Passing through the lush trees, a cave is adjacent to a valley stream, and the water on the mountain is like a green dragon descending gracefully, clinging to the steep and damp rock wall, the water splashes, and turns into countless water mist in the air to cover the cave below, and occasionally iridescent colors stand on the cave under the sunlight.

Cheng Xing chose this place as a hiding place, the picture is the mist of this small waterfall, in the field of vision of ordinary people, it is difficult to see that there is a cave hidden behind, and only people with strong soul perception like Cheng Xing can find it.

After entering the cave, Cheng Xing set up several small mechanisms, once something broke in, he would be able to know it as soon as possible, after all, when cultivating, the attention was mainly in the body.

After doing this, Cheng Xing sat on the clean stone platform, clicked on the system panel, and took out all the magic cores accumulated before, intending to absorb them all in one go.

Looking at the few small red dots jumping on the panel, it was quite in the way, and when I clicked in, I found that the news of the two genius treasures had not been received yet, and now I didn't have time to care about these, so I closed the panel directly, intending to absorb the magic core.

Cheng Xing looked at the magic cores of different sizes in his hand, and did not hesitate, grabbed a handful, clicked on the refining of the system panel, and threw it into it.

The magic cores of different colors turned into a mottled streamer and disappeared on the illusory operation panel.

After only a few breaths, the Dou Qi in Cheng Xing's body began to run wildly, and where the original demon core disappeared, a wisp of thick and pure Dou Qi appeared, which was frantically absorbed by the Dou Qi Cyclone, and with the entry of this pure Dou Qi into the body, the speed of the cyclone was also rising rapidly, and the volume was obviously expanding.

Feeling the rapid growth of the cyclone, all the cells in Cheng Xing's body were greedily absorbing the fighting energy.

The pure energy of this demon core only lasted for more than three hours before it ended.

"It seems that the energy required for each level is also different, so many demon cores have been absorbed, and there is still half the distance to the four-star fighter."

Cheng Xing slowly opened his eyes, looked at the magic core on the system panel that was about to exhaust the last trace of energy, sighed, and then put another magic core into the refining area.

Today's goal is to absorb this pile of demon cores, as long as you reach the five-star fighter, it will not be too difficult to hunt second-order demonic beasts, otherwise it will be too difficult to advance with the power of first-order demon cores alone.

With a large amount of demon cores put into refining, the pure Dou Qi appeared in front of him again, with the foreshadowing in front of him, this small pile went down, and the Dou Qi in Cheng Xing's body also began to collapse, and with the reshaping of the cyclone, the strength also reached the four-star Dou Dou.

And his goal is not as simple as four stars!

In the following time, Cheng Xing kept absorbing the fighting qi refined from the demon core.

In just over two days, more than 50 magic cores helped Cheng Xing leap from a three-star fighter to a five-star fighter, thanks to the purity of energy and the subtlety of the exercises, now his strength can compete with a nine-star fighter, and even a strong fighter!

"Whew, it's been almost three days, and I'm finally done absorbing it."

Cheng Xing stood up, spit out a ball of pure fighting energy from his mouth, twisted his waist, moved his muscles and bones, and his bones crackled, which was really comfortable.

With a flip of the palm, a fighting skill appeared in the palm of the hand.

"Ben Thunder Jue, Xuan Rank Advanced Fighting Technique, this fighting skill is as powerful as the thunder and lightning in the Nine Heavens and Clouds, containing a trace of the power of Heaven and Earth Xuan Thunder, cultivators need to choose carefully, once the origin is injured by the Heaven and Earth Xuan Thunder, the gains outweigh the losses, remember to remember."

Cheng Xing looked at the introduction in front of the fighting technique, and was a little puzzled, the thunder and lightning between heaven and earth are just the discharge phenomenon after the friction of the clouds, how can it have this kind of power, and it is not the Dan Lei that is associated with the Seven Rank Pill.

With the intention of continuing to read, Cheng Xing put the fighting skills into the interface of the system scanning, and one message after another was read.

[Running Thunder Jue, using the thunder and lightning factors scattered between heaven and earth, condensed to kill and injure the enemy, is a simplified version of the intermediate fighting skill of the ground level - the heavenly thunder galloping, which requires a cultivator's high sensitivity to perceive, and then gradually control the opportunity to generate thunder and lightning around him, absorb energy, and release thunder and lightning. 】

Looking at the introduction of the exercises, Cheng Xing smiled slightly, and threw it directly into the refining area.

"System, refining the Xuan-level advanced fighting technique Ben Lei Jue."

With Cheng Xing's order, the exercise turned into a black lightning bolt and shot directly at Cheng Xing.

Cheng Xing's originally standing body was directly knocked down by this black lightning.

A tingling energy spread from his chest to his whole body, and Cheng Xing wanted to stand up, but his muscles no longer obeyed.

[System Prompt: Please ask the host to refine the power of Xuan Thunder in time.] 】

The prompt voice of the system in his mind was a little inaudible, and Cheng Xing could only forcibly cheer up his spirit and urge the fighting qi in his body to catch the power of this Xuan Thunder.

Fortunately, he had just been promoted to a five-star fighter, and he was in full condition, and under the consumption of a few hours, although Cheng Xing was sweating profusely, there was green smoke on his head, and even his hair stood upright, but fortunately, he was able to suppress the power of Xuanlei without danger.

The mind sank into the body, only to see a hair-thick black lightning, hovering near the Douzhi cyclone, facing this circular void that exuded a huge aura, although this lightning did not have consciousness, but did not rush in, but wandered around, not a few wisps of fighting qi passing by on the side of the electricity.

[System Prompt: Tonight will be a thunderstorm, and the host can draw thunder and lightning from heaven and earth to strengthen its own thunder and lightning attributes, and refine the power of Xuan Thunder. 】

Sitting up straight, Cheng Xing immediately meditated and entered a state of cultivation to recover the fighting energy he had just consumed.

On the system panel that emitted light in front of him, dark clouds were gathering, and the sound of lightning came from time to time.

Outside the cave, the originally clear sky was gradually overcast, and the thunderstorm clouds drifting from the northeast gradually covered the scorching sun.

Soon after, the endless thunder sounded, also reminding Cheng Xing that it was time.

Opening his eyes, a trace of black light flashed under his eyes, Cheng Xing riveted his strength, and ran towards the outside of the cave, and then stepped on his feet suddenly, and the huge momentum exploded the ground at the entrance of the cave, and with the help of the reverse thrust, his body shot straight into the sky, and then activated the purple cloud wings in the heavy rain, and flew towards the nearest peak.

The majestic rain ravaged the forest to the fullest, the strong wind howled, and forcibly changed the path of Cheng Xing in flight several times, and some flying monsters who didn't have time to find shelter flew to the forest at the lower level, not to the mountain peaks, because this thunder hit the high place, flying up, and it was a trouble to encounter a lightning strike.

But Cheng Xing, what he wants is this lightning strike, the bigger the thunder, the more he likes it!

[System Tips: The risk factor of this lightning strike is high, please attach great importance to the host!] 】

Listening to the system prompt that was covered by the sound of rain, Cheng Xing also felt a trace of palpitations, the rain crackled and poured on his face, which was really heavier than the rain on the day Yiping asked his father for money.