After Xiao Yan agreed, Mu Chen didn't say anything more, and directly began to upgrade the demon mask, the higher the strength, the more Mu Chen could feel the powerful power in the Panku treasure box.

Mu Chen even suspected that this thing was not something that should be in the plane of Jackie Chan Adventures at all, because the energy contained in this thing was too great.

As Mu Chen extracted and transformed the energy in it, and then directly entered the body of the demon mask, the strengthening of the demon mask also began, Xiao Yan naturally watched quietly from the sidelines, not daring to speak at all.

Three days passed in the blink of an eye, Mu Chen sat cross-legged at the bottom of the valley, beside him, Xiao Yan's soul and thousands of soul balls, and in front of Mu Chen, there was a black mask suspended in the air.

At this time, the mask has changed its appearance, and the appearance of the demon mask before is no different from that of evil ghosts, and it is slightly funny.

However, at this time, the demon mask has completely turned into a black iron mask, and the black surface is angular, without the appearance of the previous evil ghost.

If the previous mask was the appearance of a demon, then the current mask is no different from a fierce god.

The bright black face, like a god, was sacred and majestic, but it exuded endless dark power.

It looks very strange, but it's more likely to be scared and awe-inspired.

People are generally very afraid of ghosts, but they are generally afraid of gods and the like.

On the forehead of the mask, there is also a raised golden bead, and if you don't look closely, you will think that it is an eye.

And the golden beads are the Panku treasure box, or the Pangu stone stored in the Panku treasure box.

The Panku Treasure Box can only be regarded as a box containing Pangu Stones, and it is the Pangu Stones stored in it that are working magically and possessing endless energy.

It was precisely because Mu Chen wanted to integrate the Pangu Stone into the demon mask that he would spend three days and three nights.

In addition to these changes in the mask, the demonic energy contained in the demon mask has also become very terrifying.

Compared to the previous demon mask, it was more than a thousand times more, after all, Mu Chen directly planned to use the demon mask to suppress those soul bodies.

If the body of the demon mask is not strong enough, it will not be able to suppress it, so in order to maintain the stability of the mask, Mu Chen will choose to integrate the Panku treasure box and the demon mask.

It's just that even with the fusion of Pangu Stone, the Demon Mask is still a very evil item.

Under this heaven and earth, it is estimated that only Mu Chen can wear it, and if others dare to wear it, they will definitely be bewitched by the consciousness power of the mask itself, so as to turn into a puppet of the mask, be manipulated by the mask, and become a real demon.

But Mu Chen is a person who is not afraid of this at all, because for the mask, Mu Chen is its fearful existence, and Mu Chen is its master and its creator.

This evolution of the mask can be said to be reborn, and Mu Chen is the one who created it, for Mu Chen, who can create it, it is born with a trace of fear of Mu Chen, and with the fear in his heart, the demon mask does not dare to do anything to Mu Chen.

What's more, Mu Chen's consciousness is very identified, and his spiritual power is even more terrifying in Yichang, even if the demon mask wants to bewitch Mu Chen, there is no way to bewitch him, so it can only choose to surrender.

It's just that even so, Mu Chen is still a little uneasy about the mask itself, which is why Mu Chen made Xiao Yan into an instrument spirit.

As long as Xiao Yan becomes the instrument spirit of the mask, then Xiao Yan can compete with the consciousness of the mask itself, with the help of Mu Chen, it is not too difficult for Xiao Yan to suppress the consciousness of the mask.

And in this way, the consciousness of the demon mask can also lose the opportunity to guide people's hearts, so that Mu Chen can completely relax his mind, and even lend the mask to others to use.

It's just that now is not the time to think about these questions, now that the mask has been successfully promoted, what Mu Chen has to do now is to seal Xiao Yan's soul into the mask together with the souls of those guys in the Soul Palace.

"Xiao Yan." Mu Chen shouted.

"Master, I'm here." Hearing Mu Chen shouting to himself, Xiao Yan hurriedly shouted respectfully.

"I'm going to pass on to you a recipe for devouring spirits, after you enter the mask, you will devour all the souls inside the mask, and I will help you outside." Mu Chen said.

"Disciple understands." Xiao Yan nodded hurriedly and said.

When Xiao Yan decided to make himself a machine spirit, he was already mentally prepared, since he was going to leave the Douqi Continent, then he had to make a complete break with the Douqi Continent, don't think about anything, just do things, Mu Chen asked him to do things, then he would do it.

Anyway, Mu Chen is his teacher and will not harm him, he chooses to believe Mu Chen.

Mu Chen nodded, and lightly touched Xiao Yan in the air, and a white light suddenly shot out of Mu Chen's hand and disappeared into Xiao Yan's forehead.

Xiao Yan suddenly found that there were some more memories in his mind that did not belong to him.

"Soul Swallowing??" When Xiao Yan learned about the power of the Spirit Devouring Technique, his heart was suddenly overjoyed.

The Soul Devouring Technique can be said to be a technique that is completely tailored for a soul body like him, because as long as this technique devours the soul, it can become more powerful, just like a big fish eating a small fish.

"Alright, you can go in and eat all the guys inside." Mu Chen commanded.

"Yes." After Xiao Yan agreed, the whole person flew directly into the demon mask, and then the void disappeared directly into the mask.

And the soul sealed in the mask is naturally the ninja force sealed in by the demon mask, although the strength of those guys is very strong, but in front of Xiao Yan, it is not enough to see at all, and those guys are at most the strength of the fighting master.

As for them attacking Xiao Yan, Mu Chen was not afraid at all, because Mu Chen could suppress them with the help of the power of the mask.

Now that Mu Chen has thousands of soul bodies with the combat power of the Dou King, there is no need for the demon soldiers in the original mask to continue to exist, because their strength is too weak.

Natural selection, survival of the fittest, survival of the winner, this is the eternal law of nature, if you don't have the strength, you can only wait for death.