whistling wind disappeared immediately.

In the middle of the night, such a huge sound appeared, which was very annoying.

"Uncle Mu En, what did you ask for?!" Harry looked at Mu En in surprise.

"Just some simple requests." Mu En said.

Then, he looked at the wall.

Nothing.

Can you understand my needs, but can't fulfill them for me?

Or, do I not have enough authority?

"I need to enter Rowena Ravenclaw's private study."

After doing this three times, under Harry's nervous gaze, an eagle head statue gradually took shape on the wall.

"Is this. Ravenclaw?!"

Harry had heard that there was a talking eagle head door knocker at the entrance of Ravenclaw's lounge. No matter which college people were from, as long as they answered its questions, they could enter the lounge.

"Password!"

The eagle head had a dark, reflective metallic color, and every feather was vivid and lifelike.

The voice was a light female voice, which seemed more like a child.

Mu En inexplicably felt that this was the voice of Ravenclaw's daughter.

Hmm. An inexplicable intuition.

As for this so-called password.

"Extraordinary intelligence is the greatest wealth of mankind."

"Wrong password!"

Without more words or another chance, the eagle head suddenly disappeared on the wall.

"Isn't it this?!" Harry was also surprised. You know, this is the most famous saying of Ravenclaw, and it also runs through this person.

"After thousands of years, the Ravenclaw we see now may have deviated from the real Ravenclaw." Mu En shook his head and didn't mind it.

"But we may have other ways. Logically speaking, programs that operate with this kind of logic have corresponding loopholes." Mu En said with a smile.

Then, he began to choose words in his mind.

After a moment, he made a decision.

"I need a room that is strongly related to Ravenclaw."

After a moment, a familiar door opened again.

"Sure enough, the Room of Requirement 'remembers' the breath of Ravenclaw!" Mu En explained.

But

the door in front of them, they had just seen it.

Pushing the door open, it was still the familiar messy objects, piles of garbage like mountains and chattering vixens.

"Does this have anything to do with Ravenclaw?!" Harry was very surprised.

"I don't know either." Mu En thought. The Room of Requirement remembered the smell of Ravenclaw, but he couldn't remember it and couldn't follow the smell.

"Will there be Ravenclaw's things here?" Harry fiddled with a worn-out sofa in disbelief.

"A sofa that Ravenclaw sat on? A pen she used?" he muttered.

Mu En raised the corner of his mouth and looked at him helplessly.

"If these garbage mountains have indeed been piled up since the establishment of the school, then it is indeed possible."

As he said, his body gradually floated up and hung high in the air.

Looking around, Mu En immediately found the boundary of this room.

It is estimated to be several football fields in size.

This is actually a very exaggerated data. If it is larger, it can even form a small ecosystem with its own logic, forming a so-called small world.

"Then let me see why this room has a strong correlation with Ravenclaw."