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

Although Lin Yu had clearly offended Draco, and he also knew that the brat loved to tattle, that meant Lucius would find out about it sooner or later.

By then, the entire Malfoy family will be his potential enemies.

Even Lucius, that uncivilized old man, might personally make things difficult for Lin Yu and give him a hard time.

But Lin Yu didn't take it to heart.

Because the system reward has already been issued.

"I need to use the restroom," Lin Yu said. Instead of sitting back down next to Hermione, he walked out of the stall and quickly went to the train connection to find the restroom.

The bathroom was empty at the time. Lin Yu pushed the door open and went in, then turned around and locked the door from the inside.

Then, Lin Yu contacted the system in his mind: "System, I want to claim my reward."

The system's voice rang in his mind: "Five hundred low-grade spirit stones have been distributed to the system space. The host can retrieve them at any time."

The system also kindly told Lin Yu, "Spirit stones are a special type of ore. Because they contain spiritual energy, they can be used as currency between cultivators, as materials, or by directly absorbing the spiritual energy within them to improve one's cultivation. Moreover, spirit stones are divided into low-grade, medium-grade, high-grade, and top-grade according to the amount of spiritual energy they contain. The higher the grade, the more and purer the spiritual energy within the spirit stone."

According to the system's annotations, the spiritual energy in a low-grade spirit stone is equivalent to one day's cultivation of an ordinary cultivator at the first level of the Qi Refining stage.

A mid-grade spirit stone contains ten times the amount of a low-grade spirit stone.

A high-grade spirit stone is worth a hundred times more than a mid-grade spirit stone.

Top-grade spirit stones are even more extraordinary, being ten thousand times more valuable than high-grade spirit stones.

Therefore, the higher the grade of a spirit stone, the more precious and valuable it becomes.

Lin Yu nodded secretly, but then felt puzzled: "What's the point of telling me all this? This is a magical world, and I can't get spirit stones. So just give me the cultivation reward first."

The system suddenly sighed for some reason and reminded you, "The cultivation reward is the first level of the Qi Refining stage. Are you sure you want to claim it now?"

Lin Yu was about to agree, but he wasn't stupid. As if he finally understood, he said, "You mean I can first collect the spirit stones, then improve my cultivation by absorbing the spiritual energy within them, and then collect the reward for directly increasing my cultivation level once my realm is higher?"

Yes, the cultivation reward directly raises Lin Yu's cultivation level by one realm. If he accepts it now, it will only make him a first-level Qi Refining cultivator.

But what if he uses spirit stones to raise his cultivation to the first level of the Qi Refining stage? Then he can directly advance to the second level of the Qi Refining stage.

Furthermore, if Lin Yu is currently at the ninth level of the Qi Refining stage, wouldn't he be able to directly reach the Great Perfection of the Qi Refining stage?

The book "How is Spiritual Qi Cultivated?" included in the beginner's gift pack is actually a foundational text on cultivation, teaching basic knowledge such as the division of cultivation realms.

Therefore, Lin Yu naturally knew about the division of cultivation realms.

Simply put, the cultivation realms, from lowest to highest, are: Qi Refining Stage, Foundation Establishment Stage, Golden Core Stage, Nascent Soul Stage, Deity Transformation Stage, Void Refining Stage, Body Integration Stage, Mahayana Stage, and Tribulation Transcending Stage. Moreover, each major realm is further divided into ten minor realms.

That is, the tenth level of the Qi Refining stage is the Great Perfection, the tenth level of the Foundation Establishment stage is the Great Perfection, the tenth level of the Golden Core stage is also the Great Perfection, and so on.

The cultivation realms are basically the same as those in many cultivation novels that Lin Yu read in his previous life.

The difference is that the ultimate level of his cultivation system is the Tribulation Transcending stage, and once he successfully transcends the tribulation, he can ascend to immortality in broad daylight.

Of course, if one fails to transcend the tribulation, then one can only perish and disappear.

In addition, if Lin Yu could cultivate immortality, he would gain an increase in lifespan with each realm he reached.

For example, if the average lifespan of an ordinary person is generally one hundred years.

So, the Qi Refining stage can reach 150 years old, the Foundation Establishment stage is 200 years old, the Golden Core stage is 500 years old, and the Nascent Soul stage is 1,000 years old.

