Time passed slowly, and a day later, Cheng Ling finally filled up his dantian lake again, and his cultivation was restored to the late Yuan Infant period. However, in this way, the purity of the True Yuan Essence decreased again.

At this time, he already felt that the speed of refining on the periphery was too slow, and he stood up, preparing to go to the center of the lava cave. There, presumably, the temperature is higher and the refining speed is faster.

After walking forward for a while, I felt that the temperature was gradually rising, and it was still within the tolerance range, so I continued to move forward. But after walking for a while, after stepping over a raised magma stone in the middle of the path, suddenly, the scorching heat in front of him tripled.

Snort!

His protective energy was burned away by the scorching heat, and less than an inch was left on his body. Only then did Cheng Ling realize that the magma road under his feet was different from before, and his eyes were deeper and the temperature was higher.

Looking up, I found that after a while, there was a raised distinguishing point, and it was obvious that the temperature in this molten cavern was still graded. But at this point, Cheng Ling already felt the limit of bearing.

He stopped moving forward, sat down cross-legged, and continued to refine the true element.

Bai Yiyi and Gu Youlan were originally contemplating the artistic conception of water, but only half of the water of the origin came out, and Gu Youlan's comprehension did not have much effect. She stopped, let Bai Yiyi comprehend first, and entered the passage by herself to begin refining the true element.

Her cultivation had already reached the Great Perfection of the Yuan Infant, and she had already begun to refine the purity of the True Yuan before. The support in the molten cave helps her even more. A day later, the cultivation had dropped to the late Yuan Infant stage, and the True Yuan had already undergone a complete purification.

Stop for a moment and start recovering the liquid in the dantian.

Another day passed, and Cheng Ling's cultivation fell to the middle of the Yuan Infant again. At this time, the liquid in the dantian has changed again, the original liquid is already very pure and transparent, but now it seems that the existence of the liquid is almost unfelt, and the transparency has risen to a new level.

However, at this time, the consumption of pills on Cheng Ling's body was too great. There are less than twenty Xuanyuan Dan left, and it is estimated that the future purification will not be able to replenish in time. As soon as he gritted his teeth, he took out another fifth-level demon beast's inner pill and began to absorb the huge energy in it.

After the first trial, I became much more proficient. As long as you can withstand the energy shock of the previous rounds, you can steadily improve in the future. Moreover, in the molten cavern, the scorching high temperature also greatly improves the efficiency of absorbing the energy of Neidan.

In the scorching heat, most of the impurities in the inner pill were eliminated at the beginning, but the effect was much stronger than that of the pill. Cheng Ling was overjoyed in his heart, the inner pill on his body had an effect, and there were hundreds of fifth-level demon beast inner pills on his body.

Moreover, in the valley before, he killed many Wind Wolf Kings, and he also collected dozens of Nedan. It's just that I don't know if the pills prepared by the two women are enough, if not, do you want to tell them the method of using Neidan?

There are very few opportunities for purification in a molten cave like this, of course, I hope that the two girls can also complete it in the shortest possible time, and their combat power will reach a new level.

At this time, he saw Gu Youlan slowly walking towards him, obviously unable to meet the temperature needs of purification.

Cheng Ling said, "Senior Sister Gu, you come to me." ”

Gu Youlan was stunned for a while, hesitating. To be honest, she really didn't want to get too close to Cheng Ling. After his cultivation was exhausted, he faintly felt that his emotions were more and more affected by Cheng Ling, and he was so agitated several times that he almost vomited blood.

She also knows this

It must have something to do with his own exercises, and after thinking that the matter of the Agni Sect was over, he immediately rushed back to the academy and asked the teacher to help him solve the hidden dangers of the exercises. Later, I saw Cheng Ling and Bai Yiyi talking happily, and subconsciously, I just wanted to stay away from him and no longer sink.

She and Bai Yiyi have grown up together since childhood, they are like sisters, although they have different temperaments, they both regard each other as their own family. care and dependence are not weak, but I really don't want to be mixed between her and Cheng Ling.

Seeing that she didn't move, Cheng Ling secretly wondered, and continued: "Senior Sister Gu, come here, I have something to say to you!"

Gu Youlan sighed secretly and could only walk over.

Before she reached the bulge, Cheng Ling stopped her and said, "Be careful, after this, the scorching temperature is twice as high as before, and the true yuan consumption rate is faster." ”

Gu Youlan was busy stopping, twice the consumption rate, the pills she brought were not enough, and when she was worried, Cheng Ling said again: "I have a way to quickly improve my cultivation, I wonder if Senior Sister Gu is willing to give it a try?"

"What's the solution?"

Cheng Ling flipped his hand, and a demon beast inner pill came out, and said, "Use the huge energy in the demon beast inner pill to improve your cultivation." However, this method is a bit risky, and if it is not grasped properly, it may affect the mind. ”

"Have you tried?"

"Yes, I've tried it twice, and here, the danger is minimized. Because the mixed breath and impurities in the inner dan will be burned by the high temperature, and there is very little left. ”

"Tell me how to cultivate!" Gu Youlan didn't think about it, and said categorically.

