In 1905, the German physicist Albert Einstein called time and space together as four-dimensional space-time in "On the Electrodynamics of Moving Bodies", and the trajectory of particles in four-dimensional space-time is the world line.

Later, the concept was further expanded to include the "historical" trajectory of the entire universe.

As a traverser, especially the "butterfly" who has the advantage of foresight, Elena has actually been testing the worldline tightening effect of this world for a long time. (Expand → details)

After all, even when Harry and Hermione use the time turner to travel back in time in the original books, it doesn't seem to really reset history - it's not so much that they change history, but that the world has completed an important point of divergence and intervened to ensure that it ends up.

As Stephen Hawking will make this year, the existence of the "temporal protection conjecture" prevents the generation of closed-class time curves, and those who are in the observation sequence cannot apply the word "occurrence" to the state of affairs between observations, let alone reset the collapsed quantum state.

To put it simply, it is the visitors of the parallel world that can change the world line, and all the actions of the travelers in this world, whether at the mathematical or physical level, are themselves a given trajectory parameters.

"Whew, this world, can't you finally turn back......"

Elena looked up at the faculty chair with a bright look in her eyes.

In fact, for quite some time, she has been worried about the so-called "fatalism" and the "worldline tightening effect", and the easiest way to break it all is to flip the chessboard.

Through her efforts over the past year or so, Hogwarts, the wizarding world, and the entire human world have taken a completely different path from the history of J.K. Rowling's Harry Potter series.

And Elena finally put her mind at ease, under the flapping of the wings of her "little butterfly", even if there is really any restraining force, at this time she has obviously completely given up the struggle and let her dress up at will.

Whether it's the central banked Gringotts Wizarding Bank, the Hogwarts education with the integration of the Magoke, the Demon King Revolutionary Army reborn in the ruins, the Special Containment Procedures Foundation hidden in the shadows...... Even if she suddenly disappears one day, these seeds of thought that have been scattered in various fields will not be extinguished immediately.

However, for Elena, all this is just a puzzle piece of the ticket to a new world.

Under her interference, Grindelwald, Lockhart, Lovegood, Dumbledore, Malfoy, Black, Lupin...... Too many people's lives have changed dramatically without their knowledge, and Elena finally has enough capital to try to lift the fog.

Without the help of God's perspective, creating the future is much harder than changing.

As she expected, Hogwarts City had not been around for a long time before progress stalled due to a lack of energy and computing power, which were not mentioned in the original books.

However, how could the third generation of the Dark Lord be a character who drifted with the flow and hesitated in the fog, the knowledge and vision in Elena's mind were not limited to the plot of one series.

At her behest, at least half of the wizards affiliated with the "Mandate of Heaven" have come to the school as "Hogwarts Physical Training Instructors", and with the assistance of these wizards, several Faraday cages in near-perfect theoretical form are undergoing the first "magic magnetic interference" test.

Hogwarts is surrounded by a strong magical magnetic field that can cause strong interference with electronic devices.

In fact, this phenomenon can be said to be extremely common in places where most wizards gather in the wizarding world, and the previous solution in the wizarding world has been to replace electric power with magic.

For example, the "magic camera" she bought for Luna last year, or the magic-powered "magic radio", or the "magic printing press" of Lovegood's family......

Unfortunately, these are all substitutes for causal inversion.

Wizards didn't really understand the principle, but instead used magic to preserve their appearance and transform it into a magic item with a similar result, the "black box principle".

And if you want to merge the two worlds, then their cause and effect must form a loop with each other.

"One of the best technologies in the former Soviet Union is how to maintain the most basic social order in the event of a nuclear war, and how to prevent the study of civilization from being faulty and stagnant. ”

Elena looked up at the magic candle above the auditorium, thinking in a relaxed mood.

Whether it is a magical civilization or a non-magical civilization that has not yet risen to the level of tampering with the law or rewriting the parameters of the universe, in Hogwarts Castle, classical physics still has extremely tenacious vitality, and natural strong magnetic fields are not uncommon in the academic world of later generations.

