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

After consuming a full five hundred spirit stones, Lin Yu finally succeeded in reaching the first level of the Qi Refining stage, and he can now be considered a cultivator.

At the same time, Lin Yu noticed that the spirit stone whose spiritual energy he had absorbed had turned into an ordinary white stone, no longer possessing its previous crystal-clear appearance.

Such spirit stones need to be constantly refined by spiritual energy before they can slowly transform back into spirit stones.

In a fantasy world, you can simply discard spirit stones anywhere, and they will be usable again after a short time.

But this is a world of magic. Lin Yu sighed and could only have the system put the spirit stones away again for now, and then find a place to throw them away later.

The system was speechless; Lin Yu was now using it entirely as a convenient storage space.

Unfortunately, the system felt guilty, and since most of its permissions were now unavailable, it had no choice but to compromise.

Lin Yu did not immediately claim the cultivation reward. He had figured it out. Since it was a cultivation boost of an entire realm, why not wait until it was at its most valuable before claiming it?

For example, when he reaches the ninth level of Qi Refining, wouldn't he be able to directly advance to the Great Perfection of Qi Refining?

Even at the very beginning of the first level of Qi Refining, it already requires 500 low-grade spirit stones.

Heaven knows how many spirit stones will be needed to further improve cultivation.

In short, since he can't improve his cultivation through conventional means in this world, he can only be meticulous and maximize the rewards from missions.

Lin Yu then opened the bathroom door and returned to the stall.

"It's been that long?"

When Lin Yu returned, the three little ones looked up at him in disbelief.

"I thought you were lost and I was just about to go look for you," Harry complained.

Lin Yu rolled his eyes: "Who's so lucky as to get lost just going to the restroom?"

He thought Harry was a bit sarcastic, no wonder the kid spoke Parsley.

That's a bit impolite.

At the same time, Lin Yu noticed that the small table in the cubicle, which was originally empty, was now piled high with all kinds of snacks, almost like a small mountain.

"Why did you buy so much stuff?" Lin Yu asked curiously.

Hermione reminded Lin Yu, "It's already noon."

It turns out Lin Yu had been gone for more than half an hour; no wonder Harry thought he was lost.

The train was scheduled to depart at 11:00 AM sharp, but with Draco causing trouble during that time, it's now past midnight.

Harry scratched his head and explained, "I didn't eat anything this morning, so I bought a lot more. And these things are really cheap, less than two Galleons each. I almost bought the whole shopping cart."

Lin Yu, Ron, and Hermione all rolled their eyes.

Goodness, two Galleons can be exchanged for ten pounds.

This was in 1991, Lin Yu thought. If this were in China, it would definitely be a considerable expense.

Harry, however, was completely oblivious, having just learned that he was actually a small-time millionaire.

So this time when Harry went to school, he carried only Galleons with him.

The sound of that bag of gold coins ringing out was quite crisp and pleasant.

"You're just wasting your money," Lin Yu said sourly. "You'll be living off your savings sooner or later."

Harry shrugged, unconcerned, and said he'd deal with it later.

It's not that Lin Yu is jealous. He's only eleven years old and he has to prepare for the future, even having to help out in the kitchen at the Breaking Cauldron Bar to earn extra money.

Harry, on the other hand, inherited a huge fortune, making him almost as wealthy as Wang Duoyu.

Lin Yu felt increasingly uneasy, so he sat down next to Hermione and unceremoniously reached for a snack on the table and popped it into his mouth.

This is robbing the rich to help the poor; robbing Harry Potter's wealth to help his own poverty.

The next second he spat it out, yelling, "What is this? Isn't this peanut? Why does it taste like pepper?"

Harry and Ron across from them both burst out laughing.

Ron explained, "These are multi-flavored beans, which means they have all sorts of flavors. Yours is pretty good; George said he once ate a bean that tasted like beef jerky from the nose."

Lin Yu grinned, his face full of disgust.

At that moment, Harry handed him a card.

Lin Yu took it and saw that it had a man's face on it, wearing a pair of crescent-shaped glasses, with a crooked long nose, and silver hair and beard hanging down.

There was another line of text written below.

It was the man's name, labeled "Albus Dumbledore".

"Isn't this our headmaster?" Lin Yu flipped the card over and found more information on the back, showing that Dumbledore was the current headmaster of Hogwarts and was recognized as the greatest wizard of his time.

It also records that Dumbledore defeated the famous dark wizard Grindelwald in 1945.

Dumbledore discovered twelve uses for dragon's blood and made great strides in alchemy with his partner Nicolas Flamel.

Lin Yu thought to himself, no wonder Dumbledore was able to get Nicolas Flamel to destroy the Philosopher's Stone and still obtain it.

Harry said to Lin Yu in a curious tone, "Look, Lin Yu, the images on there are moving, and they even leave and come back."

Ron ate a chocolate frog, ignoring the frog's legs kicking around his mouth, but he swallowed it expressionlessly, saying, "You can't expect him to stay there forever."

Hermione was disgusted by Ron's eating habits and said, "This is a magical object. It moves because of magic. But in our world of ordinary people, I mean in the eyes of Muggles, photographs and pictures shouldn't be able to move; they should be frozen in that moment."

Lin Yu glanced at Hermione and thought to himself, "You really are able to integrate into the wizarding world so quickly."

Hermione tossed her hair curiously and asked, "Why are you looking at me like that? Is there something on my face? Or is there something stuck in my hair?"

Lin Yu shook his head and explained, "Do you also call ordinary people 'Muggles'?"

Hermione blinked and stammered, "Muggles just mean ordinary people who can't use magic, right?"

After all, she has read a lot of books, so she probably knows more about these basic facts than Harry, or even Ron?

Lin Yu replied, "Then would you call yourself a Mudblood? After all, your parents are Muggles, and wizards in Muggle families are Mudbloods, right?"

Hermione was startled and stared at Lin Yu with wide eyes.

Lin Yu said dismissively, "My parents are just ordinary people, so don't look at me like that. I know 'Mudblood' is a derogatory term, but 'Muggle' is also a derogatory term. After all, the word originates from the word 'idiot.' So, would you call your parents 'Muggles'? I mean, 'idiots'?"

Lin Yu found it strange. Hermione clearly couldn't accept being called a Mudblood, but how could she casually refer to ordinary people as Muggles?

Hermione opened her mouth, but then fell silent, speechless.

Lin Yu sighed: "It seems that the magic world has been outdated and corrupt for too long. It's time for a revolution."

Since Voldemort was able to rise above others through his immense power, he not only had many followers but also instilled fear in the entire wizarding world.

Lin Yu thought to himself, why can't I?

Voldemort played the pureblood supremacy card.

Then I'll stage a comeback as a mixed-race, mud-blooded individual.

A flame of ambition ignited in Lin Yu's heart, which brought some trouble to his upcoming academy selection ceremony.