Hogwarts: The Cat Wizard of the Moving Castle.

"I have indeed heard of this." Moon nodded, "But due to Professor Binns's health condition, I have not studied it in depth."

"Actually, there is no need for any research." Ms. Grey shook her head, "But you don't have a long enough lifespan to observe the existence of ghosts."

As she spoke, she slowly sat down on the sofa, her posture calm and her tone gentle.

“A ghost is indeed a magical creature, and a Muggle without magic power cannot possibly become a ghost.

In addition, the formation of ghosts must be caused by physical death. There are many ghosts in Hogwarts, but no one has ever died because of the Killing Curse. "

Moon agreed with this statement and thought: "The essence of the Killing Curse is to banish the soul from the world. This is why Riddle was able to keep his soul intact and return to the world to be resurrected after being rebounded by the Killing Curse."

"That's right," Ms. Grey nodded.

"There is another kind that cannot become a ghost either."

As she spoke, a hint of disgust flashed in the depths of her eyes.

"That is, people who commit suicide cannot become ghosts. Except..."

"Except Lord Barrow?"

"Yes." Ms. Grey couldn't help but hold her forehead, expressing her deep distress because of Barrow's existence.

“The existence of ghosts must be due to the unacceptable death during life and the strong desire for it.

My mother once said that both [Ghost] and [Obscure] are products of magic under extreme emotions.

So a ghost is essentially a person who is physically dead, but his will and mind are unwilling to die, so they become entangled and merged with magic power, and then a [ghost body] appears.

This is why ghosts cannot cast magic, but they can rely on their own magical bodies to perform tricks such as passing through walls, passing through bodies, and absorbing the vitality of food.

As for Barrow, he is a suicidal person, but he can also become a ghost.

In general, ghosts are a peculiar product of human beings’ transition from life to death. In the process of transition from life to death, we are meshed with magic and extreme emotions, allowing ourselves to stay in the real world in another body.

But this is not absolute. After all, in history, there have been too many wizards who have been persecuted, but not every wizard can become a ghost."

As she said this, she sighed helplessly.

"I think you understand why."

Mu En nodded but didn't respond.

Barrow is indeed a bit extreme.

After thinking about it, Mu En still felt that he should bring the topic back.

"So you just said you were leaving?"

"That's right." Ms. Grey nodded. "My obsession with existing in this world is gone. The crown has been found, and the knot I had with my mother has also dissipated."

As she said this, she stood up and looked at Harry.

"Moreover, this crown has been handed over to a trustworthy young wizard. If there is anything regrettable, it is that it is a pity that Sir Potter is not a student of Ravenclaw."

"Ms. Grey, thank you for your trust." Harry bowed hurriedly and expressed his gratitude with great trepidation.

"Call me Helena." She smiled gently.

"I have nothing left worth reminiscing about. In fact, if a person really gets a life that is too long and doesn't have the goblin's insensitivity to the passage of time, it would undoubtedly be a torment.

Especially, forever ordinary, and never able to interfere with this world."

"Regarding ghosts, your theories and insights are, I think, important discoveries for the magic world." Mu En said, "I will sort them out soon, if you are willing."

Hearing this, Helena looked at Mu En in disbelief.

"What did you say, Professor Jones?"

Facing the trembling pupils, Mu En repeated his words once again.

She took a deep breath, shifted her gaze, and looked around the entire laboratory aimlessly in panic.

The only thing that was visible was his chest rising and falling due to his emotional state.

After a moment, she turned her back to the two of them.

"Thank you. Thank you so much."

As she said this, she turned her head.

"I have always been in the shadow of my mother. I have always wanted to surpass her wisdom and achievements, so I did all those stupid things afterwards.

I'm sorry to have embarrassed you with this gaffe. What the professor just said means a lot to me, thank you."

As she spoke, she turned around, lifted her skirt with both hands, took a small step back with her left foot, and bent deeply towards Mu En.

"That's not necessary." Mu Enlian said, "Every scholar's achievements and insights should not be buried. I am lucky to be able to talk to you and gain such profound and secret knowledge."

"Thank you." Helena thanked again.

"It's a small matter." Mu En nodded.

"Then I won't bother you, Professor. I roughly estimate that my body will gradually disintegrate in two or three days. During this period, if you have any questions, you can come and communicate with me." Helena said.

