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

"Splash!"

Inside the "Always Grants Requests" room, a huge pile of spirit stones covered the floor, totaling more than 200,000 pieces.

Even if a low-grade spirit stone is only the size of a child's fist, if more than 200,000 of them are piled together, they would almost cover the entire floor of the room.

Hermione knew that Lin Yu was going to set up a spirit-gathering array, and that she would only be in the way and might accidentally absorb a lot of spiritual energy.

So she offered, "I'll go back to the lounge and wait for your good news."

After Hermione left, Lin Yu immediately set up the formation.

But then a thought suddenly struck him, and he muttered to himself, "Although a Grade Three Spirit Gathering Array requires Foundation Establishment cultivation, the array can be set up primarily using divine sense, creating interconnected formations. I've been cultivating the Great Evolution Heaven-Reaching Technique for quite some time now, and although I'm still stuck at the first level, my divine sense strength far surpasses that of ordinary cultivators. Moreover, I can already project my divine sense outwards. Should I give it a try?"

Lin Yu and Hermione have always used a second-grade spirit-gathering array when cultivating.

This is because the setup requirements for a Grade 3 Spirit Gathering Array have reached the Foundation Establishment stage.

But now, not only has his cultivation level reached the ninth level of the Qi Refining stage, but he is about to break through to the tenth level. It is even possible that the tenth level is the Great Perfection of the Qi Refining stage, which is infinitely close to the Foundation Establishment stage.

Moreover, the Great Evolution Heaven-Reaching Technique greatly enhanced his spiritual consciousness.

Compared to the spiritual strength of a Foundation Establishment cultivator, it shouldn't be much weaker.

Thinking of this, Lin Yu narrowed his eyes, then released his divine sense and began to quickly draw magic arrays on the floor and in the space.

As the grade of the formation increases, the formation becomes increasingly complex to draw.

If a first-grade formation only involves outlining a few strokes, then a second-grade formation requires adding more strokes, and a third-grade formation requires becoming even more three-dimensional.

According to Lin Yu's memories and insights, once you reach the fifth rank or higher, you need to inscribe runes, and once you reach the eighth rank or higher, you need to involve the laws of heaven and earth.

Therefore, Lin Yu believed that sooner or later, he would be able to set up an array that could convert magic power into spiritual energy.

Because sooner or later, he will come into contact with the true meaning and laws of this world.

However, that day is still a long way off.

At this moment, as Lin Yu continued to outline the formation with his divine sense and sacrificed a full thousand low-grade spirit stones, the third-grade formation slowly took shape.

"It's done."

The moment the Grade 3 Spirit Gathering Array was formed, a soft "hiss" was heard.

Among the spirit stones scattered on the ground, countless spiritual energies were rapidly activated, and then condensed into a dense fog of spiritual energy visible to the naked eye, gathering without dispersing.

Moreover, the Grade 3 Spirit Gathering Array already has a 30% amplification effect, so 10,000 spirit stones can be used as 13,000 yuan.

And here, there are more than 200,000.

This is equivalent to having tens of thousands more spirit stones' worth of spiritual energy appear out of thin air.

Moreover, the scale of the Grade 3 Spirit Gathering Array is large enough to easily encompass the entire House of Wishful Thinking.

Hermione left on her own initiative to prevent her innate sacred body from automatically absorbing spiritual energy, fearing it would affect Lin Yu's advancement.

Lin Yu stood there, took a deep breath, and felt the spiritual energy spontaneously enter his body, making him feel refreshed and indescribably happy.

He then sat down cross-legged, closed his eyes, and began to circulate the Devouring Heaven Divine Art.

The spiritual energy rapidly entered Lin Yu's body, absorbing all the surrounding spiritual energy like a whale swallowing its prey.

Fortunately, there were enough spirit stones, and soon another dense cloud of spiritual energy was emitted, which was then absorbed by Lin Yu, and then the cloud of energy was emitted again.