On the other hand, electronic devices are not completely ineffective under strong magnetic fields.

According to Elena's previous estimates, as long as she invests some energy to analyze the state of the magical magnetic field around Hogwarts, she should be able to create a device that can be used in this area in less than a month.

What's more, with the blessing of magic, the efficiency of this reverse cracking may become even higher.

After the batch of electric motors, electric heaters, and electromagnetic non-magical industrial artifacts purchased by Douglas were sent to the Hogwarts Research Area, she was able to start cross-testing alternating current and direct current, and on top of that, she could also try to transform magical energy and try to introduce new members to the energy system.

As a minor witch, most of what she can come up with is some very superficial fusion, but through the research of scholars in the former Soviet Union, she can push a new civilized world on top of this integration.

In addition, as more and more heavyweight wizards enter the "Foundation", the magical civilization has finally become less cold, and those magical knowledge that may be lost and sealed has begun to flow and pass on again because of the arrival of these heavyweight wizards.

Hogwarts School of Witchcraft and Wizardry, most likely to become the top magical shrine, is not one of them.

Needless to say, this is also the point that most intrigues Dumbledore and the British Ministry of Magic, especially now that the exchange of the international magical community is beginning to thaw, and this may be the last chance for the center to shuffle.

You know, as the fame of Voldemort and the Death Eaters gradually spread around the world, under the warning of the International Federation of Wizards, the ministries of magic of various countries finally began to face up to this dark wizard - after the identification of many forces, the dangerous magic prop contained in Russia was finally confirmed as a Horcrux.

And this also means that from this moment on, an immortal and immortal terror demon king has appeared in the magic world.

As for the reason why Voldemort appeared in Russia, it is naturally clear at a glance.

Under the analysis of Albus Dumbledore, Newt Scamander, Cornelius Fudge and other wizards who have fought against the Dark Demons, the International Federation of Wizards also agrees with their views.

Whether it's the "V Gold Coin Scam" that nearly brought down the British wizarding world, the imminent Goblin War, the suspicious collapse of the Soviet Union, and the attack on the core shopping street of the Russian wizarding world......

Even the Grindelwald Convening Mark that took place in Salzburg a year ago seems to have the shadow of Voldemort in the latest investigation by Dumbledore and the Austrian Ministry of Magic - he disguised himself as Grindelwald imprisoned in the castle and instigated a war between wizards and Muggle police, but fortunately it was not successful in the end.

Needless to say, Voldemort and the "Death Eaters" tried in vain to destroy the civilized order, emulating or even surpassing Gellert Grindelwald and starting wars all over the world so that order no longer exists.

And what is even more terrifying than the former is that he does not use evil as a means, but as an end in evil.

If it weren't for all sorts of coincidences, Voldemort's previous terrible plans, no matter which one succeeded, would most likely have really caused disaster between the two worlds.

The most immediate effect was that after several days of meetings and consultations, the Ministries of Magic and the International Federation of Wizards established an organization called "SCPF" to investigate and deal with this extremely dangerous transnational "terrorist", and focused on the American wizarding community.

With the "help" of Gilderoy Lockhart, Christopher Ryan, a veteran American Auror, and a group of Russian and American Aurors who participated in the fight against the "Death Eaters" said that they heard Voldemort make a "declaration of crime" very arrogantly before escaping.

His next goal is the United States, and he wants to bring American society to the brink and cause war to break out.

To the shudder of the wizarding conventions of the United States of America and the International Federation of Wizards, the collapse seems to have begun after asking Muggle leaders about the situation in non-magical societies......

And what frightens everyone the most is that until now, they have not been able to find out how Voldemort has silently brought a powerful Muggle nation to the brink of collapse, let alone what he will do next.

In exchange for this, of course, there is an increasingly hysterical investigation, human civilization has been crumbling, and neither the magical world nor the non-magical world wants a third world war, and now the methods and clues to break the situation have been clearly pointed out -

In the American wizarding world, the order is guarded. Or, destroy Voldemort once and for all!

Of course, this also means......

Elena and Hogwarts have been given a precious respite from development.