Obviously, she attached great importance to her knowledge that was about to be recorded.

"Okay." Mu En nodded, and then Helena said goodbye to the two of them and turned to leave the laboratory.

After confirming that Helena had disappeared, Harry hurriedly came to Moon.

"Uncle Mu En, is everything you said true?"

"Fake." Mu En shook his head.

"Those rubbish [insights] that have no depth and are just spoken without any purpose are not worth recording. They are just polite talk."

Harry nodded, then hesitated for a moment and said, "That's not what I wanted to ask."

"What is that?" Mu En looked at him.

"Well, that knowledge that Miss Helena talked about, is it true?"

"From my experience, it is highly credible, but these may still need to be observed and verified. After confirming these, I will indeed organize them into a volume and leave the name of Helena Ravenclaw."

Harry nodded, then looked a little confused.

"Is this kind of thing important?"

"It is true for many people, especially researchers. For Helena, perhaps because of the influence of her family environment since childhood, this matter means more to her."

“So that’s how it is”

"By the way." Mu En turned around.

"There will be an event about Sir Merlin's Order in May of this year. Scrimgeour told me that he has submitted your name, Hermione's, and Miss Lovegood's. And Neville, he deserves an honor for his work on child trafficking last year."

"Neville really deserves it." Harry smiled, without much emotional fluctuation about his so-called honor.

"Of course, it's better for you to know this matter yourself. After all, Draco Malfoy is a man who can't keep secrets."

"Ok."

Late at night, in Hogwarts.

Harry returned to the common room tiredly, went into the dormitory, then took out the box from under the bed and got into it.

Because of the Ravenclaw laboratory, his box and the laboratory had to be separated, so he had to move the box back to the dormitory again.

The potion was being brewed, it was a deep red color, bubbling with extremely thick liquid.

It matches the potion recipe Professor Snape gave him.

Harry once thought of using the same ideas and methods as the Half-Blood Prince to modify the formula given by Professor Snape.

But it is totally impossible to do so.

Professor Snape's attainments in Potions were so high that Harry now had a hard time matching him.

Afterwards, he completed the homework assigned by other courses, and it was almost two o'clock before he slowly climbed out of the box.

He fell onto the bed exhausted.

Snap——Snap——

When I opened my eyes again, I saw Draco's slapping face.

"It's so rare that I actually get to wake you up." Draco raised the corner of his mouth and showed a disdainful smile: "Tell me, what did you do with Granger yesterday?"

"??"

"Did Professor Snape use your brain to make pig brain potion? Otherwise, why would you say such a thing?"

As he said this, he struggled to move his body and went to the bathroom.

"Okay, then tell me why you fell asleep here? Instead of on the eighth floor."

"Some other research." Harry yawned loudly.

After washing up, Harry and his friends headed upstairs.

Arriving at the auditorium, he suddenly wasn't sleepy at all.

Helena's eyes were fixed on Sindel.

Mu En was holding a steaming cup of coffee and didn't seem to be sleepy at all.

"Then Helena, how similar do you think her current condition is to that of a ghost? In terms of the composition of the soul."

The other little wizards also looked at Helena.

They were Neville, Hermione, Ron and others.

Although they don't understand much, it doesn't stop them from attending the class here.

At least the feeling of knowledge passing through their heads without being retained at all is quite fascinating to them.

A little witch like Hermione, who is very particular about things, was thinking that even if she didn't understand, she had to write it down first.

Helena thought for a moment and then gave the answer.

"Perhaps. This is a process from death to life. However, I want to break free from the shackles of the portrait."

After a moment, she shook her head.

"Maybe it's just magic."

"Magic power." Mu En murmured and began to calculate in his mind. This answer was not what he wanted.

After all, magic comes in many forms, such as earth, water, wind, fire, etc., or in the form of potions, alchemy, and curses.

"The magic of the heart," said Helena.

"Give it to your heart, give it to your emotions and thoughts, or as some wizards say - love. Love is the greatest magic."

"Well, I think I need to think about it for a while." Mu En nodded slightly: "After all, I may not be very good at combining emotions and magic. Especially when it comes to such advanced theories, I will be more inclined to..."

"Logical, conceptual knowledge, or so-called truth?" Helena said.

"That's right." Mu En smiled frankly.

"My mother was once the same as you." Helena smiled and said no more.