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

After receiving the vast amount of memories as a mission reward, Lin Yu now possesses the abilities of both an alchemist and a formation master.

The pills were secondary; Lin Yu discovered that if he could set up a spirit-gathering array, he could unleash more spiritual energy from the limited number of spirit stones he possessed.

Although he can only set up a first-grade spirit gathering array now, which is the lowest level of array.

However, the effect of a first-grade spirit-gathering array can amplify spiritual energy by 10%.

Simply put, ten spirit stones can be used as eleven spirit stones.

Such an increase is already quite considerable.

Moreover, the spirit stones required to set up the formation are only ten low-grade spirit stones.

"A second-grade spirit-gathering array can increase the effect by 20%, but it requires one hundred low-grade spirit stones. Moreover, a second-grade array requires the fifth level of Qi Refining cultivation, which I do not yet meet the requirements for setting up," Lin Yu sighed inwardly.

His cultivation level is still too low.

Don't underestimate the effect of just 10% improvement; the number of spirit stones required is ten times that of a first-grade spirit stone.

However, he has 10,000 low-grade spirit stones in his possession, and the improvement effect will only bring more benefits than the spirit stones consumed.

Moreover, the more spirit stones you have, the more benefits you receive.

If you reach the third grade of the Spirit Gathering Array, although it will cost a thousand spirit stones, the amplification effect will be 30%.

Ten thousand spirit stones are equivalent to thirteen thousand yuan, so it's a profit no matter how you look at it.

What if it's 100,000? You can get an extra 30,000 spirit stones.

The fourth-grade spirit gathering array is a watershed moment. Not only does it require a thousand mid-grade spirit stones to set up, but it also requires at least the cultivation level of the Golden Core stage to control.

In fact, cultivation level is secondary; the main problem is insufficient spiritual awareness.

Lin Yu couldn't help but sigh again, wondering if the choice he made when he was assigned to a different department was right or wrong.

Not only does setting up formations require the assistance of divine sense, but also refining high-level pills in the future will require the assistance of divine sense.

If one's spiritual sense is strong enough, even with only the cultivation level of the Qi Refining stage, one can still set up advanced formations.

After all, the formation consumes spirit stones, not the spiritual energy of cultivators.

Pity.

Because of his Chaotic Dao Body and the fact that he cultivates the Devouring Heaven Divine Art, which is known as the supreme Dao technique, Lin Yu requires almost fifty times the spiritual energy of an ordinary cultivator to improve his cultivation. This also makes him fifty times stronger than an ordinary cultivator at the same level.

However, his spiritual consciousness was the same as that of an ordinary cultivator.

Therefore, Lin Yu could only take out ten low-grade spirit stones and then start setting up the formation according to the description in his memory.

As Lin Yu placed the ten spirit stones on the ground around him, he then used his divine sense to guide the spiritual energy, creating a special connection between the spirit stones according to a certain trajectory.

In an instant, a special space suddenly formed inside the House of Requirement.

This is the Spirit Gathering Array.

The space of the first-grade spirit gathering array is not large, with a total area of ​​no more than one meter square.

But for Lin Yu alone, it was enough.

As soon as the formation was completed, Lin Yu immediately felt that the space within the formation was filled with spiritual energy.

That's right, in this magical world where only magic exists, there is actually something called spiritual energy.

Lin Yu knew perfectly well that this was actually the energy emitted by the ten low-grade spirit stones, activated by the Spirit Gathering Array.

The formation has a limited duration; it can only last for one hour at a time, which is two hours.

Moreover, once this spiritual energy is exhausted, it will not be generated out of thin air.

Lin Yu wouldn't waste any time. He immediately took out a large number of spirit stones and spread them on the ground. Then he jumped up and sat cross-legged on the pile of spirit stones. He closed his eyes, meditated, and began to circulate his cultivation technique.

A large amount of spiritual energy surged out from the spirit stone. Due to its enormous quantity and the effect of the spirit-gathering array, the spiritual energy was almost tangible, making Lin Yu feel as if he were inside a layer of mist.

It was unclear how much time had passed, but the spiritual energy within Lin Yu's body continued to rise steadily.

As a supreme Dao technique, the Devouring Heaven Divine Art ignores levels and can be said to have no constraints whatsoever. As long as there is enough spiritual energy, breaking through realms is as easy and simple as drinking water, and there is not even the concept of consolidating one's realm.

After all, he now possesses the Chaotic Dao Body, and at the same cultivation level, his spiritual energy is already fifty times that of ordinary cultivators. If he were to further consolidate it, how would others survive?

It wasn't until more than an hour later that Lin Yu slowly opened his eyes.

At this moment, the spiritual energy within the spirit-gathering array was completely depleted, with not a single wisp of spiritual energy remaining.

"What a pity," Lin Yu muttered to himself, "did he not break through to the fifth level of the Qi Refining stage after all?"

At this moment, Lin Yu had already reached the fourth level of the Qi Refining stage.

However, there is still a short distance to go before reaching the fifth level of the Qi Refining stage.

Unfortunately, he still didn't have enough spirit stones. Even if he had two thousand more, no, even if he had a thousand more low-grade spirit stones, he could have broken through to the fifth level.

Lin Yu subconsciously looked at the pile of spiritual fruits in the system space. After thinking for a moment, he decided to take advantage of the fact that the spirit gathering array was still effective, even though the spiritual energy inside had been completely consumed.

Lin Yu took out a spirit fruit, put it in his mouth, chewed it a couple of times, and swallowed it.

Before he could even savor the sweet taste of the juice, Lin Yu closed his eyes again. He felt the juice transform into a cool spiritual energy as it entered his body, quickly flowing into his dantian as he circulated his cultivation technique.

The effect is surprisingly good? Even better than low-grade spirit stones?

Lin Yu's eyes lit up, and he quickly took out more fruit and put it in his mouth.

Finally, after consuming countless spiritual fruits, Lin Yu's aura surged dramatically, and his cultivation level finally broke through to the fifth level of the Qi Refining stage.

"Haa," Lin Yu finished his exercise, opened his arms, and stretched comfortably.

"It's a pity this is a magical world. If this were a normal fantasy world, I probably would have already reached the Foundation Establishment stage by now," Lin Yu couldn't help but sigh.

It's only been a few days, and he has already broken through to the fifth level of the Qi Refining stage.

This is because there is no spiritual energy in the world here.

Otherwise, he would have progressed even faster, and might even have already reached the Foundation Establishment stage.

System: If this were a normal fantasy world, you wouldn't get this many good things, at least not at this stage.

Lin Yu, unaware of the system's intentions, began packing his things.

As his cultivation level improved, the side effects, such as headaches, that he had previously experienced from receiving memories were greatly alleviated.

This is the benefit of enhanced spiritual awareness.

At the same time, the spiritual energy within Lin Yu's body became increasingly dense, far exceeding the level of the first stage of Qi Refining by more than just five times.

In fact, it should be twice twice twice twice twice twice the level of the first stage of Qi Refining.

Lin Yu silently calculated: "Given the current situation, the amount of spirit stones needed will only increase. Fortunately, I still have one mission reward I haven't claimed, which directly boosts my Qi Refining stage cultivation by one level. Wait, I remember it said 'one level up from the current cultivation stage,' right?"

System: "...Please have some self-respect, host. Didn't you request to change your cultivation level to the first level of the Qi Refining stage?"

Lin Yu: Oh no, the system has become sentient.

My Mahayana practice has reached its perfect completion.