The next morning, news of Professor McGonagall's class being reviewed spread throughout the breakfast table.

Students were curiously inquiring about details everywhere, but besides the location and time, no one knew more information.

Everyone guessed that the prefects might know more, but when Hannah repeated for the third time that she didn't know and started clenching her fists, the nosy little wizards finally believed that Hannah was also unclear about the details. The only thing people knew was that this time, those arriving at Hogwarts to participate in the review weren't just officials from the British Ministry of Magic.

"So, our mission is to stand outside the door? To prevent students from going in and causing trouble?"

Hannah's gaze wandered back and forth between Hermione and Eileen, as if trying to discern something from their faces.

"While the professors and officials are having a meeting inside, we'll stand at the door like stone sentries, waiting until the review meeting is completely over?"

"Uh, actually, there's an inner field and an outer field—"

Eileen shrugged and said cautiously.

"You and Luna will maintain the outer field, and you don't have to stand at the door. There will be chairs, registration tables, and such..."

"And Eileen and Hermione can sit comfortably inside and observe, right?"

Luna said softly, with a hint of resentment, glancing at Eileen and Hermione, "Will there be shifts or rotations between the inner and outer fields?"

"Well, probably... Okay... Of course, there will be..."

Under the gaze offensive of Luna and Hannah, Eileen compromised helplessly.

"If you can convince other students to take over, I can ask Bill Weasley on the upper-year side."

"No problem, I can ask Ginny, Danilova, and them!"

Hannah's eyes lit up, and she answered quickly.

The Witch Club has been established for so long, and now there's finally something to order them to do!

So, by that evening, the four little witches were waiting neatly in front of the Transfiguration classroom ahead of time.

Ginny and Bill were responsible for registration and order maintenance in the outer field. Danilova and Irina patrolled the corridors, fulfilling their duties as trainee prefects.

A moment later, a chaotic sound of footsteps came from the other end of the corridor.

Professor McGonagall and dozens of adult wizards poured in from the door of the Transfiguration classroom.

Umbridge trailed at the end of the line, whispering something to Madam Bones, the Head of the Department of Magical Law Enforcement.

"Well, let's begin as soon as possible, everyone—"

When the last wizard walked into the classroom, Professor McGonagall waved her hand and closed the teacher's door.

This was not an interrogation, but merely an academic review to determine whether "New Transfiguration" complied with magical teaching standards.

She had done something similar not long ago in the lecture hall of an off-campus research institute, so she didn't feel much nervousness or unease.

"The birth of the New Transfiguration theory is essentially to answer the exceptions in Gamp's Law of Elemental Transfiguration..."

Professor McGonagall surveyed the people in the classroom, pulled out her wand, and tapped the blackboard.

As she explained, magical writing gradually unfolded on the blackboard.

Apart from a few Ministry of Magic officials, most of the wizards present were experts in the field of Transfiguration.

Therefore, Professor McGonagall could skip many basic contents and start directly from the specific theoretical changes.

She spoke for about a quarter of an hour, and everyone listened attentively, the room silent.

She explained that in years of teaching, she had found that the stability and success rate of Transfiguration were greatly affected by the caster's mental model. After months of teaching experiments, Professor McGonagall was now 100% certain that clarifying the framework, weight, and hardness of the target object would save a lot of magical power consumption.

She also talked about how she had carefully studied the five exceptions of Gamp's Law of Elemental Transfiguration, trying to find similar patterns in them. At first, she thought those exceptions should be independent and non-interfering special cases, but the appearance of Nicolas Flamel and Apocalyps disrupted her previous understanding—the purpose of alchemy is to fundamentally transform new substances, which is very similar to the state of Transfiguration, but different. So she began to wonder if Transfiguration was another kind of magical logic...

"Very good," the editor-in-chief of *Transfiguration Today* nodded thoughtfully as she paused, "So, Transfiguration and alchemy are two kinds of magic."

"I have to remind you that if this view is extended, it is no longer Transfiguration. But if it's not Transfiguration... then what is it?"

"Concept coverage—or information coverage."

Professor McGonagall continued, her voice a little hoarse from constantly talking.

However, the gleam in her eyes grew brighter and brighter, as if someone had lit two magical torches in her eyes.

She began to explain the relevant theories about the composition of the world and the breakdown of information, raising the question of whether something looks like an apple and smells like an apple...