The higher one's cultivation level, the longer one's lifespan. Not to mention that after ascending to immortality, one is said to live as long as the heavens, even the Great Ascension stage alone can grant a lifespan of 20,000 years.

It can be seen.

Lin Yu naturally wanted to cultivate, just for that terrifying vitality, but unfortunately he couldn't improve his cultivation through ordinary means.

That's why he cares so much about the reward for this mission, even if it means falling out with the Malfoys.

After receiving some reminders from the system, Lin Yu stopped rushing to claim the reward for advancing his cultivation level and instead claimed 500 low-grade spirit stones first.

Suddenly, a pile of small stones fell out of nowhere in front of Lin Yu.

Each spirit stone was the size of his fist, and looked crystal clear, like jade.

There were a full five hundred spirit stones, almost filling the entire bathroom. Fortunately, none of the spirit stones fell into the toilet bowl.

Because it's too big?

Lin Yu discovered that his legs were buried under spirit stones, so he had to pull them out with great effort and sit directly on the pile of spirit stones.

He closed his eyes, focused his mind, and silently practiced the Devouring Heaven Divine Art, which he had already memorized thoroughly.

In fact, this wasn't the first time he had tried to circulate the cultivation technique; he just hadn't been able to get the hang of it before.

Now, sitting atop a pile of spirit stones, as he circulated his cultivation technique, he felt as if he were immersed in a magical and unique environment.

Whether it was an illusion or not, Lin Yu felt that the air around him had become warmer, and at the same time, he felt relaxed and clear.

Gradually, wisps of energy entered Lin Yu's body, entering through the pores and acupoints all over his body, circulating through his meridians, and finally converging into his dantian.

Lin Yu's dantian was originally empty, but now it has begun to gather spiritual energy, gradually forming a ball of energy.

Lin Yu was secretly delighted. He had succeeded; Daoist Master had finally succeeded.

He couldn't help but be excited. He had thought that there was no hope of cultivating immortality, but now he actually had a chance.

If one could become an immortal, who would miss such an opportunity?

It's because he didn't have the opportunity that Lin Yu acted so disdainful of cultivating immortality.

Lin Yu calmed down and continued to circulate his cultivation technique to absorb the spiritual energy from the spirit stone beneath him.

Although low-grade spirit stones contain little spiritual energy and are not as pure.

However, because of the large quantity and Lin Yu's low cultivation level, the amount of spiritual energy he absorbed was still considerable.

Lin Yu cultivated for an unknown amount of time, until he realized that he could no longer draw any spiritual energy from the pile of spirit stones beneath him. Only then did he slowly open his eyes, ending his first cultivation session. He said in a complex tone, "I've only barely reached the first level of the Qi Refining stage?"

It turns out that Lin Yu had already reached the first level of the Qi Refining stage, but he was very dissatisfied because, according to the book "How is Spiritual Qi Cultivated?", a normal cultivator only needs ten or eight days to reach the first level of the Qi Refining stage.

The spiritual energy content in a low-grade spirit stone is equivalent to one day's cultivation of an ordinary cultivator at the first level of the Qi Refining stage.

Logically speaking, he should only need ten, or at most twenty, low-grade spirit stones to easily reach the first level of the Qi Refining stage.

What's going on?

"Could it be," Lin Yu muttered, "that because I now possess a Chaotic Dao Body, and the Devouring Heaven Divine Art I cultivate is of such a high grade, that I require more spiritual energy for each minor realm?"

Five hundred low-grade spirit stones are needed to reach the first level of the Qi Refining stage?

Doesn't that require fifty times more spiritual energy than an ordinary cultivator?

Lin Yu's eyes widened, then he angrily shouted, "System, come out here and explain yourself! Why did you give me the Chaotic Dao Body and the Devouring Heaven Divine Art? Are you trying to harm me?"

Even the system was exasperated: "While it's true that you need more spiritual energy to advance your realm than ordinary cultivators, isn't that proof of your strength? The more solid your foundation, the higher your success rate in overcoming tribulations. Besides, the more spiritual energy you have, the stronger you are. What do you think is the reason for challenging those above your level?"

Both are at the first level of Qi Refining, so Lin Yu can take on fifty of them?

Are you still not satisfied? Aren't you happy?