Cheng Ling glanced at her appreciatively, and taught her all the methods of using the Demon Beast Neidan. After finishing, he also instructed: "Senior Sister Gu, this method is the most important in the early stage, as long as you carry the first few waves of energy impact, the follow-up will be simple." ”

"This demon pill is the lowest level among the fifth-level demon beasts, you can try it first, and if it is feasible, it will gradually increase. ”

Gu Youlan nodded, took the demon pill, and stepped over the convex point in one step. Sure enough, the temperature here was extremely high, and even her own ice system exercises could not withstand it, the clothes on her body began to gradually become gray, and a large amount of water evaporated.

Sit down cross-legged, and according to the method passed by Cheng Ling, he grabbed Neidan on top of his palms. As soon as the true yuan in the body was injected, a huge amount of energy suddenly surged over, bombarding the dantian. She suddenly "poofed" and squirted out a large mouthful of donated blood, and Zhenyuan mobilized a large number of them to refine the energy in the inner pill.

Cheng Ling was shocked, thinking that she couldn't bear it, so she hurriedly came to her, and with a push of both palms, the true yuan in her body was entered.

Gu Youlan withdrew all her defensive energy into her body, and tried her best to refine the huge energy in the inner pill, and her protective qi was much thinner.

Snort!

The heat in the cavern scorched her protective energy, making a loud noise. Soon, only a thin layer remained, protecting only the flesh.

The clothes on Gu Youlan's body could no longer support it, and in an instant, they turned into flying ash and dissipated into the air, and even the long black hair lost its moisture and became dry and gray!

Bai Yiyi was awakened by Gu Youlan's voice, and hurriedly opened her eyes and looked over. Taken aback, he asked, "Sister Youlan, how are you?"

After speaking, he hurriedly put away the water of origin and ran towards the two of them.

Cheng Ling was in a hurry, and hurriedly shouted: "Don't come here, it's dangerous here."

！”

Bai Yiyi was stunned, stopped a foot away from the two of them, and asked anxiously, "How is Sister Youlan?"

"I'll protect her heart first, don't come here, the temperature here is twice as hot as before!"

Bai Yiyi was helpless, she could only stand on the periphery, she wanted to put on clothes for Gu Youlan, but she didn't dare to disturb Cheng Ling, for a while, I didn't know what to do!

At this time, Cheng Ling couldn't care about this. He injected the true yuan into Gu Youlan's body endlessly, helping her refine the Inner Dan energy. It is very reluctant to speak, and if there is any movement, you must have to go retrograde.

A quarter of an hour later, Gu Youlan eased up and guided Cheng Ling's True Yuan and Inner Dan to refine together. But now, there are three different energies in her body, and their properties are completely different, and it is very difficult to control.

Gu Youlan's own cultivation is ice energy, and the energy in the inner pill is the most huge, which can be regarded as attributeless, and Cheng Ling, after entering the molten cave, in order to resist the high temperature, the true element attribute is biased towards the fire system, and he really doesn't know what kind of attribute he has.

The three strands of energy, ice and fire are bipolar, and the intensity of the two strands of energy is about the same. Neidan has the strongest energy, and he has to balance the three energies for Zhou Tian's operation, how difficult it is, and he can only find the balance point little by little.

Cheng Ling also discovered the condition in her body, and as Zhou Tian carried it, she adjusted the strength of the input true element little by little. Carrying the exercises like this was too consuming of mental power, and in less than a while, Gu Youlan's forehead was covered with a layer of fine beads of sweat, and then her body began to sweat.

Her whole body seemed to be surrounded by water vapor, but as soon as those beads of sweat came out, they were evaporated by the scorching heat in the molten cavern, turning into wisps of green smoke, enveloping the two of them. Fortunately, Cheng Ling's mental strength is strong enough and he can support it.

Bai Yiyi watched the figures of the two of them become more and more blurred, and it was obvious that at the critical moment, her heart moved, and she beat out her own origin water and covered Gu Youlan's body. After a few days of contemplation, her artistic conception of water has reached fifty percent, barely able to withstand the high temperature in the molten cavern.

I don't know how long it took, the true element in Gu Youlan's body finally reached a balance. One ice and one fire, surrounding the huge energy in the middle, slowly carried up. However, the route of this transportation is different, it is not only in Gu Youlan's body.

Through the connection of Ling's hands, the energy is transported between the two people's veins, forming a large cycle from Gu Youlan to Cheng Ling. In this way, the refining speed of energy has increased rapidly, and Cheng Ling's refining ability is much stronger than Gu Youlan.

His Golden Pages Technique was like a big grinding plate, constantly refining the energy that was transmitted. Just by carrying a circle of exercise lines, most of the energy is consumed, and with the help of Gu Youlan's ice energy, the purity of the transformation true element is higher.

After a few laps, the energy in the inner pill was exhausted, and the crisis was finally resolved! Gu Youlan sighed in her heart, she owed him another life, her body had been seen thoroughly, how should she treat each other in the future.

Cheng Ling slowly finished his work, felt the true yuan liquid of the lower dantian, and was happy in his heart. I didn't expect to get a blessing in disguise, just a demon beast inner pill, I filled my true yuan, and my cultivation was about to reach the peak of the late Yuan Infant stage.

He opened his eyes in surprise and said, "Senior Sister Gu, this method is so strong, if I come a few more times, I will soon be able to break through to the consummation of the Yuan Infant!"

It's just that soon, his eyes widened, looking directly at Gu Youlan's body, and he couldn't speak for a long time!