But then, Professor McGonagall's voice became hesitant.

The more Transfiguration is studied, the easier it is to encounter problems, and the most difficult to overcome is the area of chemical properties and chemical reactions.

In fact, she had only just touched on these contents in the past few months, and it was difficult to explain them thoroughly in such a short time.

Classical Transfiguration theory ends at the level of object transformation, and no one has ever paid attention to the more subtle and distant transformations in the chemical field:

Wizards don't have much concept of chemical reactions, even alchemy is more based on long-term experience summaries.

And with the arrival of those Muggle scholars, a road that no one had explored before was quietly unfolding in front of McGonagall.

"Some Scientific Magic," this was Dahlia's previous way of referring to it.

Human eyes, and even the magic of wizards, cannot truly see those subtle electrons and atoms that are too small to describe.

Professor McGonagall thought seriously, if it involved the control of Transfiguration in the field of chemical reactions, how should she explain it... How should she prove to others that there are tiny things in this world that are countless times smaller than dust, and that when they come into contact and collide, they produce wonderful changes, which in turn affect the stability of Transfiguration.

She subconsciously shifted her gaze to "Professor Apocalyps" sitting in the front row. When it came to the field of alchemy, he should know more than she did.

Professor Apocalyps smiled slightly, as if he had guessed her troubles, and suddenly said.

"Further content, those are your own research topics, aren't they?"

Grindelwald grinned and said, "I think your explanation is about enough here, after all, we are only discussing the scope of students' learning today."

"Alchemical Transfiguration—this has been a problem for more than a dozen centuries, and I've only just scratched the surface. You don't need to be too anxious."

Professor McGonagall breathed a sigh of relief, a big, relieved sigh, and showed a grateful smile.

Although Dumbledore was temporarily missing, at critical moments, Professor Apocalyps would share the pressure for her, just like Dumbledore.

"Wh-what... Alchemical Transfiguration? I don't understand—"

Just then, a middle-aged wizard with a receding hairline said in a puzzled voice, "Didn't you just spend time arguing that Transfiguration and alchemy are two..."

"Transfiguration, alchemy, Alchemical Transfiguration, Transfigurational Alchemy... these are actually four disciplines."

Professor McGonagall said quickly, tapping the blackboard lightly with her wand.

"The former two are basic magical disciplines, and the latter are composite disciplines, or some ideas that have not yet been formally established."

"Alchemical Transfiguration is based on alchemical principles and techniques, studying the properties and behaviors of Transfiguration systems, and discovering and establishing branches of special Transfiguration laws."

"Similarly, Transfigurational Alchemy is the reverse. With the development of magical theory, I think the situation of interdisciplinary penetration will become more common."

What Professor McGonagall didn't say was that this concept actually came from the prompts of those Muggle scholars—in the non-magical world, chemistry and physics, two seemingly distinct disciplines, not only intersect and have things in common in some basic fields, but also re-entangle as they go further up, just like two spiraling lines. And Transfiguration and alchemy are the "physics" and "chemistry" of the magical world. Apart from the name and some different contents, the essential uses are actually the same.

Wizards... a means of understanding and interpreting the truth of the world, that's all. This is Professor McGonagall's biggest gain these days.

Amelia Bones looked at the words appearing on the blackboard and suddenly remembered some proposals from the Ministry some time ago, nodding thoughtfully.

"I can roughly understand," she said softly, "In fact, the future of the magical world may be like this, with collaboration and integration across fields."

She turned around, looked at the wizards around her, and a hint of brilliance flashed in her monocle as she continued to explain.

"The Ministry of Magic is preparing to promote industrial magic supplies, standardized magical creature industries, and assembly-line production of basic potions..."

"But what I don't understand is, I heard that you are promoting some Muggle teaching. How are these contents related to what you just said?"

"Muggle... teaching content?" Mr. Fields, the editor-in-chief of *Transfiguration Today*, frowned.

"That's right, I have evidence here that Minerva McGonagall is taking this opportunity to teach students Muggle knowledge in Transfiguration class."

Umbridge, sitting in the middle row, suddenly stood up, took out a thick writing board from her handbag, and shook it triumphantly.

"In the important classes where students should be learning magic, she treats those poor little fellows as if she were teaching Muggles."

