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

After dinner, several first-year students went out together.

On the way back, Harry took a few cookies out of his pocket and handed them to Lin Yu.

"Hagrid gave this to us, why don't you try it?" Ron said with a wicked grin.

Lin Yu laughed too: "You guys ate some too? Did anyone break a tooth?"

Ron then realized that Lin Yu wouldn't fall for it, because he had already experienced it himself.

Putting aside the taste, the hard crust of the rock-skin cake alone makes its name very fitting.

Harry had no choice but to take back the rock-skinned cakes he hadn't given away. He really didn't think he could finish these snacks with outer layers as hard as rocks.

Well, Hagrid probably thinks they have as many terrible teeth as he does.

Lin Yu couldn't help but complain, "Hey, can you not be so obvious? Do you think I'm a sucker?"

Lin Yu was speechless. Harry's dejected look seemed to suggest a cunning and scheming nature.

If you can't eat it, don't bring it back. You can't eat it yourself, and you want to give it to me?

Lin Yu had discovered more than once that Harry was really cunning and had a sharp tongue. He was really suited for Slytherin, to be honest.

If Harry had met Draco Malfoy first instead of Lin Yu, Lin Yu would never have doubted that Harry might actually join Slytherin.

The premise is that Draco will genuinely care for Harry, and not treat Harry as a tool or want him to be his lackey.

Hermione watched the three boys' childish interaction, shook her head, rolled her eyes, and prepared to walk past them.

"Oh, right, Hermione," Lin Yu suddenly grabbed Hermione.

Hermione blushed, but she didn't break free. Instead, she stopped and looked at Lin Yu, wondering what he was going to do.

Lin Yu looked around, pulled Hermione to the wall, and flipped his wrist to take out a small, bright red pill.

It was the Marrow Cleansing Pill that he had refined that afternoon.

"Would you like one?" Lin Yu kindly asked. "I took one this afternoon, and it worked quite well. Perhaps you don't know what 'cleansing the marrow and removing impurities' means, but in short, this pill can flush out impurities from your body, making your body cleaner."

Hermione looked at Lin Yu with suspicion. Impurities in the body? To make the body cleaner?

What does that mean? Is my body dirty?

You've seen it before you call it dirty?

"But Lin Yu, didn't Professor Snape tell you not to misuse the medicine until he's sure of its effects?" Ron and Harry followed, reminding Lin Yu as they saw the Marrow Cleansing Pill.

Lin Yu glanced at the two children, then said earnestly to Hermione, "Do you trust me? I won't hurt you. This is really a very good thing."

Although Lin Yu didn't know if the spiritual fruits would benefit Hermione, he knew that the Marrow Cleansing Pill only had benefits and no drawbacks.

Even a wizard can improve their health through physical cleansing and marrow purification.

It can't be a bad thing, after all.

And he actually ate one.

Unfortunately, perhaps because Lin Yu has already become a cultivator, or perhaps because he is now a Chaos Dao Body.

The Marrow Cleansing Pill had no effect on him whatsoever.

However, Lin Yu could at least confirm that the Marrow Cleansing Pill had no side effects.

Hermione hesitated but still picked up the Marrow Cleansing Pill from Lin Yu's hand, about to put it in her mouth.

Lin Yu quickly said, "No, listen to my advice, you'd better wait until you're taking a shower tonight, when you go to the bathroom to eat. Trust me, otherwise you'll be very embarrassed."

"Fa Mao Xi Sui" means to expel all impurities from the body.

Just imagine the scene.

Hermione looked at Lin Yu with some doubt, but in the end she chose to listen to his advice and put the Marrow Cleansing Pill into her pocket, intending to take it when she took a bath that night, as Lin Yu had said.

She believed that Lin Yu would not harm her.

after all....

That evening, Hermione went to the girls' bathroom with two other girls from Gryffindor. As she was preparing to take a bath, she took out the Cleansing Pill and swallowed it.

Then the accident happened.

When the three Gryffindor girls returned to the common room, Lavender and Parvati were frantically searching for Lin Yu.

"What's wrong? What's wrong?"

Many Gryffindor students were awakened by the noise and came to the common lounge area, asking in bewilderment what had happened.

"You should take a look at Hermione first," Lavender said, covering her mouth with one hand and pointing at a girl with the other.

She was a dignified and beautiful girl, who was not ugly to begin with, but at this moment she appeared exceptionally dazzling.

She has delicate features, fair skin that is smooth and delicate as if it has no pores, a pair of big eyes that seem to sparkle, and red lips and white teeth, making her look just like a Barbie doll.

And her long, flowing hair, no longer the messy style of the past, made her look like a princess.

"Is that Hermione? Hermione Granger?"

Someone gasped, staring at Hermione in disbelief.

Hermione herself looked completely bewildered; in fact, she had no idea what had happened.

No, that's not right. She actually had a terrible experience. After taking the Marrow Cleansing Pill, a lot of dark, sticky, dirty stuff flowed out of all her pores.

She also had to go to the toilet, and it took her a long time to do so.

They even made a racket in the toilet, like setting off firecrackers.

This made her feel terrible, and she even cried, thinking that Lin Yu really wanted to play a trick on her and make her look bad.

But after she finally got through all the bad things, when she came out of the shower, she found that she had undergone a complete transformation.

Some people even smell a delicate fragrance around Hermione, as if she had become an ethereal fairy.

Hermione was also shocked and incredulous, but she was in a good mood and finally understood why Lin Yu had specifically reminded her when he gave her the Marrow Cleansing Pill.

Good heavens, if she had taken the Marrow Cleansing Pill back then, I wonder what would have happened to her.

Maybe she didn't want to live anymore?

Finally, Lin Yu was called out of bed.

"What's wrong?" Lin Yu looked at the Gryffindor students from various grades in front of him with sleepy eyes. He had received a huge amount of memories earlier, so he was planning to rest early today.

"Lin Yu, look at Hermione, this is Hermione," Parvati said, pulling Hermione to Lin Yu's side.

When Lin Yu saw Hermione's new face, his eyes lit up, but he recognized her immediately and asked, "I know this is Hermione, so what's up?"

"She ate your Marrow Cleansing Pill!" Lavender screamed excitedly.

Lin Yu nodded approvingly and said, "It seems to be working well?"

As Lin Yu spoke, he naturally reached out and gently lifted a strand of Hermione's long hair. Although he didn't mind Hermione's previous messy and unkempt hair, it looked much better now.

Hermione looked at Lin Yu with a slightly flushed face and a smile on her lips, seemingly a little smug.

"I also want the Marrow Cleansing Pill," Lavender and Parvati said in unison, revealing their true purpose.

Lin Yu blinked, then suddenly had a flash of inspiration: "I think I've found a way to make money?"