Unlike the relaxed and curious atmosphere when the young wizards answered questions earlier, the underground classroom suddenly became quiet as Aileen began to speak, as if a professor was lecturing. Every bubbling and boiling sound of the potions around them seemed to be magnified tenfold.

Perhaps due to her experience as a potions assistant for over a year, Aileen unconsciously adopted some of Snape's style when it came to explaining potions – a slightly lowered voice that was still loud enough for everyone to hear clearly.

"Undoubtedly, Felix Felicis is an extremely peculiar potion because it can bring good luck."

Under Slughorn's incredulous gaze, Aileen continued unhurriedly.

"It is said that before the effects of Felix Felicis wear off, everything will be easier to succeed at. However, the brewing process of Felix Felicis is very complicated, and if something goes wrong, the consequences will be unimaginable. But if brewed correctly, it should ultimately appear in a color like molten gold, with large droplets on the surface of the potion, like golden fish jumping non-stop, but without spilling outwards... Is that right? Professor Slughorn?"

"Uh, yes, that's completely correct."

Horace Slughorn opened his mouth, somewhat surprised.

"A perfect answer, there's not much I can add..."

What surprised Slughorn more than Aileen's advanced knowledge was her judgment.

To be able to determine the final form of a potion based on the surface of a still-unbrewed potion was a skill possessed by only a few of the top potion masters in the industry.

Even if Slughorn himself were to answer, he might not be able to do it with such certainty as Aileen.

As for answering correctly by sheer luck?

Potions was unlike other subjects at Hogwarts; the books didn't tell you everything.

Perhaps the effects and forms could be learned through extensive reading, but the specific descriptions inside the cauldron were not found in books.

This meant that Aileen had seen the brewing process of Felix Felicis at least once, and it had to be a successful attempt – and for this to happen to a young witch who had just entered her second year seemed particularly strange.

Unless...

Slughorn frowned, carefully sizing up Aileen, and suddenly his eyes lit up.

"Ah, that's right! 'Hogwarts also has a student who works as a potions assistant and participates in the formulation of a series of regulations.' Severus said something like that. Could the potions assistant he mentioned be you, Miss Kaslana?"

"Yes, Professor," Aileen nodded.

"But only for afternoon potions classes. In this classroom, I'm just an ordinary student."

"I see, I see..."

Slughorn glanced at Aileen with a somewhat greedy look, nodding knowingly.

He suddenly remembered another piece of gossip that Dumbledore had inadvertently revealed earlier. Besides Nicolas Flamel, there was another student at the school who was closely related to another owner of the Philosopher's Stone. If he wasn't mistaken—

"Very good, very good, everyone answered the three questions very well."

Slughorn said with a smile, glancing at Aileen's clothes, "Gryffindor and Slytherin each get ten points, and Ravenclaw gets fifteen points."

Eh?

Ravenclaw?

Aileen was slightly stunned, and subconsciously looked down at her clothes – damn it, in order to achieve the effect of speaking at Ravenclaw, she didn't have time to change her clothes this morning. All her points today would be wasted on the eagles.

Before Aileen could figure out how to explain that she was wearing the wrong clothes, Slughorn continued.

"Now," Slughorn said, "the test is over, and we should start the class!"

After learning a little about the situation of these monstrous geniuses, he didn't plan to continue asking.

As a potions professor, he couldn't wait to see the practical skills of these children. After all, in the past few decades of potions teaching, there had been quite a few young wizards who were eloquent in theory but made mistakes in practice.

For example, Severus Snape, the current potions professor, was not so stable in his performance as a student.

At least compared to Lily Evans, Severus's performance, although good, was always difficult to be as stable, delicate, and outstanding as that Gryffindor Muggle witch. He often made small mistakes in many places.

And in potions, imprecise and non-standard techniques are often the most fatal weaknesses.

"Please turn to page fifty-seven of *Magical Drafts and Potions*. Today we are going to learn a very common primary potion: the Swelling Solution. It will cause obvious swelling of the body's tissues, so you need to be especially careful not to let the potion splash onto your exposed skin during the brewing process."

Horace Slughorn cleared his throat, his voice gradually becoming serious.

"We have a little over an hour, so use this time to brew a Swelling Solution. I know it's not complicated for those of you here, but every potion can be pursued for perfection. The one who completes this potion the fastest and best will earn twenty points for their House and receive a small gift."

At this point, Slughorn winked mysteriously.

"If everything goes well, you can experience a wonderful, perfect day."

The chubby old wizard pointed to the small black cauldron bubbling beside him, the meaning of which was self-evident.

"But... Professor, why only one day?"

Terry Boot asked somewhat eagerly, looking at the golden potion in the cauldron with fiery eyes.

"I mean, why can't we drink it every day?"

"Because, if taken in excess, it can lead to dizziness, recklessness, and dangerous arrogance."

Slughorn said, shrugging helplessly.

"You know, too much of a good thing can be harmful... In potions, it's ridiculous to talk about effects without discussing the dosage. Any potion is very toxic in large doses. But if you take a little occasionally, cautiously, and in moderation..."

"So, have you taken it, sir?" Draco Malfoy asked with great interest.

"I've taken it twice in my life," Slughorn said, "once when I was twenty-four, and once when I was fifty-seven. I took two spoonfuls at breakfast, and those two days were truly perfect."

