Being at Hogwarts, something's not right with this system.

In fact, the Marrow Cleansing Pill is only a first-grade pill formula. It only allows people who cannot cultivate immortality to have a certain aptitude for cultivation, and allows people who already have the aptitude for cultivation to have even higher aptitude after cleansing their marrow.

Ultimately, however, the Marrow Cleansing Pill is of little significance to cultivators.

Perhaps the formula for the Marrow Cleansing Pill, and the alchemist who can refine it, are very important.

However, the value of the Marrow Cleansing Pill itself, as well as the medicinal materials it requires, is really not high.

Lin Yu had already vaguely sensed that his alchemy might bring a considerable shock to the magical world.

Therefore, he had to have his own considerations.

So in the end, Lin Yu made up some restrictions himself, saying that the Marrow Cleansing Pill could only be made once a year, and that the medicinal materials were very precious and rare.

Anyway, no one knows whether it's true or not, and besides, for the British, the mysterious ancient country of the East is full of fantasy.

No one doubted Lin Yu's excuses.

Moreover, in front of everyone, Lin Yu took out four Marrow Cleansing Pills and gave them to Harry, Ron, and the Weasley twins, reminding them to take them in the restroom.

They had already heard Hermione explain the seriousness of the situation, and disregarding the fact that curfew was approaching, they hurriedly ran to the boys' restroom together.

Fortunately, the men's restroom is on the eighth floor (the women's restroom is on the second floor).

So it took less than half an hour, actually only a dozen minutes.

When the four boys returned, everyone was stunned by the effect.

First, there's Harry, whose body, which was originally thin due to malnutrition, has become much stronger, a phenomenon also seen in Ron.

Although Ron didn't seem malnourished, he was tall and thin, and now he looked much better.

Most importantly, Harry took off his glasses.

Harry has very poor eyesight, but now he no longer needs glasses and can see things clearly.

This also made his emerald green eyes even more beautiful.

And then there are the three Weasley children, whose red hair is even more vibrant and striking, a stark contrast to their older brother Percy.

This made Percy frown slightly, but he quickly relaxed and was happy for his brothers.

(Percy might give up some things for power, but when faced with a choice regarding his family, he would undoubtedly choose his family.)

At the same time, the four girls' skin also became better, which made the Gryffindor girls even more envious.

Actually, this is what girls care about the most.

The boys, however, had a different focus. If it weren't for the curfew, the twins would have dragged Wood out for a ride on a broomstick right then and there.

"Lin Yu, I think I've become smarter!" Ron shouted, taking out his wand and waving it at a chair: "Yugadimur Leviosa."

In front of everyone, Ron, who had not yet mastered the Levitation Charm, easily levitated his chair.

Immediately, the first-graders exclaimed in surprise.

This once again proves the amazing effects of the Marrow Cleansing Pill; it's practically a life-saving miracle.

Everyone surrounded Lin Yu again, staring intently at the last two Marrow Cleansing Pills.

Lin Yu coughed lightly, forcing himself not to criticize Ron, saying, "You didn't become smarter."

He knew what everyone wanted to hear, so Lin Yu didn't stand on ceremony and said directly, "I plan to sell the last two Marrow Cleansing Pills, since I need the money. And I want to say that you shouldn't even think about them, because I'm going to sell them for a very high price; one Marrow Cleansing Pill will cost one thousand Galleons."

Lin Yu's outrageous demands immediately deterred everyone.

After all, Gryffindor is not sorted by bloodline, so only a few pure-blood families would be willing to join Gryffindor.

For example, James Potter, Harry Potter's father, and the Potter family are considered a long-established pure-blood family, although they are not listed as one of the Twenty-Eight Holy Families.

However, the Potter family is one of the three brothers of the Deathly Hallows and the heirs to the Invisibility Cloak.

In this respect, Harry and Voldemort could even be considered to have some kind of kinship, though it's not much anymore.

But thinking about it, it's normal, after all, there are only so many wizards in Britain, and so-called pure-blood families are not many either.

They could also arrange marriages between each other; in fact, Ron and Draco are related.

The main connection between the Weasley and Malfoy families is through the Black family (Sirius Black), who have a familial relationship.

Arthur Weasley's mother was a daughter of the Black family, and Lucius Malfoy's wife was also a daughter of the Black family.

Far away.

In short, the children of Gryffindor are not wealthy.

Comparatively speaking, Slytherin's children are probably quite wealthy, especially Draco Malfoy.

Even Pansy, Parkinson's child and also a member of the Holy Twenty-Eight, was swayed by Draco.

Therefore, Lin Yu felt that instead of messing with Gryffindor, he should mess with more Slytherins.

Anyway, he didn't really value the effects of the Marrow Cleansing Pill; at least to him, it was useless.

Because Lin Yu's price was too high, everyone lost interest in the Marrow Cleansing Pill.

At least for now, they feel that a single Marrow Cleansing Pill is not worth spending a thousand Galleons to buy. That's a thousand Galleons, not a thousand Silver Sickles, and certainly not a thousand Bronze Nats.

Good heavens, they couldn't believe anyone would spend so much money on such a small pill.

The Gryffindor enthusiasm quickly faded, and everyone returned to their respective dormitories to rest.

Wood hesitated as he looked at Lin Yu; he couldn't afford a thousand Galleons either.

Fortunately, including Lin Yu and the twins, three of them had taken the Marrow Cleansing Pill.

(Lin Yu, of course, didn't eat it.)

So Wood stopped worrying about it, but before leaving, he still reminded Lin Yu, "Tomorrow is Saturday, a day off. We're planning to have a Quidditch practice game. Lin Yu, you'll have to participate this time, right?"

Wood was speechless. Apart from listening attentively to the basic Quidditch knowledge lectures on Lin Yu's first day in Quidditch, he hadn't participated in a single training session for a whole week.

He even began to doubt whether Lin Yu really wanted to join Quidditch.

Having already promised Professor McGonagall, Lin Yu finally agreed readily this time, saying, "I understand, I'll be with you then."

Wood finally left, satisfied.

The twins originally wanted to thank Lin Yu properly, especially after hearing that Lin Yu planned to sell the Marrow Cleansing Pill for a thousand Galleons.

Lin Yu, however, said he needed to rest too and ignored the twins' thanks.

After everyone else left, only Lin Yu, Harry, Ron, and Hermione remained in the common rest area.

Ron was about to say something when Harry stopped him.

"Lin Yu, let's go up first," Harry said, pulling Ron up with him.

Finally, only Lin Yu and Hermione remained.