"Listen to this, scientific Transfiguration—tsk, tsk, that doesn't work at Hogwarts, does it?"

"Science, not technology, Ms. Umbridge."

Professor McGonagall replied calmly, glancing at her with some pity.

"Science is a systematic way of analyzing the world and finding patterns."

"As for the content I teach to students, yes... a considerable part of it comes from knowledge from the non-magical world."

"However, is it possible that we and Muggles actually live in the same world? The properties of objects, weight, basic physical laws..."

"If you had listened carefully to my explanation of New Transfiguration just now, and understood it, you would know that these are exactly what we lack."

Professor McGonagall had obviously prepared a lot of answers in advance, and before Umbridge could finish two questions, she replied quickly like a string of beads.

Of course, Umbridge was not completely unprepared either.

"Oh, then let's skip that. Is the source of Muggle knowledge you use in class reliable?"

Umbridge asked sharply, her pale, toad-like face staring at Professor McGonagall's direction.

As the "former" Senior Undersecretary to the Minister for Magic, Umbridge knew all kinds of rules and regulations too well.

"How do you confirm that these contents are suitable for wizards to learn, rather than the absurd guesses about the world that Muggles foolishly and one-sidedly make?"

"I cited Muggle textbooks and verified that the content is true and reliable..."

"You verified? That might not work—"

Umbridge opened her mouth, revealing the tiny teeth inside.

"Whether the theory of the non-magical world is reliable cannot be directly decided by you alone."

"Then let's establish a teaching and thesis qualification review association, how about that?"

At this moment, Grindelwald, who was sitting in the front, suddenly spoke, and he glanced at the other wizards in the room.

"I very much agree with Ms. Umbridge's point of view. The citation of teaching content cannot be taken lightly. We should form an academic alliance to identify the content."

"As for our early work, let's start with the non-magical literature submitted by Professor McGonagall—as long as they are true and reliable, not baseless, and not reproducible, we will recognize that they have the value of reference and use, while the teaching goals in class are a separate matter."

"...Verify, the source of content?" The editor-in-chief of *Transfiguration Today* nodded lightly, "Wonderful."

"The Department of Magical Law Enforcement can endorse this matter—"

Amelia Bones coughed softly, "The final review results can be summarized here, and we will give them official citation qualifications."

"So, Professor McGonagall, please sort out your non-magical knowledge, as well as the source of the literature and the specific content."

"We will organize a joint review by wizards from all aspects as soon as possible to identify whether there are unreliable and absurd parts in those contents."

"No problem."

Professor McGonagall smiled and nodded, then turned to look at Umbridge.

"Oh. You see, this little problem should be solved..."

"Is there anything else you want me to answer?"

"Of, of course—"

Umbridge's face turned red and white, quickly flipping through the writing board in her hand, her eyes moving on it.

"Your theory has not been published in a formal occasion and does not have the recognized influence of the magical society."

"I plan to publish them in *Transfiguration Today* and *Walking into Magic* one after another."

"There are no magic textbooks on the market that meet the new theory, you—"

"The new textbook is being written, and I am the first author."

Professor McGonagall replied unhurriedly, her eyes becoming more and more strange.

She suddenly didn't understand, Umbridge... wouldn't she be—actually—a helper standing on their side?

All the questions were almost all the contents that Eileen had once troubled and asked her.

In the following time, the question and answer between Umbridge and McGonagall became more and more intense and rapid.

Under the observation of a group of top wizards and Ministry of Magic officials in the field of Transfiguration, the two asked and answered, which was exceptionally wonderful.

"The Ministry of Magic may have unpredictable consequences of the new and old theories in the Ordinary Wizarding Level exams and the Advanced Ordinary Wizarding Level exams."

"New Transfiguration can perfectly achieve all the original teaching goals, the only problem is the written exam."

"That written exam will make the students—"

"Outdated theories should naturally not appear on the test paper. I suggest modifying the written test paper."

"It's not up to you to say, Professor McGonagall."

"Well, but the educational institutions and academic review committees of the International Confederation of Wizards should be qualified to complete this change."

"So before everything is settled, you still can't..."

"No problem, I will temporarily stop teaching activities, and Professor Black will accept the corresponding magic teaching."

"You..."

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Yay! Missing population returns! Big chapter!!