He began to rapidly improve his cultivation level.

Lin Yu didn't know how much time had passed, until the spirit stones covering the ground slowly dried up and the spiritual energy was no longer so rich. He felt that the spiritual energy in his dantian had reached a certain bottleneck.

As he absorbed the last trace of spiritual energy, his cultivation level finally loosened.

As if hearing a soft "poof" sound, Lin Yu opened his eyes and murmured, "Sure enough, the tenth level is not the Great Perfection. Only by completing the tenth level can one achieve true Great Perfection."

It seems that Lin Yu's previous worries were not unfounded; the tenth level of Qi Refining still requires a large amount of spiritual energy for cultivation.

Compared to the more than 200,000 spirit stones required for the ninth to tenth levels of the Qi Refining stage, the Great Perfection of the Qi Refining stage requires 512,000 low-grade spirit stones.

This is simply an astronomical figure.

At least for Lin Yu right now, it would take completing countless missions to accumulate that amount.

"Isn't this too much?" Lin Yu frowned, even though he knew that because he had the Chaotic Dao Body and cultivated the Supreme Dao Technique, his superior aptitude meant he needed more resources.

Of course, he didn't absorb all that spiritual energy for nothing. His actual combat strength was at least five times that of an ordinary cultivator, and he could easily handle challenges beyond his level.

But wouldn't that require too many resources?

An ordinary cultivator only needs 100,000 spirit stones, but he needs more than 500,000.

In fact, 100,000 low-grade spirit stones are enough to allow an ordinary cultivator to advance directly from the first level of Qi Refining to the Great Perfection, or even complete the Foundation Establishment stage.

Lin Yu sighed silently, put aside his thoughts, and said to the system, "In that case, give me the reward from before."

He had been keeping a reward in the system, a reward that could directly raise his cultivation level by one stage in the Qi Refining stage.

Without further ado, the system opened its system space, and a terrifying wave appeared above Lin Yu's head.

That was a dense torrent of spiritual energy, which, like a sudden enlightenment, was directly injected into Lin Yu's body by the system. It entered through the Baihui acupoint, passed through the meridians throughout his body, and finally converged in his dantian.

Of course, ordinary people shouldn't try this. The Baihui acupoint is very important. Even if an ordinary person taps someone on the head, it can easily cause serious problems.

If someone knows some martial arts, a hard slap on the Baihui acupoint can easily kill someone (that's how it's portrayed in movies).

However, this is a system, so there is naturally no danger.

Lin Yu closed his eyes again and silently circulated his cultivation technique until his dantian was completely filled with spiritual energy.

Just like an ordinary person who has eaten too much, he felt as if his dantian was about to explode, and he hurriedly shouted in his mind, "That's enough, that's enough, it's already overflowing. Any more and it will explode."

The torrent of spiritual energy then ceased and disappeared.

Lin Yu was in a dilemma. He was now completely unable to stop his cultivation technique. If he stopped, his dantian would be burst by the overflowing spiritual energy.

As the saying goes, anything produced by a system is bound to be of high quality.

Even though he was only at the tenth level of the Qi Refining stage, this level of cultivation directly allowed Lin Yu to reach the Great Perfection of the Perfection level.

This is just too perfect, it's about to explode!

While cursing under his breath, Lin Yu had no choice but to grit his teeth and enter a strange state.

Foundation building, he is currently in the process of foundation building.

There was no other way; Lin Yu was now almost unable to move, and dared not stop his cultivation, so he was forced to begin Foundation Establishment.

"It's all or nothing. If I fail to establish my foundation, my very foundation will be destroyed. But if I don't establish my foundation at all, my dantian will explode. It will kill me."

Lin Yu frowned, his divine sense fixed on the changes in the spiritual energy within his dantian. As the cultivation technique was activated, he saw the large mass of spiritual energy begin to condense together, eventually evolving towards becoming substantial.