At least until the U.S. economy recovers completely, those annoying eyes won't leave the U.S. easily.

On the other hand, the most subtle and interesting part is that under the magnifying glass, if the traces of American wizards interfering with the non-magical world are exposed, all the black cauldrons have the best place to go.

......

"Your notoriety is known to everyone from Hogwarts to Ilvermorny......"

In the Great Hall of Hogwarts, Elena gently shook the pomegranate juice in her glass, turned her head to look in the direction of the Slytherin table, and squinted her eyes happily in her heart.

"Dear Senior Riddle, your wish before you died...... I made it happen for you. If one day history is written by me, I will certainly find a way to posthumously crown you an Earl of Glamorgan. ”

"As for now—"

Dinner time was nearing the end, and the young wizards got up and left the auditorium.

Elena, on the other hand, sat quietly at the long Ravenclaw table, not leaving, taking small sips of pomegranate juice in her hand, while waiting patiently for the time to pass.

Seeing that there were fewer and fewer people in the auditorium, Hermione and Hannah, who were sitting at the captain's table of their respective houses in a daze, finally couldn't hold it anymore, exchanged a look with each other, and took the initiative to come over to find the white-haired ball.

Hermione frowned, glanced at the empty Ravenclaw table, and asked softly in anticipation

"Elena, you're ...... tonight"

"If nothing else, it's probably Ravenclaw. ”

Elena replied calmly, smiling before Hermione could finish speaking.

"Luna will light a beacon on the tallest tower, and I'll fly straight back afterward...... Rest assured, I remember the previous agreement, at Gryffindor on Tuesday and Hufflepuff on Thursday. ”

"Hmph, I don't care about that! Who cares where you sleep at night?"

Hermione snorted, glanced at Elena, and spread her hands helplessly.

"Elena, when are we going to the library to read? If you have any other class tasks in the evening, at least Hannah and I can pick you up a little bit...... Road idiot. ”

"I repeat, I'm not a road idiot!"

Elena's little hair flicked excitedly, pausing slightly, her gaze suddenly looked behind Hermione's shoulder, the corners of her mouth slightly raised, and she shrugged her shoulders.

"I really don't need it today, though, because—"

"Oh, Miss Caslana, sorry to keep you waiting, so come with me!"

Before Elena could finish speaking, a hearty voice sounded from behind the girls, and Gilderoy Lockhart strode towards them, her turquoise robe fluttering behind her.

"Professor Dumbledore, and that Mr. 'Wizard' have finished talking, and everyone is waiting for you in the office. Alright, girls, let the trouble go. Please come with me, Miss Caslana—"

"Huh?

Hermione was slightly stunned at first, and subconsciously moved out of the way.

Immediately after, the girl's gaze wandered quickly between Elena and Lockhart, and she finally discovered the source of the sense of incongruity in the previous class, these two people knew each other before!

And, judging from the performance of the dull hair, Elena still seems to be on the dominant side.

But there was no more information and evidence than that, and perhaps Luna Lovegood could have guessed more here, but for Hermione, it was just getting more confused.

"You two ......" Hermione opened her mouth, about to ask something.

"I'm sorry, I can't tell you about this just yet......"

Elena shook her head, stood up and walked past Hermione, whispering in her ear.

"But I can give you a little detail, tonight's content is to write a diary, if you're willing to show me your diary, then I might consider it later-"

Compared to Draco Malfoy, Hermione's situation was much more delicate.

At least until the "School City" takes shape, Elena doesn't plan to expose her to the other side of the world too early, and the most suitable field for Hermione should be the future of magical science, not these unknown darkness.

"Journaling?" Hermione repeated in confusion at Elena's answer.

"That's right, keep a diary. ”

Elena's eyes flickered and she smiled brightly.

"See you tomorrow, Hermione, remember to keep a journal every day after that—"

Perhaps, in the eyes of most young wizards, with the end of dinner, the first day of school is almost over, but in Elena's eyes, everything has just begun!

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Goo, two-in-one chapter, make up for yesterday's broken interest~