As he spoke, he stared into the distance in a daze.

Draco thought that whether Slughorn was acting or not, the effect was very tempting.

"Alright, in conclusion..." Slughorn seemed to return to reality and said.

"After this Felix Felicis is brewed successfully, I will prepare a 'twelve-hour' dose of Felix Felicis for the winner of today's class. A full twelve hours, from dawn to dusk, you will have good luck no matter what you do."

"However, I must remind you that Felix Felicis is prohibited from use in organized competitions... such as sports competitions, exams, or elections. Therefore, the person who wins the prize can only use it on ordinary days... and then wait to see how that ordinary day becomes extraordinary! Don't take chances, many professors can tell if you have taken Felix Felicis."

Accompanied by such a blatant temptation, the whole class straightened their backs involuntarily and looked up at Horace Slughorn with focused expressions, even if he added an extremely serious supplement, it did not affect the temptation.

Perhaps in terms of exam results and classroom quizzes, the young wizards led by Aileen have always been in a dominant position.

But in the practical operation of the potions class, the "Moonlight Seven" and Aileen are not completely invincible, at least in the past year, more than once other young wizards have tied with them at the end of the course.

Of course, this is not because Aileen and others have become weaker, or careless.

This is mainly due to the setting of the lower grade potions courses, the upper limit of primary potion brewing is not high.

Under the strict and scientific potions regulations, as long as the young wizards are serious, they can mostly perfectly complete Professor Snape's requirements - fool-style step-by-step guidance, not cumbersome process, basic potion processing... Strictly speaking, the lower grade potions class is not much different from the Muggle's high school chemistry class.

Therefore, when Slughorn proposed a way to win, the students' fighting spirit was almost ignited.

Except for... a certain slightly distracted white-haired ball.

As a lucky person standing on the shoulders of giants, she had paid attention to this legendary potion a long time ago. In the eyes of the Goblin Queen of Gringotts, the expensive and rare Felix Felicis in the wizarding world was not much different from ice coke in her eyes.

Compared to Slughorn, she may have a deeper understanding of the practicality and limitations of this potion.

After all, at the end of the day, Horace Slughorn is just an excellent potions master.

For potions like Felix Felicis, which are precious and have a long cooling-off period, the first-hand information that Slughorn can obtain is actually quite limited, and most of it is only based on feedback he has collected from his own exchanges with a few friends.

In fact, the birth of any potion is the same as the logic of new drug development in the non-magical world.

If there are not enough samples and time to test a potion, then the effect it presents is often just a very one-sided appearance - this is why the progress of potions has been very slow for so many years.

Fortunately, since Nicolas Flamel and Gellert Grindelwald joined her ranks, these are no longer problems.

The former witnessed the erosion of the long river of time, while the latter has the largest sample.

Just as Dumbledore sometimes sighs unconsciously, the civilization and accumulation of thousands of years that the wizarding world has nurtured seems to be specially prepared for Aileen - as countless lines of fate intersect at Hogwarts, the pace of the new era has never been so clear, and Aileen is the luckiest doorkeeper of that era.

"If you are going to deal with some danger beyond your control, Felix Felicis may be of some use..."

Regarding Felix Felicis, Nicolas Flamel once commented, "But in contrast, in addition to those seemingly common potion toxicity, there is actually a very deeply hidden, but particularly harmful price - Felix Felicis will to some extent overdraft your future 'inspiration', or the creativity in your soul."

As an old wizard who has lived for six hundred and sixty-six years, a well-known alchemist, Nicolas feels this deeply.

This lucky potion is not a cost-free gift from an angel, it just concentrates all the 'spark of inspiration' of your future years in one day, constantly blooming and consuming them on those possibly meaningless trivial matters.

Perhaps for mediocre people, this is an indifferent worthwhile deal.

But in the eyes of alchemists like Nicolas Flamel, Felix Felicis is almost one of the most terrible poisons. Although it will not have a bad impact on your life, it will stifle your possibilities for a long time.

As for Grindelwald, this Dark Lord's evaluation of this potion is even simpler.

"Luck? In the face of absolute strength, there is no luck - more than one wizard has naively tried to rely on Felix Felicis to escape my pursuit or challenge me. Guess what their final result was?"

"Success may require a little bit of luck, but more is inevitable."

Aileen glanced at the young wizards behind her who were rubbing their fists, and raised her eyebrows with a playful look.

She didn't plan to spend so much effort to compete for this chicken rib "bad luck potion". On the contrary, if someone really wins today's game with their own strength, then she might need to consider whether to try to save it a little.

For example... acting as the evil campus bully of Hogwarts and robbing the beloved treasures of the little wizards.

Even if the other party is the cutest Hermione Granger, she will not hesitate to attack.

While Aileen was thinking, Slughorn cleared his throat and did not continue to answer and explain questions about Felix Felicis, but went directly back to the podium at the front of the potions classroom, and glanced at the students in the classroom with a serious expression.

"Detailed ingredients and brewing precautions –" Slughorn waved his wand, "– on the blackboard –"

(A detailed list immediately appeared on the blackboard behind the old wizard)

"– Everything you need –" He waved his wand again, his speed of speech becoming more and more confident and steady, seemingly regaining some familiar rhythm, "– in the storage cabinet –"

(The storage cabinet also opened at once)

"Then, let's begin."