The Magical Principles of Natural Philosophy at Hogwarts

According to the Weasley brothers, the Marauder's Map is no longer of great use to them.

Because they are very familiar with the structure of Hogwarts Castle, it can almost be said that they feel like home. It makes no difference whether they have a map or not.

As for the function of displaying people's names, they think it is useless, because the only one who patrols at night is Filch, a squib, and it is too easy to fool him. And if they want to read the Marauder's Map when walking in the dark,

You have to light the wand or let the map itself shine, which is easier to expose.

If they had an invisibility cloak, they wouldn't have to worry about this problem, but it's a pity that they don't have the ability to obtain treasures of that level.

The priority of the Marauder's Map is not high. It only needs a basic anti-detection spell to block it, and it can only work within Hogwarts. This is another reason why the Weasley brothers think it is difficult to use.

But in Erwin's opinion, there is a high probability that this map hides a big secret.

The map itself does not have very strong magic power. It is impossible to monitor the entire castle by itself. It should essentially be just an alternative "monitor".

The "host" to which the monitor is connected should be the castle itself.

Melanie mentioned to Erwin that Hogwarts Castle can be seen as a huge alchemical object. It contains a powerful magic circle inside, and its most obvious effect is to prevent wizards from apparating.

Melanie was also affected. She told Erwin frankly that the magic script shackles on her body were related to the magic script circle in the castle, which prevented her from leaving the castle for a certain distance.

Essentially she remains a prisoner.

The Marauder's Map can be used as a primer. Following it, it is possible to find out the reality of Hogwarts Castle. This is the most intuitive manifestation of Erwin's view of its value.

"Interesting." Riddle suddenly said when Erwin was looking at the Marauder's Map.

"Have you seen this thing?" Erwin asked.

"No, I just say it's interesting because I haven't seen it before."

The vacation was over and classes were about to start again. Hermione tried many ways, but she still couldn't eliminate the two distinctive features of cat ears and tail. She could only wear a headband and try hard to hide the tail... This was quite difficult.

Yes, because if you don’t do it right, it will easily cause a bulge in the robe on your buttocks.

After Ron saw Hermione's new appearance, he couldn't help but laugh out loud, and immediately received a righteous glare from Miss Tanuki.

In the first Transfiguration class, Professor McGonagall stared at Hermione for a long time, but she did not say anything immediately, but asked Hermione to come to the office after class.

"Miss Granger, what's going on with you?" In the office, Professor McGonagall's serious eyes looked directly at her from behind her glasses.

"What's wrong, Professor?" Hermione pretended to be dumbfounded.

Professor McGonagall didn't say much. She pointed with her wand, and Hermione's hairband fell off, and her two cat ears immediately stood up.

Now she couldn't hide it anymore, and Hermione's face immediately turned red.

"that……"

"Are you using transfiguration indiscriminately, or has someone misled you?"

Seeing that he couldn't be fooled, if he told the truth that it was the result of the Polyjuice Potion, it would inevitably lead to Professor McGonagall's questioning and even greater trouble.

Hermione's heart skipped a beat, "It's Erwin." She said simply.

At the same time, a small sense of revenge arose in my heart.

"Erwin?" Professor McGonagall was stunned.

Valley

Ten minutes later, Erwin walked into the office honestly after receiving the summons. He must have listened to what his dean said.

"Give me an explanation?" Professor McGonagall's eyes sparkled with anger, "Did you deceive Miss Granger and then use this immature transformation technique on her?"

Erwin did not answer immediately, but first looked at Hermione with his peripheral vision, and then noticed her pleading eyes.

He immediately admitted his mistake and said, "I'm sorry, Professor."

"You should apologize to Miss Granger!" Professor McGonagall said angrily: "It's really outrageous. I have repeatedly emphasized that imperfect transfiguration cannot be used on wizards! You all turned a deaf ear, and you are still from my own college.

student."

Erwin listened with a low eyebrow. After understanding that Professor McGonagall was a cold-faced and warm-hearted elder, he no longer planned to contradict her.

"You two have deducted ten points from Gryffindor each!"

"So much?" Erwin sighed, "You are really ruthless in deducting points from your own college, Professor."

"You have the nerve to say that?" Professor McGonagall became even more angry.

Erwin shut up immediately.

In the end, Professor McGonagall did not give a substantial punishment, which made Erwin relieved. If he was punished by copying textbooks without using magic, it would be too time-consuming.

After a few more scoldings, Erwin was sent away.

When he walked out of the office, he had a relaxed expression. Although Professor McGonagall was angry, it meant that there was no need to worry about the aftermath of the Polyjuice Potion incident.

Professor McGonagall will definitely solve Hermione's anomaly.

As for deducting points, can this still be considered a penalty?

At this time, in the office, Professor McGonagall, who was facing Hermione alone, softened her expression.

"It's still difficult for you to recover like this. You'll have to go find Madam Pomfrey later."

Hermione nodded obediently.

Professor McGonagall seemed hesitant to speak, but she still said it, "I can understand girls wanting to make changes for the people they like, but you really don't have to do that. It's too dangerous to use transfiguration indiscriminately.

, not to mention that you are a little too early at your age."

"What?" Hermione was a little confused at first, but felt shy after reacting, "You misunderstood, we are not..."

"I know, I know." Professor McGonagall reassured her, but Hermione's explanation didn't seem to have the desired effect.

She stood up and walked to the bookshelf behind her, "I know you may not be confident about your image, but this is not difficult for us as witches to solve. Now there is a set of rigorously verified methods for improving your external image.

Method, but it requires that the witch has sufficient talent in spells and potions. You must meet the requirements. I am thinking that I should start teaching you now to prevent you from trying unreliable methods randomly..."

Hermione was stunned for a moment.

Professor McGonagall turned around with a serious look on her face, "Remember, kid, never use magic on yourself in the future that has not been confirmed to be safe and reliable."

…

During Potions class, Harry felt on pins and needles.

He always felt that Snape's eyes were on him, and he seemed to already know what they had done. Harry felt very guilty because they had left too many loopholes.

He could only pretend to be calm.