The ghost also saw Felix, and she wanted to leave immediately. But she seemed to have thought of something, and she stayed there abruptly, but her expression became arrogant.

Felix stood beside her, "It's rare to be so quiet in the castle."

She raised her eyebrows in surprise, but soon regained her composure. She looked up following Felix's gaze, and her eyes reflected the red glow of the sky.

Neither of them spoke, and they watched quietly as the afterglow of the setting sun illuminated the sky with a brilliant orange-red color.

Its light became fainter and fainter, and when the last ray of light disappeared, dusk fell.

The ghost's silver-white transparent body also seemed dim, and Ms. Grey looked over, and her expression softened.

"I'm sorry for my rudeness last time." Felix said.

She tried to keep her tone calm: "No, I'm too sensitive... I always lose my temper over trivial matters."

The two talked for a few minutes. Felix did not talk about any topics related to the history of Hogwarts, Helena, Rowena Ravenclaw and the Bloody Baron. He just simply chatted about the weather, humanities and world wonders.

"...The Magical Congress of the United States of America - similar to the Ministry of Magic here, their headquarters has been moved at least five times, just to avoid the sight of ordinary people." Felix said. "

Really? There was no such organization when I lived in the era..."

"Because the Magical Congress of the United States of America was just established for 300 years. The activities of wizards there are very secretive, the laws are very harsh, and they are very unfriendly to outsiders." Felix introduced, "I think it's because they almost exposed the entire magic world several times."

"The most controversial is the Rappaport Law they enacted at the end of the 18th century. This law stipulates that wizards and ordinary people must be completely isolated, and strictly prohibits them from making friends and marrying each other."

Ms. Grey was very interested in this, and she asked him for more details.

"It's a clichéd opening of a witch falling in love with a handsome Muggle, but unfortunately, he is a descendant of a Purger..."

Hogwarts gradually darkened, shrouding Felix and Ms. Grey in darkness.

"...Until the end, they could not guarantee whether the memories of all the relevant personnel were cancelled. In order to prevent such things from happening, this law was enacted."

Felix finished his story.

Ms. Grey floated away with an unsatisfied look.

...

Felix returned to the office, and he reorganized the important things in the near future -

another conversation with Dobby;

throwing out the diary and restoring Hagrid's reputation;

the rest were some less important or time-limited things, such as writing a new book, studying ancient magic, studying the Room of Requirement, making snakeskin soft armor, learning memory magic, etc.

And memory magic...

Felix became interested, and he was ready to try the operation he had completed again.

He touched the cup inlaid with silver patterns in front of him, and it quickly transformed into a little squirrel in a twist.

"Hmm..."

Then he constructed a memory fragment in his brain, put the tip of the staff against his forehead, and pulled out strands of silver filaments.

The silver filaments floated above his palm, emitting silver light spots that entered and exited the starlight.

Felix carefully integrated the memory fragment into the little squirrel -

its expression became lively, and the little squirrel raised its head and stared at him.

"Do you have anything to say?" Felix asked softly.

He knew it would not speak, because the memory did not contain language information, but this was equivalent to a secret signal, and the little squirrel began to act. It stood on the table and looked around, and soon held a feather pen in front of him.

Felix knocked on the table again, and it quickly ran to the other side of the table, and this time it brought back a piece of parchment.

"Very good."

He nodded, and then watched quietly. In addition to giving this memory two instructions, he also gave some habits of the little squirrel that he understood.

For example, at this moment, the little squirrel hid itself in its furry tail, carefully poked its head out, and stared at him with its black eyes.

After about seven or eight minutes, its expression lost its spirit.

Felix waved his wand and turned it back into a cup with silver patterns.

He fell into thought, and the office was very quiet.

After a while, he had a new inspiration again -

Felix whispered: "Expecto Patronus."

The small silver swift flew out of his wand and circled around the office. It was very fast, leaving a series of slender afterimages in the eyes of its owner.

The hazy silver light made the room beautiful, and finally it landed lightly in front of Felix.

'If I inject part of my memory into the Patronus, what effect will it have? '

Felix thought so, and he did so. A memory of the same color merged into the swift's body.

In his expectant eyes, the swift silently shattered.

This was beyond his expectations. Why did it happen?

But he quickly thought of the description of the Patronus: it is a reflection of all your most positive emotions, and the caster must focus on recalling the happiest memory they can think of, and in practice, the stronger the happiness brought by the memory, the stronger the effect of the spell.

The key to the description is "memory".

The Patronus is made up of happy memories, and Felix just happened to inject a memory, so naturally, the magic dissipated.

Felix shook his head, "I thought I could use the Patronus and the temporarily added memory to obtain a more stable deformation structure."

According to his idea, the Patronus can serve as a tool for sending messages and can be separated from the wizard by a certain distance. If it is given a sufficiently flexible memory, wouldn't it be equivalent to an "other self" wandering in the outside world? Whether it

is the Patronus magic itself or the injected memory fragments, it depends entirely on the wizard himself, so there is no need to worry about it getting out of control.

Even according to his idea, the ultimate form of this magic can directly carry his own consciousness, allowing others to be in school, while his patronus walks in the wizarding world to complete some simple tasks.

For example, collecting information, querying information...

In this regard, Felix already has a certain plan, such as using magic contracts, such as using the mind hut, although there is no shadow now, at least he can work in this direction.

But all this stopped at the first step.

One is a pure and happy memory, and the other is a memory fragment without emotion. The two are inherently conflicting.

How to solve this problem?