Long Yun naturally didn't know that the moment he fell into the underground abyss, his every move was closely monitored.

For the current Long Yun, how to adapt to the environment of this abyss and survive in it is the only and most urgent thing to consider.

Qinglong taught him the method of using the energy contained in the energy crystal to carve out a cultivation stone house in the rock wall of the nearby space, although it was wonderful, it was also very physically demanding and energy-consuming. After only about one meal, the amount of Pei Yuan function in Long Yun's body was consumed by as much as half.

This was obviously expected by Long Yun, so he didn't seem too surprised. At the beginning, he secretly saved six points of strength in a secret room in the mind space, and only used forty percent of all his energy on the excavation of the stone house, and secretly kept some hands on the emergency situation, after experiencing Qiao Jie's case, he would not easily trust anyone in its entirety.

The excavation work went relatively smoothly, and after the energy consumption in his body was close to sixty percent, Long Yun stopped and used a period of time to recover his strength, and by the third time of the cycle, a spacious, bright, silver-lit stone house lit by energy crystals gradually took shape on the rock wall.

Long Yun still didn't dare to slack off, and after arranging a set of positive and negative energy whirling arrays taught by Qinglong in front of the stone house, his nervous mood relaxed a little.

According to Qinglong, this positive and negative energy whirling array uses the cathode and anode of energy contained in the energy crystal, and uses the mind to connect the two levels in front of the door through mysterious connections to form an energy array equivalent to tens of thousands of volts, which has a certain defensive effect. You can also use your mind to manipulate powerful voltages to attack enemies without leaving the stone house, but the only drawback is that once you leave the energy field, it will be useless in the range.

Regarding the restriction that this positive and negative energy whirling array could not be used when leaving this place, Long Yun didn't care much about it. He understands his situation very well, and in the case that his life may be lost at any time, the premise of considering the problem is to ensure his own safety first.

Long Yun narrowed his eyes, stood in front of the stone house that had just been dug and carefully inspected it several times, and only after finding that everything was in order, did he enter the stone house, and at the same time opened the positive and negative energy whirling array that protected the stone house.

After sitting cross-legged on the bed in the stone house, Long Yun began to operate the third layer of Pei Yuan Gong, and he found the wonder of this room, the energy of his whole body actually surged more than twice out of thin air, and the cultivation bottleneck that had been stuck for many days was gone, and after confirming, Long Yun decided to immediately impact the realm of the fourth layer of Pei Yuan Gong, regardless of his physical and mental exhaustion.

While opening the acceleration vortex of the mind space to comprehend the essentials of the fourth layer of Peiyuan Gong's mantra, Long Yun drove the power of his mind to absorb the energy contained in the energy spar in the rock, increasing his reserve of energy needed to impact the fourth layer of Peiyuan Gong.

In the process of comprehending the mantra and accumulating energy, it is equivalent to a day and a night on the ground that flies by.

When the third day came, Long Yun had fully comprehended the fourth-layer Peiyuan Gong mantra, and the absorption and accumulation of energy had reached a new critical point.

Long Yun stopped the acceleration of the thinking space and the absorption of the surrounding energy. Rush all the energy gathered towards the bottleneck of the peak of the third layer of Pei Yuan Gong.

Half a day later, an unusually powerful energy in the stone house suddenly burst out, and there was a slight muffled sound, and then a long laugh of joy resounded through the small half of the underground space here.

In the stone house, Long Yun's mind moved slightly, and he condensed the Pei Yuan functional energy that had just been cultivated to the fourth layer on his middle finger, and with the guidance of his mind, a white energy light the size of a soybean flashed out between his fingers, brighter than the light emitted by the rock crystals in the stone house.

"Go!" Long Yun's fingers flicked slightly, and the white light bolted towards the rock wall in the stone house.

After a soft "snort", the white light flashed into the rock, and then the sound of falling stone chips came from the rock, and a hole several inches deep and the size of an egg appeared in the stone wall.

