Harry Potter’s Book of Sin

“Found it!” Marx couldn’t help but feel happy to quickly access the information he wanted.

He looked at the contents of the book line by line, silently reading in his heart: "Fairy, Ministry of Magic magic classification: xx, the fairy's hands are holding a branch like wand..."

At noon that day, Marx couldn't wait to open one of the books he ordered, a potion book called Potion. This is an old book published in the 16 century. If he saw it on an old book in Flourish & Blotts, he was estimated to have missed it.

In this potion book, Marx saw a very interesting material - the wings of the fairy.

This is a rather rare potion material, although the fairy does not die because of the loss of wings, but they are naturally willing to let people take their wings.

"...The wings of the fairy have a unique magical nature that allows the fairy to shine when it needs to show off, and also allows the fairy to hide where he needs to hide."

"If you can use this wing as the main material for blending, you might be able to formulate a very special stealth potion." Marx couldn't help but be speculated.

How to make a person invisible, this is a very attractive question. In addition to the intricately crafted invisibility cloak and the difficult Disillusionment Charm, only a few potions can achieve the effect of an adult wizard relatively perfectly hiding its body shape. And these magic potions, without exception, are very expensive - some of their ingredients are quite difficult to find.

This gave Marx the "Why don't you develop a new stealth pot yourself", which seems like some unrealistic ideas.

Although Marx himself knows that he may not be sure, he sees this as an opportunity for self-challenge.

The opportunity is to create it yourself - Marx always thinks so.

"Excuse me, do you know where the books on 'How to cultivate valerian' are placed?" Just as Marx was preparing to put the book in his hand back on the shelf, he suddenly heard a slight voice behind his back.

Because the sound was too light, it made Marx illusion that "maybe I got it wrong." In order to confirm this idea, he went back and confirmed it.

"Hey, what did you say?"

Behind Marx, a young girl, covered in a large Slytherin robes, stood quietly on the front. On her head, she wore a wide-brimmed pointed hat and covered her face for a large part. Marx could only see a pair of pink, delicate lips.

"Excuse me, do you know where the books on 'how to cultivate sedges' are placed?"

The petite young girl repeated the words just mentioned, and the tone of no ups and downs reminded Marx of the Professor Binns who taught A History of Magic.

"Oh, um, Herbology's books should be there." Marx subconsciously pointed to the opposite bookshelf area not far from here.

Bone barely fell, the Slytherin's mysterious young girl immediately turned and walked over there, not even saying "thank you".

"What's the situation?" Marx stared at the back of the young girl, feeling a sense of disregard.

It seems that in the eyes of that young girl, Marx is like a tree on the side of the road, and there is no need to be noticed.

He thought for a moment with his head, at least in his memory, did not find the existence of this mysterious Slytherin young girl.

"Well, forget it. If you have a chance to ask, you will know. It should be the new student of this session?" Marx shook his head and walked to the library area where Potion learned.

Maybe I will come to the library often in the future. He found that the amount of books collected here is really amazing. If you search for it carefully, there will be no small gains.

In the next few days, Marx, in addition to working with other students in the classrooms of various subjects, spent most of his rest in the library on the fifth floor.

Most of the time, students coming to the library can see such a scene -

At a long table near the potion and Herbology bookshelves, one location is always overwhelmed by a large number of books. Those books are either large or small, thin or thick, but most of them are theoretical books that will be borrowed by seniors and even teachers.

The librarian, Madam Pince, usually stares at the location not far away, as if the person sitting there is trying to invade her child, her eyes are sharp and angry.

If you want to figure out who is sitting there, you have to go around to see it clearly, because the book has been completely blocked by the book.

Inadvertently, Marx has become a topical figure among Hogwarts students.

This is not only because of his eye-catching moves in the library, but also because he is the only one after another non-Slytherin student who can say a few words to Snape and is not ridiculed.

In this regard, even Miss Know-it-all, who has excellent grades in the potion class, can't do it.

"That's just because Hermione is a Gryffindor." When Ernie spoke to Marx about the rumor, Marx shook his head and replied.

As a student, Miss Granger is undoubtedly quite good, and Marx has to be sure of her great efforts. But that's the sentence, he doesn't think that this kind of learning method is a suitable choice, especially when you are a wizard.

During this time, the more in-depth study, the more he affirmed this point - magic knowledge is too big and too esoteric. An in-depth study of the discipline of potion alone may exhaust his life.

……

When a person is immersed in something, time is passing very fast. Unconsciously, one week passed by.

During this time, Marx did not meet the mysterious Slytherin young girl again, but his understanding of potion was triumphant.

For those potion books that I ordered, Marx is already fully immersed, and he has a lot of major breakthroughs about the "new stealth potion."

Marx has reached a conclusion about the study of how the wings of the fairy achieve the effect of disappearance. This is a new type of “environmental invisibility” that is different from the “optical stealth” of the invisibility cloak and Disillusionment Charm, as well as several ancient potion formulas – “sensing blocking stealth”.

This is undoubtedly a very effective means of stealth. Although you have not changed objectively, others cannot "feel" your existence.

"But this is really expensive!" Marx slammed on the table with no strength, sighed.

In his calculations, he found that if a wizard is to completely cover up its existence, the amount of wings in the formula must reach a very high value.

"'The wings of the fairy' is an 8Galleon, three copies are 24Galleon; plus other ingredients and catalytic agents, the cost of a finished product is enough for 43Galleon..." Counting here, Marx is sighed again, "It's just robbery." !"

"...wait! Why do I have to worry about this!" Suddenly, Marx suddenly found himself when he found the new continent.

"The library is forbidden!" Madam Pince is hysterically yelled.

"...she doesn't care if she doesn't care." Not far away, a few girls from Ravenclaw whispered there.

Marx apologized to Madama Pince and then sat back in the pile of books.

No doubt, what does a new potion with practical effects mean? This means wealth!

Marx's potion is already cheap enough compared to the rarity and cost of the only few stealth potions available. In the entire magic circle, the price of rare potions has always been high, and the potions grandmaster, such as Snape, which created and improved several precious potion formulas with remarkable effects, is quite popular.

If it weren't for Snape who had too many stories and was not here, it would have been a long time to be a dedicated consultant at a potion producer or aristocratic home.

No money? Since ancient times, which potions grandmaster is really lacking money? As long as the sales channel is carefully selected, it is certainly more than enough for the Gold Galleon not to say that it is rolling in and just supporting him to continue his research. Speaking of trading, this is what Marx is best at.

Early the next morning, he asked Marf to send him a shopping list, and he immediately began to try to prepare the potion. Before this, there are several problems that will be encountered in the actual preparation, which must be solved first.

"笃笃笃"

During the lunch break, Marx first sounded that almost no one would take the initiative to ring, Professor Snape's Potions' Professor office door.

"Who?" is still the gloomy and indifferent tone, so that the visitors feel that they are not welcome by the owner.

"Professor Snape, it's me, Marx McLorne."

"...come in." The voice inside was paused, and this replied.

Marx turned the doorknob to open the dark room of this gloomy Sen, and then walked in quickly.

"Professor Snape, I have a few questions about potion that I want to ask you, I hope I didn't bother you." Marx cautiously worded and made himself as polite as possible.

Snape looked at him with a look of expression, and then with a hint of impatientness: "Ask."

“In fact, I encountered several questions during the study of potion books. For example, regarding the second law of Hilst, what kind of anti-magic reaction will occur in the actual preparation process, so that the original medicinal liquid can continue. Maintain a stable magic power form?” Marx nodded and quickly raised the problem.

"Humph." Snape hearing this not by frowning coldly snorted.