"Found it!" Maca couldn't help but be glad that she had quickly found the information she wanted.

He looked at the contents of the book line by line, word by word, and read silently in his heart: "Fairies, the magic part class level: XX, the fairies all hold a wand like a tree branch in their hands......"

At noon that day, Maca eagerly opened one of the books he had ordered, a potions book called The Book of Potions. It was an old book published in the 16th century, and if he hadn't seen it on a list of used books at the Blotts, he would have missed it.

In this potions book, Maca sees an interesting material - the wings of fairies.

This is a rather rare potion material, and although fairies do not die because they lose their wings, they are naturally vain and will never want their wings to be taken away.

“…… Fairy wings have unique magical properties, they can make fairies shine when they need to show off, and they can also allow fairies to hide their tracks when they need to hide. ”

"If you can use this kind of wings as the main material, you may be able to formulate a very special stealth potion." Maca couldn't help but guess.

How to make a person invisible, this is a very fascinating question. With the exception of intricately crafted invisibility cloaks and difficult illusion charms, only a handful of potions can achieve the effect of allowing an adult wizard to hide his body relatively perfectly. And these magic potions, without exception, are very expensive - some of their ingredients are quite difficult to find.

This led Maca to the idea of "why not research a new invisibility potion on your own", which seemed a bit unrealistic.

While Maca himself knew he might not be sure, he saw it as an opportunity to challenge himself.

Opportunity is something you have to create—and Maca has always thought so.

"Excuse me, do you know where the book on 'how to grow valerian' is placed?" Just as Maca was about to put the book back on the shelf, he suddenly heard a slight voice from behind him.

Because the voice was so soft, Maca couldn't help but have the illusion that "maybe she heard it wrong". To confirm this idea, he went back and confirmed.

"Uh, what did you just say?"

Behind Maca, a young girl, tightly covered by a wide Slytherin robe, stood quietly in front of her. On her head, she also wore a wide-brimmed peaked hat that obscured most of her face, and Maca could only see a pair of small pink lips.

"Excuse me, do you know where the book on 'how to grow valerian' is placed?"

The petite girl repeated what she had just said word for word, her tone unalternating to remind Maca of Professor Binns, who taught the history of magic class.

"Uh-hmm, the books on herbology should be over there." Maca subconsciously pointed to the opposite bookshelf area not far from here.

As soon as she finished speaking, the mysterious Slytherin girl immediately turned and walked over there, not even saying "thank you".

"What's the situation?" Maca stared blankly at the girl's back, feeling ignored.

It seems that in the eyes of that girl, Maca is like a tree on the side of the road, an existence that does not need to be noticed.

He tilted his head and thought for a moment, at least in his memory, he didn't find the existence of this enigmatic Slytherin girl.

"Well, forget it, just ask if you have a chance, it looks like it should be a freshman of this year, right?" Maca shook her head and headed for the Potions library.

Maybe he will come to the library more often in the future, and he will find that the collection here is really amazing, and if he searches carefully, he will definitely gain a lot.

In the days that followed, Maca spent most of his rest in the library on the fifth floor, except for the rest of his classmates shuttling between the classrooms of various subjects.

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

At the long reading table near the Potions and Herbology bookshelves, there was a spot that was always overwhelmed with books. The books were big or small, thin or thick, but most of them were theoretical books that only older students and even teachers borrowed.

Mrs. Pince, the librarian, usually stared at the spot not far away, as if the person sitting there was trying to assault her child, with a piercing and angry gaze.

If you want to figure out who's sitting there, you'll have to go around to the back to get a look, because the front is completely blocked by the stacked books.

Inadvertently, Maca has become a talking point among Hogwarts students.

This was not only because of his conspicuous behavior in the library, but also because he was the only non-Slytherin student who could say a few words to Snape without being sneered.

Regarding this, even Miss Jack-of-all-trades, who excelled in Potions class, could not do it.