It seems that the power of the Fourth Pei Yuan Gong with the blessing of the energy crystal is really not small, and Long Yun's understatement can cause such great damage with a single blow.

"I didn't expect this son to be a cultivator with a spiritual vein, hahaha, it's really hard to find a place to step on iron shoes, and it takes no effort to get it. The old man has been waiting silently for so many years in this invisible underground abyss, and finally has the opportunity to get rid of this devilish body and leave this ghost place to see the sun.

Now you just need to wait for this kid's cultivation to improve to the point where he can withstand the same cultivation of the old man, and the time for the old man to start will come. "In a spacious mysterious hall deeper in the abyss, the head in the middle of the three ugly head giants had his eyes shining, and he muttered to himself as he looked at the figure of Long Yun sitting cross-legged on the rock in front of him.

"Boy, this stone house is of some use to assist in cultivation, right?" Long Yun was about to re-operate the Pei Yuan Gong, which had just broken through to the fourth layer and had not yet fully adapted to it, several times in order to further consolidate the realm, when the voice of the green dragon came from his mind.

"As the seniors said, this energy crystal is indeed somewhat useful for assisting cultivation. I just don't know if it will be effective when it reaches the ground. Long Yun affirmed Qinglong's method without thinking, and then asked again.

"Although this thing is mixed in the rock so deep underground, its energy belongs to the ore itself, and if it is moved to another place, it should be arranged properly, and it should be no problem to play an effective role, don't you kid think? ......" Long Yun suddenly understood Long Yun's intentions and asked in surprise.

"I do have this idea, I don't know if it works, please ask my seniors for advice." Long Yun interrupted Qinglong's words without thinking.

"Well, it's a good idea to bring these hedrons to the ground, but from an insurance point of view, it's better to further cultivate here first, and then consider bringing the energy spars back to the ground when you have the ability to return to the ground, isn't it more practical?" Qinglong pondered for a moment.

"It seems that it can only be like this, but my predecessors belong to the same body as me, and my cultivation has gone up, and my predecessors will not be without any benefits." Long Yun suddenly said coldly to the Qinglong in his mind.

"That's natural, no matter who you and I improve our cultivation, we will benefit at the same time. Otherwise, the old man wouldn't be so concerned about the improvement of your cultivation. Unexpectedly, Qinglong replied without hesitation, which was a little unexpected for Long Yun.

"According to the opinion of the seniors, the next step is not to cultivate the art of the body in advance. Long is still a little confident in his own mind's ability to withstand the art of body refining. Long Yun suddenly asked a question that surprised Qinglong.

"Cultivate the art of the body in advance, kid, your brain is not in the water, is it?" Qinglong asked in surprise.

"Since I am going to cultivate in advance, I have estimated some difficulties." Long Yun is not in a hurry or dry.

"Boy, do you know how much risk a normal spiritual vein body has to take to start cultivating before breaking through the fifth layer of the Peiyuan Period, not to mention the need for a strong mind to control energy, and how much risk it takes for a physical body to cultivate the art of body refining? The great pain that the body refining technique had to endure on the body was beyond the imagination of cultivators below the fifth level of the Peiyuan Stage. Qinglong's tone was tinged with warning.

"What Long decided to do, even if he took some risks, he would not back down. The words of persuasion are better to be withdrawn by the seniors. Long Yun's tone was firm and said to the Qinglong in his mind.

"The old man is not denying your idea, but just informing you of the risks of cultivating the art of refining the body in advance, so that you can be fully prepared. With your innate ability to control your mind that is stronger than the ordinary spirit vein body, plus the consumption of the biological crystals and flesh in the body of this ancient two-legged giant beast, cultivating the art of refining the body as soon as possible is a way to strengthen the body as soon as possible, and the probability of success is relatively large. Qinglong said in a calm tone.

"Since the seniors also think so, Long is relieved, and asks the seniors for more guidance." Long Yun finally persuaded the old guy Qinglong and breathed a sigh of relief. Otherwise, if this old guy doesn't cooperate in cultivation, it will definitely bring a lot of unexpected troubles.