The Magical Principles of Natural Philosophy at Hogwarts

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

Because they are already very familiar with the structure of Hogwarts Castle, it can almost be said that it is the same as home, and it does not make any difference whether there is a map or not.

As for the function of displaying people's names, it seemed to them very useless, because usually only Filch, a Squib, would patrol at night, and it was too easy to fool him.And when they walk in the dark, if they want to see the Marauder's Map, they have to light up their wands or let the map itself shine, which is easier to expose.

If they had an invisibility cloak, they wouldn't have to worry about that.

The detection ability of the Marauder's Map is not high, only a basic anti-detection spell can be blocked, and it can only work in Hogwarts, which is another reason why the Weasley brothers think it is not easy to use. 33 Novel Network

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

The map itself does not have too much magical power. It is impossible to monitor the entire castle by itself. It should be just an alternative "monitor" in essence.

And the "host" connected to the display should be the castle itself.

Melanie mentioned to Erwin that Hogwarts Castle can be regarded as a huge alchemy item, which contains a powerful magic circle inside, the most obvious effect is to prohibit wizards from apparating.

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

Essentially she remains a prisoner.

The Marauder's Map can be used as an introduction, and it is possible to find out the reality of Hogwarts Castle by following it. This is the most intuitive embodiment of its value in Erwin's opinion.

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

"Have you seen this thing?" Erwin asked.

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

The vacation is over, and classes are about to start again. Hermione has tried many ways, but still can't get rid of the two distinctive features of cat ears and tail. It is difficult, because if it is not done well, it will easily cause a piece of the robe on the buttocks to bulge out.

After seeing Hermione's new image, Ron couldn't help laughing out loud, and was immediately glared at by Miss Tanuki.

In the first Transfiguration class, Professor McGonagall stared at Hermione for a while, but she didn't say anything immediately, but asked Hermione to come to the office after class.

"Miss Granger, what's the matter with you?" In the office, Professor McGonagall looked straight from behind his glasses.

"What's the matter, Professor?" Hermione pretended to be stupid with a guilty conscience.

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

Unable to hide it now, Hermione blushed instantly.

"that……"

"Are you using Transfiguration indiscriminately, or is someone misleading you?"

Seeing that he couldn't get away with it, if the truth was told that it was the result of the compound soup, it would definitely attract Professor McGonagall's questioning and bring about even more trouble.

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

At the same time, a little pleasure of revenge rose in his heart.

"Erwin?" Professor McGonagall was taken aback.

After 10 minutes, Erwin, who was summoned, walked into the office honestly, and he definitely wanted to listen to what his dean said.

"Give me an explanation?" Professor McGonagall's eyes sparkled with anger, "You deceived Miss Granger, and then used this immature transfiguration on her?"

Erwin didn't answer right away, but first looked at Hermione out of the corner of his eye, and then noticed her pleading eyes.

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

"You should apologize to Miss Granger!" Professor McGonagall said angrily, "It's outrageous, I have repeatedly emphasized that imperfect transfiguration cannot be used on wizards! student."

Erwin listened with low eyebrows, and after he understood that Professor McGonagall was a cold-faced and warm-hearted elder, he didn't intend to contradict her anymore.

"You two, you're getting ten points from Gryffindor each!"

"So much?" Erwin sighed, "It's really cruel of you to deduct your own college points."

"You have the face to say?" Professor McGonagall was even more angry.

Erwin shut up immediately.

In the end, Professor McGonagall did not give a substantive punishment, which made Irwin feel relieved. If he was punished for copying textbooks without magic, it would be too time-consuming.

After a few more reprimands, Erwin was sent away.

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

Professor McGonagall would definitely fix Hermione's anomaly.

As for the deduction of points, can this still be considered a punishment?

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

"It's still a bit difficult for you to recover like this, and you will go to Madam Pomfrey later."

Hermione nodded obediently.

Professor McGonagall seemed hesitant to speak, but he still said it, "I can understand that girls want to change for the person they like, but you really don't have to. It's too dangerous to use Transfiguration indiscriminately. What's more, your age is too early."

"What?" Hermione was a little dazed at first, but felt very shy after realizing it, "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 very confident about your image, but it is not difficult for us as witches to solve it. Now there is a set of rigorously verified methods to improve your external image , but witches need to be talented enough in spells and potions, you must meet the requirements, I am thinking about teaching you now, lest you try unreliable methods..."

Hermione was momentarily stunned.

Professor McGonagall turned his head, with a serious face, "Remember, child, never use magic that has not been confirmed safe and reliable on yourself in the future."

……

During Potions class, Harry felt like he was on pins and needles.

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

He could only pretend to be calm.