Nie Tian entered the cave and saw that Wu Mei was not in danger, so he followed her to look around, and found that the murals painted on the walls of the cave looked like wars between races.

It was a scene of the black demon with the head of a snake and the creatures of this world, and the black demons were portrayed as heroic, while the creatures of this world were depicted as incomparably brave.

When Nie Tian saw the black demon of the snake-headed human body, he couldn't help but feel a very uncomfortable feeling in his heart, because it was too similar to Xiangliu, the more he looked at the demon full of righteousness, the more uncomfortable Nie Tian's heart became, and after looking at it a little again, Nie Tian finally couldn't help the uncomfortable feeling and withdrew his gaze.

"What does these demons have to do with Xiangliu......" Nie Tian couldn't help but ask himself in his heart.

At this time, the insects outside began to be restless, as if sensing that the blue horned lizard inside was no longer there, and began to swell tentatively inside.

Nie Tian heard the movement, took one last look at the mural that made him uncomfortable, and pulled Wu Mei into the magic painting again.

Nie Tian stood beside the blood pool again, at this time his body had already absorbed a large amount of the energy of the blood pool, and when he looked intently at the countless complex mottled veins on the black rock, these veins suddenly flashed black fluorescence, reflecting each other with the tattoos on his body where the energy in his body was gathered on his body.

Suddenly, the blood pool cracked to both sides, and a passage deep into the black rock appeared at the bottom of the blood pool, and Nie Tian didn't think much about entering the passage with Wu Mei and Hongdan.

While Nie Tian went deep into the passage, he stared at the veins on the black rocks, which were very special, as if forming a large net, enveloping the black rocks in them.

"These lines are so similar to the tattoos on my body, and this pattern has the effect of crossing space, could it be that the tattoos on my body also have this function, but how to apply it?" Nie Tian had a bold idea in his heart.

In his opinion, the lines on the black rock are likely to be arranged as a spatial device, which opens up a new space in the mural.

"There are all kinds of wonders in the world, and things that we don't understand can't be arbitrarily classified as superstition." Nie Tian sighed slightly, didn't think much about it, and concentrated on walking along the black passage.

The black rock passage is circular and spacious, first going down a distance of more than ten meters, and then sloping upward.

Nie Tian walked in the passage with a steep slope, and the more he walked, the more he felt that this passage was a little weird, which didn't feel like it was for people to walk, but it was convenient for the monster with the snake body to pass through.

"Could it all be that the snake people on the mural built it?" Nie Tian didn't think about it at all, and instinctively jumped out of this answer in his mind.

Going all the way up along the black rock passage, when Nie Tian had advanced for nearly a hundred meters, he found that the passage had finally become gentle.

"Whoa! Whoa! Whoa......"

At the end of the passage in front of him, a waterfall rushed down, and I don't know how deep it fell, just blocking the exit of the passage.

Nie Tian was no longer surprised, he still moved forward cautiously, and when he walked about forty meters, he finally reached the end of the passage.

The two leaned over and looked down, and Wu Mei took a few steps back, for fear of falling into the abyss that could not be seen in front of them. She could imagine the water falling into the abyss, but she couldn't hear the sound of it colliding with objects below the ground.

Wu Mei's mind flashed through how high this canyon was, and she couldn't hear any sound of the waterfall falling to the very bottom.

When she looked up through the gap in the waterfall, she found that there was a vast space in front of her, which was extremely open, like a place out of the world.

"Here, it's an underground world again?" Wu Mei couldn't help but look at the distance.

"Sure enough, this is an underground world, is this the residence of the snake-headed demon?" Nie Tian said to Wu Mei.

As soon as Nie Tian said this, a chill suddenly came from his back, only to feel a cool breeze coming, he didn't have time to think about it, and directly dodged with a backflip.

"Bang!"

I saw a giant horned lizard more than two meters long, almost the same color as the rock, falling from the top of the passage and slamming heavily on the black rock ground.

This giant horned lizard Nie Tian is very familiar with, it should be the one he saw not long ago, but why did the blue turn black, Nie Tian flashed the answer in his mind, it was a chameleon.

When Nie Tian saw the giant horned lizard looking at him, it didn't look like he was about to attack, and he moved his body to the side, thinking that it wanted to go out.

And the head of the giant horned lizard turned around, looking at Nie Tian, and then at the end of the passage, as if to tell him to go over there.

Nie Tian was slightly stunned, he had the experience of the big yellow dog, of course he could understand the meaning of the giant horned lizard, but now he didn't know whether the other party was friend or foe, and he didn't want to venture in.

And the end of the passage is connected to an abyss that I don't know how deep, once he accidentally falls, the consequences are unimaginable, and with Wu Mei, he doesn't want her to take risks.

Therefore, no matter how the giant horned lizard signaled and how it made various humanized expressions, Nie Tian just couldn't insist on taking the first half a step.

At this time, Wu Mei watched Nie Tian constantly shake her head at the giant horned lizard, and understood what was going on, as soon as she thought that the end of the passage was connected to the bottomless abyss, her heart was cold, and she couldn't help but tremble a little under her feet, and retreated again and again.

Nie Tian knew that the giant horned lizard was good at climbing on the rock wall, and he and Wu Mei, as human beings, were playing acrobatics on this cliff, and such a 'difficult' action could fall down at any moment.

Seeing that Nie Tian was indifferent, and had the intention of retreating, the giant blue horned lizard immediately showed a furious look.

It actually opened its mouth, bared its sharp teeth and shouted at Nie Tian, "Hiss", this voice is an obvious threat, as if to say that you don't listen to me and you look good.

Nie Tian heard the threatening sound of the giant horned lizard, did not advance but retreated, and with a whoosh, he immediately turned and pulled Wu Mei towards the passage where he came.

"Whoosh~"

Almost when Nie Tiancai rushed out more than ten meters, the giant blue horned lizard came first and appeared in front of them, blocking his way.

The giant blue horned lizard stopped Nie Tian and let out a threatening cry again, "Hiss". Looking at its posture, it is very likely that Nie Tian will not comply, as if he wants to attack him.

Wu Mei and Hong Dan felt nervous for a while, feeling that the current situation might be very dangerous, but Nie Tian was still calm.

The giant gecko looked at Nie Tian's appearance and let out a deafening threatening cry, as if it was giving Nie Tian an ultimatum to give Nie Tian one last chance to choose.

Nie Tian is now a character who has killed Bai Yan, naturally he will not give in easily, he is confident that he will solve the guy in front of him, and he is ready for a big battle at the moment.

"Whew!"

Nie Tian learned that the white cockroach used all the power of the dragon pill and also let out a threatening cry, indicating that he was not a character to be messed with.

This giant horned lizard seemed to be able to understand the meaning of Nie Tian's cry.

Nie Tian didn't make a sound, but his cry was obviously a provocation to the giant horned lizard, which made the giant horned lizard Renkeren, completely enraged by Nie Tian, and shot directly, and a big claw slapped directly towards Nie Tian's head.