Mu Chen randomly found a place where there was no one, and after setting the ban, Mu Chen began his retreat journey.

In the blink of an eye, two years passed in a hurry, and Mu Chen has been in a state of retreat for these two years.

In a cave, Mu Chen was sitting cross-legged in mid-air, beside him, the golden fighting qi and a trace of green aura were constantly surrounding.

It's just that both the fighting spirit and the aura were slowly sucked into Mu Chen's body, so that the robes on his body were not blown by the breeze.

The next moment, Mu Chen's originally closed eyes suddenly opened suddenly, and at the same time, an invisible wave of qi, with Mu Chen as the center, erupted towards the surroundings, blowing the sand and stones in the cave where Mu Chen was located, and stones fell from time to time on the top of Mu Chen's head, and many stones were directly smashed towards Mu Chen's head.

It's just that when they are about to fall on Mu Chen's body, they will be bounced away by an invisible force.

"I have finally broken through to the Mahayana period, and I am closer to becoming an immortal." After Mu Chen exhaled the turbid breath in his mouth, he said in a low voice.

"Ding Dong, it has been detected that the Heavenly Tribulation is coming, please prepare the host, otherwise you will not survive the Heavenly Tribulation, and it will be wiped out." The voice of the system sounded in Mu Chen's mind.

"Oh? Apocalypse? I really want to see how terrible this Mahayana tribulation is. Mu Chen sneered.

In the next second, Mu Chen's whole person flew directly towards the mountain, with a slight wave of his palm, the mountain stone above Mu Chen's head suddenly burst open, and a large avenue appeared in front of Mu Chen, he was in the middle of the mountain at this time, and he broke through at this time, and he was just ready to go up.

At this time, continuing to go up along the passage, Mu Chen soon flew out of the mountain.

Bang!

Mu Chen had just flown out of the mountain, and a thunderous sound came directly from the sky, Mu Chen looked up, only to see that the sky was covered with dark clouds, and the world was dimmed, like the end of the world.

Looking up, one after another thunderbolts thicker than water pipes kept surging among the clouds, crackling sounds, resounding throughout the sky, looking like fried fat in a pot, ringing non-stop.

Mu Chen could see that the reason why this thunder did not come down was precisely because this thunder was still brewing.

"Is this the tribulation of the Mahayana period, tsk, it really looks 'terrifying'." The corners of Mu Chen's mouth couldn't help but hook up a sneer.

"Host, when you say the word 'scary', if only the corners of your mouth could not smile." Mu Chen's words had just fallen, and the voice of the system sounded in his mind.

Mu Chen was stunned for a moment, when would the system complain to him.

"Host, this system will slowly improve its IQ and EQ with the host's ability." The voice of the system sounded in Mu Chen's mind.

"Improving EQ and IQ? What does that mean? Mu Chen was stunned for a moment, and then asked.

"The host can be understood as the system is more human-like." The system replied.

"Is that so?" Mu Chen nodded suddenly, maybe this is for the cold system before, it may be better to upgrade it.

He has long had enough of the cold system before, and being able to be like a human can be regarded as being able to accompany him invisibly.

"Hehehe...," the system suddenly smiled a little coldly.

Suddenly, Mu Chen noticed a detail, that is, the system said that his EQ was also constantly improving, which means that the system is also constantly evolving?

"Is the host just thinking about it now? As the host enters the more and more powerful planes, the system can absorb more and more energy, and it will naturally evolve, and if the system evolves again, as long as there is enough energy, the system can even repair the space-time tunnel that was destroyed before, so as to return to the world where the host went before. The voice of the system sounded in Mu Chen's mind.

Mu Chen was stunned for a moment, and then ecstatic.

"You're not lying to me, are you?" Mu Chen hurriedly asked.

"Ding-dong, it seems that this system has never deceived the host." The voice of the system sounded in Mu Chen's mind.

Mu Chen nodded thoughtfully, from the time he got the system to now, the system never seemed to have deceived him.

It's just that he can return to the previous plane, and Mu Chen can't help but be unhappy about such a thing, after all, he is also ready to go back, but he didn't expect the system to tell him for sure that the space-time tunnel can be repaired with the upgrade of the system.

Mu Chen and Tu Shan Honghong have not been separated for a few years, and he doesn't miss them very much, but what Mu Chen really misses is Du Qiang Rose in the Jackie Chan Adventures plane, and he hasn't seen her for a long time.

"Ding Dong, please don't think too much about it, does the host remember the subordinate of the Universe Emperor who shot in the space-time tunnel? The system can be sure and certain that he must still be searching for a host all over the world. ”

"Although the host can repair the space-time tunnel, but if you encounter that person again in the process, the host will definitely die, and last time it was because of his carelessness that the system was able to escape with the host."

"But the last escape has exhausted the energy of the system, and before the energy of the system is restored, there will be no way to escape with the host, so the host must face it by itself."

"And the other party is not the real body, just a phantom, if you meet the other party's body, then the host will have no power to resist, the system and the host's soul are bound together, if the other party forcibly separates the system from the host's soul, then the host's soul will be destroyed, so the host needs to improve its strength as soon as possible." The system said to Mu Chen seriously.

After hearing the words of the system, Mu Chen suddenly looked depressed, he originally thought that his strength had improved very quickly, but now the system poured cold water on him, because his strength was still too much worse than the system.

The current Mu Chen, in a word, is still too weak and too weak.

Bang!

At this time, there was a thunderous sound in the sky, which directly pulled Mu Chen back to reality from his thoughts, I don't know why, because of the host's words just now, he inexplicably felt a little upset, and at this time, the heavenly tribulation in the sky suddenly appeared, which made Mu Chen feel very annoyed.

"Get out of here!" Mu Chen suddenly roared angrily, and then the spiritual power in his body suddenly exploded, and in the next second, a huge palm suddenly rose and swung directly towards the Heavenly Tribulation in the sky.