Until the next day, Felix was still thinking about this problem.

He had just returned from the Room of Requirement. In this secret room, he tried various methods to make these two unrelated memories get along harmoniously, but all ended in failure.

So Felix turned to study the Room of Requirement. He repeatedly passed by the tapestry of "The Troll Beats the Fool Barnabas" on the eighth floor, silently reciting various needs in his mind.

He had studied this mysterious room earlier, but all for his own needs. Except for the really incredible requests, the conventional requests that conform to the cognition of the magic world could basically be met.

So he planned to test the Room of Requirement from the perspective of others.

Starting with the simple idea of ​​"hiding something", he kept trying various possibilities, and even brought in various professors.

For example -

"I want to enter the place where Severus Snape hides things..."

The result was naturally no response.

It seems that Professor Snape did not have the habit of running around with contraband when he was a student, he thought with some joy.

Felix found joy in this kind of "game" - it gave him a feeling of time and space distortion and a conversation with a young acquaintance. He tried it tirelessly, and this time he anchored the headmaster of Hogwarts -

'The room where Albus Dumbledore hid his things. '

'The room where Albus Dumbledore practiced magic. '

'The luxurious bedroom where Albus Dumbledore slept. '

'The luxurious bathroom used by Albus Dumbledore. '

Felix was about to continue the next topic, but a door suddenly appeared on the wall.

The door opened to the left and right and looked very luxurious, decorated with various golden reliefs and patterns.

"What did I just say?" He was obviously stunned for a moment, then pushed the door open and walked in.

Inside was a very luxurious bathroom, with various exquisite and luxurious chamber pots.

Felix quietly withdrew.

He was hesitating whether to continue, when there was a noise not far away, and in his sight, Trelawney appeared dragging a box.

The sound of glass colliding in the box was very clear in the corridor.

Trelawney was not wearing those mysterious ornaments, but a wrinkled nightgown, and her hair was messily sticking up, looking sloppy.

She also saw Felix.

Trelawney's expression quickly changed from confusion to horror, but she tried to remain calm and said: "It's nice to see you here, Felix, fate has brought us together this morning."

"So you didn't make any preparations and look down on fate's arrangement?" Felix pointed at her outfit and said. Trelawney

retorted angrily: "Don't talk nonsense about fate!"

"Well, besides fate arranging us to meet, what else do you plan to do by the way?" His eyes fell on the box, which contained seven or eight bottles of sherry.

"Oh! I, I think I can hide... place some unused things by the way."

The two fell silent.

Felix felt that she wanted to escape from here very much, and he didn't want to stay any longer, but there was still a question to be clarified.

"You know the Room of Requirement?"

"What? Oh, yes." She said casually, "I use it to store things. To be honest, my office is a little small, and I haven't had a salary increase in these years..."

Felix quickly said goodbye.

After leaving the eighth floor, Felix ran to the auditorium to eat breakfast, and then went to the classroom of the Ancient Magic Rune class on time.

On the way, his thoughts were flying, sometimes thinking about memory magic, and sometimes thinking about the problem of the Room of Requirement.

"Hey, be careful, Miss Lovegood."

He saw a figure walking straight towards him in his peripheral vision, and he avoided it.

It was Luna Lovegood. She was holding a piece of parchment in her hand and reading it attentively, but Felix noticed that the parchment in her hand was upside down.

"It's you, Professor Hepp." She raised her head and looked at him with wide eyes, "Nice to meet you."

"Me too, Miss Lovegood." Felix replied helplessly. This was the second time he heard this sentence from an acquaintance today.

She waved the parchment in her hand: "I'm looking at the rankings, and I won't bump into anyone, don't worry." She said.

Felix was a little choked. He was about to remind the little girl, but now he could only change the subject and ask: "Is there anything interesting?"

"It's really interesting..." Luna showed him the parchment - it was still tilted, she chirped: "From this angle, here," her finger drew an arc on the paper, "put the name of Ravenclaw together, doesn't it look like an eagle?"

"Hmm..." Felix looked at it carefully for half a minute, and he said: "It does look like an eagle."

Luna smiled immediately.

'The little girl with a clear mind is worthy of being a Ravenclaw. '

Felix thought as he watched her back go away.

...

When he stood on the podium, looking at the little wizards in the fourth grade, and was about to start the class, a flash of inspiration suddenly flashed -

he had always had a question, who built the Room of Requirement?

Even he couldn't see through the structure of the entire room, could ordinary wizards do it? But Hogwarts has existed for thousands of years and has cultivated many outstanding wizards. He couldn't say for sure whether such a person existed.

So he gave up this suspicion for a while.

However, he suddenly locked onto a person at this moment, Rowena Ravenclaw.

Could it be that she built the Room of Requirement?

Thinking from this perspective, many things suddenly became clear -

the magic supply of the Room of Requirement was directly built on Hogwarts, and Rowena Ravenclaw was one of the founders of Hogwarts and naturally had this authority;

the Room of Requirement had no fixed form and would constantly change to meet the needs of the person seeking help. It must contain powerful memory magic and transformation magic;

Judging from the manuscript Felix saw, Rowena Ravenclaw did meet this requirement.

Also, among the rumors about the Chamber of Secrets that have been circulating for thousands of years, only Slytherin and Ravenclaw are the most famous. Now that Slytherin's Chamber of Secrets has been found, what about Ravenclaw's?

The young wizards in the audience saw Professor Hep with a smile on his face, as if he was ready to start class, but he suddenly fell silent.

"Teach, professor?" a young wizard asked bravely.

"Oh?" Felix came back to his senses, suppressed his doubts, and said to the young wizards: "Now, let's start today's class..."

"Please turn to page 147."