"That's just because Hermione was a Gryffindor." When Ernie told Maca about the rumor, Maca shook her head and replied.

As a student, Miss Granger was undoubtedly quite good, and Maca had to be acknowledged for the tremendous amount of effort she put into it. But again, he doesn't think this kind of non-rejection method of learning is a suitable choice, especially if you are a wizard.

During this time, the more he studied, the more he affirmed this - the knowledge of magic was too vast and profound. The in-depth study of the subject of Potions alone would probably have consumed the time of his life.

……

When a person is immersed in something, time flies very quickly. Before you know it, a week has flown by.

During this time, Maca did not meet the mysterious Slytherin girl again, but his understanding of Potions grew.

For the potions books he ordered, Maca had already completely eaten them, and he had also made many major breakthroughs about the "new invisibility potion".

Regarding the study of how the wings of fairies achieve the concealment effect, Maca has come to a conclusion. This is a new type of "Optical Invisibility" that is different from the Invisibility Cloak and Illusion Charm, as well as the "Ambient Invisibility" of several ancient potion recipes - "Perception Blocking Stealth".

This is undoubtedly a very effective means of stealth, although you have not objectively changed much, but others cannot "feel" your presence.

"But this thing is so expensive!" Maca leaned limply on the table and sighed heavily.

In his calculations, he found that if a wizard was to completely conceal his existence, the amount of wings in the recipe would have to be very high.

"The 'Wings of the Fairy' is 8 Galleons for one serving, and three for 24 Galleons, and with the other ingredients and catalysts, the cost of a finished bottle is a full 43 Galleons......" At this point, Maca sighed again, "It's a robbery!" ”

“…… Wait a minute! Why do I have to worry about this? Suddenly, Maca stood up as if she had discovered a new world.

"No noise in the library!" Mrs. Pince shouted hysterically.

“…… She didn't care if she was noisy or not. Not far away, a couple of little Ravenclaw girls whispered there.

Maca apologized to Mrs. Pince in embarrassment, and then sat back down in the stack.

Undoubtedly, what does a new potion with practical effects mean? That means wealth!

Compared to the rarity and high price of the only few invisibility potions that exist at the moment, Maca's potion is cheap enough. Rare potions are always high in the wizarding world, and Potions Masters like Snape, who have created and improved several highly effective and valuable potion recipes, are in high demand.

If it weren't for the fact that Snape was involved in too many stories and therefore didn't want to be here, he would have served as an exclusive advisor to some potions maker or nobleman's family.

What's there without money? Since ancient times, which Potions master has really been short of money? As long as the sales channel is carefully selected, it must be more than enough for Jin Gallon not to say that it is rolling in, but to support him to continue his research. Speaking of trading, that's what Maca does best.

Early the next morning, he asked Marfa to send him a shopping list, and he was going to start trying to make the potion at once. Before that, there are several problems that will be encountered in the actual preparation, which must be solved first.

"Tuk Tuk"

During the lunch break, Maca knocked for the first time on the door of Professor Snape's Potions professor's office, which almost no one would actively knock on.

"Who?" It was still the same gloomy and cold tone, which made the visitor feel that he was not welcome at all by the host.

"Professor Snape, it's me, Macka McLean."

“…… In. The voice inside paused, and then replied.

Maca turned the doorknob to open the gloomy and dimly lit room, and walked briskly inside.

"Professor Snape, I have a few questions for you about Potions, and I hope I haven't bothered you." Maca was careful with her words, trying to be as polite as possible.

Snape gave him a blank look, then said with a hint of impatience, "Ask." ”

"In fact, I had a few questions as I studied the Potions books. For example, regarding Heath's Second Law, how do you deal with the demonic disgust reaction that occurs during the actual preparation process in order for the original liquid to continue to maintain a stable magical form? Maca nodded, then quickly asked the question.

"Hmph." Snape frowned when he heard this, and snorted coldly.