The speed of the wind and thunder wings is far above the half-spirit weapon of the shopkeeper Liu, after all, the abacus has too many functions and is not known for its speed, Yi Cheng only took more than an hour to return to the cave.

After arranging the purchased defensive formations around, Yi Cheng left enough barbecue for Xiao Jin for a few days, and then began to make the most preparations for the foundation building.

The so-called cultivation, whether it is the Qi refining period, the foundation building period, the Dan period or the Yuan Infant Transformation Spirit, the root of all this is to incorporate the spiritual power of heaven and earth into one's own body, so that he can call on it at any time.

The difference lies in the quantitative change and the qualitative change, within each great realm, in the early stage, middle stage, and late stage, the difference is only the change between the amount of spiritual power accommodated, such as the first level of qi cultivation and the tenth level of qi refining, and it is only the difference between the accumulation of spiritual power in the body.

Therefore, they are also Qi refining period cultivators, and many eightfold and ninefold cultivators can defeat the Ten Layers of Qi Refining, but a Qi Refining Ten important victory over a foundation building early stage cultivator, the difficulty is not ordinary, even Yi Cheng has this strength because of the dual cultivation of Lingwu. That's why the Dream Horror Leapfrogging to challenge the elders of the Yudan Stage will make people feel incredible.

The difference between the Qi refining period and the foundation building period is that the spiritual power forms in the body are different.

In the Qi refining period, the monk's dantian is a spiritual energy, no matter how strong the strength is, it is also a gaseous existence, and the foundation of the Qi cultivation breakthrough is to compress this spiritual energy into a liquid spiritual power, so that it can accommodate more spiritual power in the limited dantian space and achieve qualitative changes.

And the reason why the Tsukidan is precious is that he can protect the dantian from being shattered by sudden changes when the monk is building the foundation.

The reason why single spirit root cultivators could easily build a foundation was because the spiritual power attributes in their bodies were pure, and it was easier to be in the compression form, and the pressure on the dantian was much less.

Therefore, most of the ordinary single spirit root monks can build a foundation at one time, but after all, the single spirit root in the cultivation realm is very rare, take this trial as an example, among the more than 1,000 monks who have obtained the foundation building pill, there are only one or twenty monks with a single spirit root, which is almost a probability of one or two percent. Therefore, one can imagine how difficult it is for Yi Cheng, a monk of the Five Spiritual Roots, to build a foundation.

Recall the details you've seen about foundation building these days, then meditate to gather your mind and adjust yourself to the best possible condition.

This time, the meditation lasted for a whole day, and the spiritual power was restored to complete fullness, without distractions, and then Yi Cheng took out more than a dozen high-grade spirit stones and arranged them on his side, and the spiritual power in the room suddenly became rich.

Some family disciples will be arranged to some places with strong spiritual power when they break through, so that the monks can be arranged to terminate due to lack of spiritual power when they break through.

Yi Cheng naturally didn't have that kind of treatment, but these dozen or so high-grade spirit stones were arranged on his side, although they couldn't be used for a long time, but in the short term, the surrounding spiritual power was much better than the cultivation place of some Dan Stage monks, even if they were not willing to be so extravagant on weekdays.

After making all preparations, Yi Cheng took out the auxiliary pill, there were three in total, Yi Cheng took them one by one, and it took a quarter of an hour for the medicinal effects of these three pills to be completely refined by Yi Cheng, at this time Yi Cheng felt that his perception seemed to be much stronger, and his control of spiritual power was even clearer.

Now Yi Chengzhi has explained the effect of this auxiliary elixir, which is to allow the monk to increase the control of some spiritual power in a short period of time, and complete the process of building the foundation as soon as possible. At this time, everything was ready, Yi Cheng took out a Tsukidan, the pale yellow Tsukidan was only the size of a thumb, but for this Tsukidan, I don't know how many monks grabbed their heads.

Yi Cheng took a deep breath and sent Tsukidan into his mouth.

After the entrance of the Zhuji Dan, it turned into a stream of pure spiritual power into the Yi Cheng Dantian, evenly distributed around the Dantian, and the spiritual power of Yi Cheng's body slowly entered the Datian, whenever a trace of spiritual energy entered the Dantian, Yi Cheng used his divine sense to control it and compress it as much as possible.

Because Yi Cheng's spiritual power is a fellow practitioner of the five systems, his divine sense must also be divided into five parts and control the five spiritual powers at the same time, so that they will not be mixed up in their own bodies, Yi Cheng knows how violent the spiritual powers of different systems will be after the fusion, if he does not control the fusion of the spiritual energy in his body, he can completely blow himself to pieces.

The process of compressing spiritual power is very slow, fortunately, Yi Cheng has been accustomed to the extreme cultivation method when he cultivates on weekdays, and his control of spiritual power has already reached the realm of proficiency, otherwise Yi Cheng will not be able to control the spiritual power in his body freely at this time.

Time passed extremely slowly at this time, even if Yi Cheng's divine sense was strong, he felt a little tired after two hours of consumption, but at this time, his spiritual power was only compressed by more than half, and the spiritual power transformed by Zhuji Dan had gradually thinned, and there was a faint trace of pain in Yi Cheng's dantian.

Yi Cheng didn't dare to hesitate, nor did he want to give up, so he swallowed another Tsukidan at the moment, and then compressed the spiritual power.

Time passed little by little, when Yi Cheng felt that the five spiritual qi on his body had gradually turned into a pure liquid, the medicinal effect of the second Zhuji Dan gradually disappeared, and at this time, for Yi Cheng, he was now facing another problem, which Yi Cheng had not expected at all.

Although the five spiritual powers in Yi Cheng's body have been compressed, don't forget, he has also cultivated an immortal formula, the spiritual power produced by this longevity recipe is extremely mysterious, and it has always coexisted with the five spiritual powers in Yi Cheng's body, and occupies a dominant position, if the meridians in Yi Cheng's body are compared to a river, then this immortal spiritual power is the water in this river, and the five spiritual powers are five incompatible other liquids, which coexist in this river.

Now that the five spiritual powers have been emptied and completely compressed in the dantian, there is only immortal aura left in the meridians in Yi Cheng's body, and when Yi Cheng wants to compress this spiritual energy together, he finds that the difficulty is not ordinary, but the divine consciousness consumed by this kind of spiritual power is stronger than the five kinds just now, seeing that the foundation is about to be built, Yi Cheng has compressed the spiritual power of the five systems, how can he be willing to give up at this time, so he retracted his mind and concentrated on controlling the spiritual energy into the dantian with a trace of it, and slowly compressed it.

The compressed time was extremely slow, Yi Cheng had long forgotten the time, and there was only one thought in his heart that this spiritual power compression had completed the foundation building success. Yi Cheng's divine sense was slowly depleting, he almost felt that he was already a little sleepy, and the feeling of dizziness hit his mind, but at this time, giving up everything Yi Cheng had done was in vain, he could only grit his teeth and persevere, to see if he could persist or if this immortal spiritual power was more tenacious.

With this belief, although the consumption of Yi Cheng's divine consciousness is huge, he still maintains a trace of clarity, almost mechanically doing the work of compression. Maybe it was because this mechanical action consumed the least of his sense, and Yi Cheng didn't know how long he had persevered, but he felt that he had been constantly compressing his spiritual power in this matter, and he was already sleepy and had no strength.

When the last trace of immortal spiritual qi turned into a pure liquid state, Yi Cheng finally put his mind at ease, at this time he was considered to have completed half of the foundation, and the rest was much simpler, as long as there was enough spiritual power to replenish, the foundation building was completed.