After more than half a month, Nie Fei returned to the cave again, and as soon as he walked into the cave, he saw those familiar objects, all of which were purchased by himself, and he couldn't help but feel a sense of intimacy.

After Nie Fei simply cleaned up the cave, he sealed the entrance to the cave and began to cultivate.

What he wanted to do most in this cultivation was that after his cultivation was over, he could practice the first transformation of the Nine Transformations of the Ice Spirit, so he set a goal for himself, the level of spiritual energy should be cultivated to at least the sixth level of Qi refining, and the absorption of cold qi should also reach the level of Cheng Dù, who could fully display the Ice Spirit Transformation.

Unbeknownst to him, within a few days of cultivation, he ran into trouble. Because what he was most eager to see and see, what kind of Cheng Dù was the Nine Transformations of Xuanbing that belonged to the Absolute Martial Arts, so at the very beginning, he continued to take the sunflower liquid to increase the cold qi in his body.

After absorbing the cold qi for five days, Nie Fei found that the cold qi absorption became extremely slow, and after another two days, no matter how much he took the sunflower liquid, the cold qi could not absorb a bit.

This made Nie Fei have to temporarily stop his cultivation and wonder why this kind of problem occurred. However, he really didn't understand the principle of this cold qi, and after thinking about it for a long time, he had no clue, so he had to put the matter on hold for the time being, and instead went to absorb the elixir herb.

The spiritual energy in the Soul Relief Grass is like a thread, like a stream, flowing into the sea of qi, and stored in the sea of qi. After this process, this aura was already available to Nie Fei and became a part of his body.

Just as Nie Fei was enjoying the pleasure of this trickle in his body, suddenly, a cold qi rose from his abdomen, and it flowed directly into the sea of qi along the veins, combining with the spiritual energy in the sea of qi. Nie Fei was taken aback, this phenomenon was exactly the same as when he absorbed the sunflower liquid and the cold qi entered his body. "However, I didn't take the Sunflower Elixir, how could there be so much cold out of thin air?" Nie Fei was shocked and surprised, puzzled.

This kind of aura that comes out of thin air is no different from getting something for nothing, just like picking up something for nothing, which really makes people feel happy. But for Nie Fei, this kind of uncertain thing, he has never had a bottom in his heart. What he couldn't judge in his heart, even if it was a good thing, Nie Fei accepted it, and he only felt unspeakably awkward. This extra cold air out of thin air seems to be a good thing, but who knows if it will change and become a disaster?

Nie Fei thought about it for a while, suddenly remembered something, and suddenly settled down. It turned out that he thought of the sunflower he had taken before, and there should still be some left in his abdomen at this time, and the cold in it had not been completely absorbed. This time, the cold air should be the cold qi in the residual sunflower liquid that was absorbed by itself. Actually, it couldn't be simpler.

However, immediately after that, Nie Fei fell into confusion. He had two questions: first, why was he suddenly able to absorb the cold qi when he couldn't absorb it, and second, why he could only absorb it at this time, but not before.

Following this line of thought, Nie Fei thought that before and after, there was only one difference, that is, he had absorbed the aura in the Spirit Relief Grass. That also means that the aura in one's own sea of qi has increased. The increase in aura brings about an increase in chill.

Nie Fei suddenly smiled, this is really a simple truth, you only need to use your brain a little, you can figure it out. It turns out that the cold qi is attached to the aura and is limited by the aura, and if the aura is not enhanced, then the cold qi cannot be absorbed endlessly. Therefore, it is said that aura is important, not only to improve the realm of cultivating immortals, but also to limit the use of various attributes.

Nie Fei relaxed, the reason why the sunflower liquid could not be absorbed was not that there was any problem with the sunflower liquid, but that the cold qi attached to the spiritual energy in the body had reached its limit. This is simple, just continue to absorb the aura, and this cold energy can be absorbed again.

Next, Nie Fei's main cultivation was to absorb Xie Lingcao's aura.

......

Forty-two days later, Nie Fei stopped cultivating again. In the past few days, Nie Fei's aura level has been raised from the fourth layer of qi refining to the seventh layer of qi refining. In fact, if it was normal, after such a long time, at least one more layer could be raised, reaching the seventh layer of qi refining. However, Nie Fei was halfway through his cultivation, that is, when he had just reached the sixth layer of Qi refining, when he found that there was another problem with the medicinal liquid of this Xie Ling Cao. He found that after the sixth layer, after taking the next bottle of Xie Ling Herbal Liquid, the aura increased not as much as before.

This manifestation, at first glance, is not very obvious. Later, this became more and more significant. Later, a bottle of Xie Ling herbal liquid increased the aura less than one-tenth of the original.

At that time, Nie Fei was almost at the seventh layer, so he forcibly drank more than a dozen bottles of medicinal liquid, raising his level to the seventh layer, and then stopped cultivating.

Nie Fei looked at those Xie Ling herbal liquids, and couldn't help but feel a little irritated in his heart. People often say that this road to cultivating immortals is difficult step by step, and Nie Fei hasn't realized it at the beginning. But this time, he realized it deeply. At first, the sunflower liquid was ineffective, and after he found out the reason, he didn't expect that Xie Ling's herbal liquid would be invalid again. Nie Fei couldn't help but ask in his heart: "Why can't this path of cultivating immortals go smoothly?"

This question was asked several times in his heart, and suddenly, he himself laughed. Cultivating immortals is a thing against the sky, violating the laws of nature, and every step is full of hardships, which is really a normal thing. If this road of cultivating immortals is a smooth road, then everyone can cultivate immortals, and what is so strange about cultivating immortals? Everyone has become immortals, and the world is not chaotic?

Nie Fei couldn't help but think, "In the future, we must not regard these hardships as annoying things, but we must face them squarely, accept them happily, and overcome them, so that we can continue to move forward." ”

Thinking of this, Nie Fei's heart was suddenly resolved, and his mind calmed down.

Nie Fei was confident in himself that he could solve the problem of Xie Lingcao's failure, but after all, it would take some detailed thought, and at present, there was something more important than this, and that was to absorb the cold qi.

He already knew that the previous time he couldn't absorb the cold qi in the sunflower liquid, it was the aura that adsorbed the cold qi, and it had reached the limit, and he couldn't absorb half a point anymore. Now, his level has been improved from the fourth level of qi refining to the seventh layer of qi refining, and the amount of spiritual energy has increased more than a hundred times. And this moment is the moment he is looking forward to.