She also saw Felix, and she immediately wanted to leave. But she seemed to thought of something and abruptly remained where she is, though her expression became proud.

Felix stood next to her, "It's rare to have such a serene time at the castle."

She raised her eyebrows in wonder, but quickly regained her composure. She followed Felix's gaze and looked up, a red haze reflected in her eyes.

Neither of them spoke, quietly watching the setting sun's afterglow illuminate the sky in brilliant orange-red colour.

It grew fainter and lighter, and when the last glimmer of light disappeared, twilight fell.

The ghost's silvery-white transparent body also seemed to darken as Lady Grey's gaze went over, her expression mellowed.

"I apologize for my rudeness last time," Felix said..

She tried her best to keep her tone calmer, "No, I was the one who was too sensitive ... I always lose my temper over the smallest things."

The two talked for a few minutes, Felix did not talk anything about the history of Hogwarts, Helena, Rowena Ravenclaw, and Bloody baron, they just simply chatted about the weather, the humans, and the wonder of the world.

"... The Magical Congress of the United States of America - similar to the Ministry of Magic over here - has made at least five relocations of their headquarters, just to avoid the eyes of the public," Felix said.

"Is that so? There was no such organization in the time I lived ..."

"Because the MACUSA was just founded three hundred years ago. Wizards, over there, are very secretive in their activities, and the laws are harsh and very unfriendly to outsiders." Felix introduced, "I think it's because they have come close to exposing the entire wizarding community a few times."

"The most controversial one is the Rappaport law they made at the end of the eighteenth century, a law that states that wizards and ordinary people must be completely segregated and strictly forbids friendship and marriage between them."

Intrigued by this, Ms. Gray asked him for more details.

"A very clichéd opening of a witch falling in love with a handsome muggle, but unfortunately he is the offspring of a purger ..."

Hogwarts grew a little darker, shrouding the figures of Felix and Lady Grey in darkness.

"... Until the end, they couldn't guarantee if they had erased the memories of all the people involved, and to prevent such things from happening, this law came into being."

The story of Felix was over.

Ms. Gray floated off with interest.

...

Felix returned to his office, where he reorganized the important events of the recent past - the

The further conversation with Dobby.

Tossing out the diary and restoring Hagrid's reputation.

The rest were less important, or not time-bound things, such as writing a new book, researching ancient magic, examining the Room of Requirement, making snakeskin soft armour, learning memory magic, etc.

And memory magic ...

Felix became intrigued, and he prepared to attempt again the operation he had once completed.

He tapped his wand on the silver floral inlaid cup in front of him, and in a burst of deformation, it quickly morphed into a small squirrel.

"Well ..."

He then constructed a memory fragment in his brain, and pressed the tip of his wand against his forehead, drawing out wisps of silvery filaments.

The silver filaments floated on top of his palm, emitting silver specks of light around his hand.

Felix carefully incorporates the memory fragments into the squirrel -

Its expression became animated, and the little squirrel lifted its head and stared straight at him.

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

He knew it wouldn't open its mouth because the memory didn't contain the linguistic input, it was merely equivalent to a code word, and the squirrel began to move. It stood on the table and looked around, and soon brought a quill to him in its mouth.

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

"Very good."

He nodded, then watched quietly as he gave this memory two instructions in addition to some habits of the little squirrel that he understood.

At the moment, for example, the little squirrel hid in its big fluffy tail and carefully poked its head out, its black eyes staring at him.

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

Felix waved his wand and made it revert into a cup with a silver pattern.

He fell into thought, the office went quiet.

Half an hour later, he once again had a new inspiration -

Felix whispered, "Expecto Patronum."

The tiny silver rain swallow flew out of his wand and circled around the office, its speed so fast that it left a slim streak in its owner's eyes.

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

'How would it work if I injected some memories into the Patronus?'

That's what Felix thought, and that's what he did, as a memory with the same colour was integrated into rain swallow's body.

In his expectant gaze, rain swallow silently shattered.

It is out of his expectation, why would this happen?

But he quickly thought of the definition of the Patronus: it is a reflection of your most positive emotions of all, the caster must focus on recalling the happiest memories they can think of, and as far as practice goes, the stronger the joy the memories bring, the stronger the effect of the spell.

The keyword used to describe this is 'memory'.

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

Felix shook his head, "I thought I could get a more stable transfiguration structure with the Patronus, by using the temporary incorporation of memories."

According to his vision, the Patronus can act as a messenger, can be separated from the wizard a certain distance by itself, if it is given enough flexible memories, is it not equivalent to a 'other self' that wanders in the outside world?

Whether it was the Patronus magic itself, or the memory fragments injected, it all depended entirely on the Wizard himself, so there was no need to worry about it getting out of control.

Even, according to his vision, the ultimate form of this magic can directly carry his own consciousness, to allow his Patronus to walk around the wizarding world while he is in school, to complete some simple tasks.

For example, gathering information and inquiring news ...

Concerning this aspect, Felix already has certain plan, such as with the help of contract with magic, such as with the help of thinking hut, although now there is no ray of light at all, at least he can work in this direction.

But it all stops at the first step.

One is a pure and happy memories, and the other is a fragment of memory without emotion, which are inherently at odds with each other.

How on earth can he solve this problem?