After thinking for a while, he cautiously entered the cave and cautiously walked deeper into the cave.

The cave was not very wide, only more than six feet high and wide, and the darkness inside made it feel a little oppressive.

After walking for about 100 feet, we have reached the end of the cave.

Zhang Xuan saw that this end was actually not the end in the usual sense, the cave wall at the end was shiny, soft and not collapsed, and even gently drummed. In the middle of the cave wall is a slender and vertical opening, the upper and lower ends of the opening are slightly thinner, and the middle part is slightly thicker, releasing a strong mist outward.

He sensed that the Langya Sword was about a foot or so in this opening.

The Gu Demon Leader who was not expected here had this strange opening, which made Zhang Xuan a little confused.

However, since he came, since the Langya Sword was inside, there was no reason why he didn't go in.

So, after a little hesitation, he stepped into the opening decisively.

Unexpectedly, when he stepped in, the opening behind him closed silently, sealing him all at once.

Seeing this, he shook his head slightly, and then observed the situation in this enclosed space, and found that there was nothing strange about it, except for the gray mist emitting outward from every corner.

These gray mist, the same smell as those miasma outside, are a kind of witch energy.

In the face of such energy, Zhang Xuan was not afraid, and absorbed it boldly with confidence.

So, he sat next to the Langya sword and absorbed the energy here recklessly.

Turning his head to look at Langya Jian, he couldn't help but smile.

This Langya sword looks inferior to ordinary swords, but it has strange magical powers that ordinary people can hardly imagine, and there are some great gods hidden in it, and it has also accompanied Zhang Xuan in the southern and northern battles, absorbing a lot of energy. If it hadn't lost the two great gods of Heaven-Shaking Gong Ma Ben and Heaven-Shattering Star Tour one after another, its strength would be much stronger than it is now.

Because of this, it urgently needed to absorb energy quickly to replenish the energy it had lost, so when it smelled the rich witch breath in this cave, it plunged into this place and absorbed the energy here.

For it, this was an instinctive reaction to rush to strengthen itself, and in order to strengthen itself, it even ignored the existing rules of returning to Zhang Xuan's side regularly.

At present, the rules have become a floating cloud.

Zhang Xuan understood the thoughts of the great gods, and he didn't care about their violation of the rules. On the contrary, he hoped that the great gods in Langya's sword would recover as soon as possible so that they could provide him with greater assistance.

The road ahead is dangerous, and he needs this kind of help.

The growth rate of the big demons is very fast, even if he grows with the big demons, he may not be able to kill all the big demons smoothly, not to mention that there are other demons and monsters besides the big demons, he must grow faster than the big demons.

For example, these Gu demons in Tuanshan were not on the Hundred Demon Spectrum, and they were not in his extermination plan, but he had to work hard to exterminate them. There may be many more such accidents in the future, and the danger he faces is bound to be even greater.

Absorbing the witch Gu energy here without stopping was a means to propel him to grow stronger, and he wanted to absorb as much as he could.

However, half a day later, he couldn't stop.

Suddenly, he felt that he was hit by something in his back, and when he turned his head, it turned out to be a freshly baked Gu demon!

This Gu demon who had just emerged from the cave wall, his body had not yet been completely condensed, and a pair of sneaky eyes stared at Zhang Xuan with a pair of sneaky eyes, as if he was a little afraid.

Zhang Xuan reacted very quickly, and without waiting for the Gu demon to react, he immediately grabbed it and threw it into Xiao Qiankun.

As soon as the Gu demon entered the small Qiankun, he was attracted by the Happy Lotus, and his body exploded immediately, turning into pieces of fine flesh and blood, and at the same time, a cloud of light smoke came out, which was absorbed by the Happy Lotus.

In the next time, Gu demons of different shapes appeared one after another from the cave wall, all of which were concocted by Zhang Xuan in the same way, thrown into Xiao Qiankun, and absorbed by Happy Lotus.

Only then did Zhang Xuan realize that this closed cave was originally the source of the Gu Demon, and it could also be said to be the source of ten thousand Gu. The other side of it should be connected to mountains, rivers, land, rivers, lakes and seas, from where some creatures with witch qualifications can be absorbed, and they will be initially nurtured before they enter this cave, and then continue to be transported here until they become mature Gu demons, and finally release them to become demons.

This one-stop-like process of gestation and transportation is carried out step by step with this cave as the center.

From this point of view, the power of the witch Gu in this cave actually contains a powerful power of conception and transformation, which is completely different from the power of those witch Gu outside.

For him and Langya Sword, absorbing the power of the witch Gu with this trait would have a greater tonic effect.

Thanks to the fact that he came at the right time, he discovered this source of ten thousand Gu in time, otherwise, this source of ten thousand Gu would have given birth to countless Gu demons, and this world would become a witch world full of Gu demons.

He continued to throw the Gu demons that emerged from the cave wall into the small Qiankun, some of them were overwhelmed, and his arms were a little sore, so he had to release the anteater and let it help clean up those Gu demons.

While helping Zhang Xuan, the anteater asked, "Master, this place looks unusual, how did you find it?" ”

Zhang Xuan reprimanded: "As soon as I heard you ask this, Lao Tzu wanted to beat you up!" There's such a weird thing here, why didn't you report it beforehand? Are you planning to hide your own inglorious experience of becoming a demon? ”

The anteater replied with a wry smile: "Master, you have wronged the slave by saying so!" The attitude of the minion in front of you has always been to know everything and say everything, what you ask, the minion will answer, where did you think that there is such a question? ”

"Hmph, you guy, you're still fighting with Lao Tzu at this time!" Zhang Xuan reprimanded, "Let me ask you, where were you sucked here in the first place?" ”

The anteater pondered and replied honestly: "The slave was digging an ant's nest on a hillside in Mt. Mishan, when he suddenly felt a shock to his head, and then sensed a call from here, so he ran here unconsciously. When I came to the back mountain, I went into a cave, where I fainted, and then somehow I entered this cave, and I felt as if I had shed a layer of skin, and my whole body was weak and sore, and it took many months before I gradually became stronger. ”

After listening to what the anteater said, Zhang Xuan had a further understanding of the operation of the source of ten thousand Gu, and expected that the bones of many living beings were piled up in the cave behind him, so he planned to go over and take a look after absorbing the energy here.

Before killing the Great Demon of Yin Mountain, he had seen the bones of many living beings, and if he saw the bones of those living beings who had been killed by the Source of Ten Thousand Gu again, he didn't know if he would be surprised.

The source of ten thousand Gu that can give birth to many Gu demons, the energy in it is extremely abundant, and it seems to have a steady stream of replenishment, Zhang Xuan still didn't feel any signs of weakening after absorbing it for three or four days, so he took out the flower stick and pestled it on the cave wall, so that it could also help absorb the witch Gu energy.

Seven or eight days later, the energy in the source of ten thousand Gu began to show signs of weakening, and the frequency of the appearance of the Gu demons that gradually surged out also began to decrease.

The anteater was tired enough, but it was still busy.

Seeing this, Zhang Xuan opened his mouth and said, "You go to Xiaoqiankun to rest for a while, and then come out to work after you recover a little!" ”