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Immediately, Yu Yilie followed Wu Chen to understand what things needed to be prepared for the foundation.

And along the way, Wu Chen also recounted in detail the experience of his last attempt to break through, it turned out that once the monk reached the Great Perfection of Qi Training, the mana in the dantian would be saturated, and no matter how much he cultivated, he would not improve in the slightest.

Unless, the mana is condensed and purified, it is possible to improve a little, but this is also one thing that needs to be done before building a foundation.

After cultivating to the Great Perfection of Qi Cultivation, you can take the Purple Condensate Fruit to condense and purify your mana, so that you will not lose your strength when you break through.

After that, you can exchange for some medium-grade fire spirit stones and condensing incense in the sect, the spirit stones are used to quickly restore the consumption of mana, and the condensing incense can help the breakthrough person always maintain a clear state, so as not to go crazy at a critical moment.

The last step is naturally to take the Zhuji Dan, cut the marrow of the I Ching, reincarnate, and condense the monk's gaseous mana into the true element, which can be regarded as a successful breakthrough.

Accompanying Wu Chen to various places in Blazing Sky Peak, Yu Yilie learned a lot, and Wu Chen completely spent all his savings this time and was ready to give it a go.

In this regard, Yu Yilie could only pray silently for him from the bottom of his heart, hoping that he could succeed.

After returning to the cave, he set up a sign at the door saying "Do not disturb the retreat and cultivation", preparing to fight a protracted battle and concentrate on cultivation.

As for the three tasks of the sect every month, he only needs to hand in some pills after leaving the customs to get through, and there is no difficulty at all.

The next batch of elixirs refining the Fire Spirit Pill still had some time to mature, and taking advantage of this time, he took some of the remaining Fire Spirit Pills from the last refining to improve his cultivation.

Since he broke through the eleventh layer of Qi training, the amount of magic power required for each layer has also increased a lot, but he doesn't know how long it will take to break through to the next layer.

In the innermost stone room of the cave mansion, Yu Yilie sat on the stone bed, took out a jade bottle from the storage bag, poured out a red pill, stuffed it into his mouth, and began to cultivate...

Time passes little by little, every day at three o'clock in Yilie, practice, check the fire jade, and feed the heavenly dream.

During this period, Senior Brother Lu Yiguan came to squat outside his cave many times, but unfortunately, he never found anything, and the last time, he happened to catch up with Wu Chen to successfully break through the foundation building period, and he had to give up helplessly for a long time.

Two months later, Yu Yilie finally waited for the next batch of elixirs to mature, and after two months of intensive cultivation, his mana had also improved a lot, and he could reach the saturation of the eleventh layer of Qi training.

After leaving the customs non-stop, he went to the Red Refining Cliff to ask for a fire room, preparing to refine the Fire Spirit Pill, continue to cultivate, and break through the twelve layers of Qi training.

At this time, the thick stone door in the earth fire room has been closed, and it is relatively dim because the earth fire is not opened.

Walking slowly to the stone bed, Yu Yilie snapped his fingers casually, and a small flame appeared on the oil lamps on the stone walls on all sides at the same time, igniting the wick.

Now, without his token, even a foundation building monk would have to take a lot of effort to open it, and Yu Yilie was not worried that someone would break in.

When he came to the stone bed and crossed his knees, Yu Yilie's mind sank into the fire jade and looked it up.

I saw that ten zhang away from the jade stele, a large artificial lake reflected the shadow of a piece of grass and trees, but on the shore, divided into four ring areas, there are many elixirs growing in clusters, among which the fire attribute is the most lush.

In the lake, there are a lot of spiritual lotus growing, at the bottom of the lake, scattered with dense water spirit stones, in the center, there is a six-diamond-shaped spirit array.

In the Spirit Gathering Array, Yu Yilie put all the Wang Lotus seeds he got from the secret realm inside, waiting for this thing to grow.

After consulting a lot of elixir maps from the Dan Pavilion, he realized that this thing was called Red Spirit Wang Lian, a genus of fifth-order elixirs, which had the effect of condensing the primordial spirit, strengthening the primordial spirit, and maintaining the clarity of the cultivator's mind, which was of great help to break through the true pill stage and get rid of the demons in the heart.

It's just that Yu Yilie doesn't need it now, but it doesn't prevent him from planting lotus seeds in advance, and it may not be possible to use them in the future.

Under Yu Yilie's orders, Di Yang had already prepared the medicinal materials for refining the Fire Spirit Pill and put them in a storage bag, Yu Yilie didn't stay too long, took the storage bag and left the fire jade.

His eyes opened, and a faint light lit up in the dimly lit secret room, Yu Yilie reached out to catch the storage bag, and after his spiritual sense probed to check it, and after making sure that there was no problem, he put it aside.

Then, Yu Yilie's expression was solemn, his eyes were condensed, and he urged his mana to hit a magic trick under the Dan furnace in the middle of the earth fire room.

"Boom~" The fire array under the Dan furnace suddenly lit up, and a raging fire snake suddenly drilled out, devouring most of the volume of the Dan furnace.

The scorching breath emanated at once, and the fiery red flames reflected the fire room red.

After controlling the intensity of the earth fire, Yu Yilie waited for another quarter of an hour, and after the Dan furnace was preheated, he held it with his right hand and urged the mana to grab the furnace lid and put it aside.

At the same time, his spiritual sense quickly poked into the storage bag on the side, controlling the fire attribute elixir to fly out and burrow into the Dan furnace.

Different from refining the Qi Gathering Pill, this Fire Spirit Pill requires a stronger and more fierce earth fire to refine medicinal materials, and at the bottom of this Dan furnace, there are three small holes to allow the purest earth fire to drill in.

One by one, the medicinal materials were put into the Dan furnace for refining and purifying, from low to high, and every time one was refined and purified, he quickly took out a jade bottle and filled the powder or liquid medicine.

Refining, purifying, bottling, and constantly circling this boring action, but Yu Yilie seemed to be in a trance, and mechanically completed this task without the slightest mistake during the period, let alone the failure of refining.

In the past two years, he has practiced the basic skills of this alchemy very solidly, after all, purifying medicinal materials is only the first step, and then it is necessary to condense the pill liquid, gather the pill, take the pill, etc., each step seems simple, but there are many details that need to be paid attention to, and if there is a slight mistake, the previous efforts will be wasted.

Especially in the step of Ning Dan liquid, if you make a mistake, the entire medicinal material will be scrapped, and the blood loss will be incomparable, and you will not even be able to get it back.

When gathering the pill, we should pay attention to controlling the strength of the earth fire, when condensing, we must control the earth fire to become stronger, after condensing, we must control the earth fire to weaken, if we do not grasp the good time, the quality of the pill will decline a lot.

After becoming a pill, there is also a lot of attention to the step of taking the pill, Yuan Shi once told him that he must be cautious when taking the pill, and even take out the waste pill or even the poison pill if there is a slight mistake.

However, Yu Yilie obviously couldn't understand the deep meaning, so he didn't take it to heart at all, for him, the pills were all practiced, just take them out directly, where is there so much trouble.

If he is particular, his principle of taking Dan is to follow his feelings!