The giant horned lizard gently rested its sharp teeth on Nie Tian's skull, and it was obvious that the giant horned lizard was just tempting, but this kind of temptation was too terrifying.

Nie Tian was still as steady as a rock at this juncture, but fortunately, the giant horned lizard quickly let go of his head, then bit his backpack and walked towards the end of the passage with his body step by step.

Originally, he planned to buy a little time, and he could quickly gather the power of the dragon pill again and fight the giant horned lizard.

What he didn't expect was that after the power of the dragon pill was scattered dozens of times at this time, most of those dragon pill powers had been integrated into the flesh and blood and meridians of the whole body, and were used by the body to recover from injuries.

And in the current dantian, the power of the remaining dragon pill is very small, and it is not enough to deal with the giant horned lizard.

Nie Tian couldn't imagine the consequences of being taken to the end of the passage and falling into the bottomless abyss, and most importantly, there was Wu Mei, if there was no protection from herself, would Wu Mei be able to survive in this world alone?

The giant horned lizard bit Nie Tian's backpack and led him forward, breathing evenly and breathing for a long time, obviously in good condition, just in the blink of an eye, it took Nie Tian to the end of the passage.

As soon as the giant horned lizard's mouth loosened, Nie Tian fell into the bottomless abyss with the waterfall, Wu Mei, who arrived at this time, saw this, without the slightest hesitation, and followed the leap into the waterfall, she couldn't help the fear in her heart, and let out a terrible scream.

Hong Dan was stunned for a moment, and after a sigh, he also jumped down.

Nie Tian felt the flowing water falling with him around him, barely opened his eyes, and saw that this waterfall was very strange, as if it was wrapped in a transparent pipe by invisible energy, when the water was rushing down, the outside space kept changing shapes, these shapes were strange, they seemed to overlap but were independent, like each other's shadows.

And when the water flow fell to the bottom, Nie Tian felt that he was squeezed by the water and pushed upward, without falling to the ground and shattering his bones, until he was sprayed into the sky by the water flow, and then fell into a lake.

"Bang!"

With a loud bang, Nie Tian's body slammed into the pool of waves, and at the same time, several black wolf-headed fish with a length of several meters were frightened and fled into the distance.

When they saw Nie Tian in the deep pool, they swam swiftly.

These black-headed fish are a little slender, covered in scales, glowing with cold light, and have fangs in their mouths, looking like demons in the water.

A three-meter-long black sengtou fish was more than forty centimeters thick, rushing to the front, it opened its huge mouth, revealing its dense fangs, and bit towards Nie Tian, who was a little dazed.

The big fish was dumbfounded for a moment, it found that its strong teeth couldn't bite Nie Tian's body, and it instantly became furious, and its tail pumped Nie Tian out.

This big fish abandoned Nie Tian, and the remaining smaller black sengtou fish dared to step forward and tried on Nie Tian's body one by one, but they were all helpless to defend Nie Tian's scales, and they all gave up Nie Tian's idea of using it as food.

At the same time, with two "bangs", Wu Mei and Hong Dan fell into the lake, Nie Tian just relieved himself, quickly swam towards Wu Mei, and arrived in front of the black seng head fish, blocking the attack of the swift wolf head fish on Wu Mei.

"I happen to be hungry, since you sent it to the door, then I'm welcome!" Nie Tian thought in his heart, grabbed one of the fangs of the largest wolf-headed fish, and broke the fangs with one force.

When the other small fish saw it, they stopped one after another and did not dare to step forward.

Nie Tian pulled out his sharp blade and pierced it into the body of the black sengtou fish.

The fish scale defense of the black sengtou fish was like tofu to Bishou, who was blessed by Nie Tian with the power of the Dragon Pill, and it was directly pierced at the moment.

The black sengtou fish was in pain, struggled violently, kept rolling, and hit the lake "Bang la!" Bang la la......" But how could it break free, and for a while, the bloody smell continued to flow out of its wounds.

But the strength of the black sengtou fish is very huge, and Nie Tian has just been crushed by the giant horned lizard, and his body is a little prostration, he can't hold this big fish at once, and he is carried by the wolf head fish to constantly play on the surface of the lake, and after a lot of time, the black sengtou fish has lost its strength, until the blood of the black sengtou fish has almost dried up, and finally it gradually loses its vitality.

Just when Nie Tian thought that victory had come and was about to beckon Wu Mei to come ashore, several larger fish, attracted by the smell of blood, had already swam to Nie Tian's side.

These big fish greedily bit at the carcass of the slain black seng fish, and they kept pulling and shaking their bodies violently, frantically eating the flesh of the slain wolf head fish.

Seeing that the lake was too dangerous, Nie Tian was worried about Wu Mei's safety, so he gave up the food he had, swam back to Wu Mei's side, and took her ashore with him.

It was still dark here, but fortunately, with the help of his powerful night vision, Nie Tian was still able to see the scene in front of him clearly.

In front of Nie Tian's eyes was a gray-toned world, just now fell into a deep pool that was not too big, from the center of the deep pool there was a fountain, gushing ten meters high and then falling into the deep pool, stirring up countless splashes, making the surface of the deep pool look like huge fluctuations.

The space beyond the deep pool is devoid of any vitality, quiet and dark, like an eternal dead silence.

Nie Tian looked at the huge fountain and understood that he was spewing out of there, but he couldn't figure it out for a moment, obviously he had fallen to the bottom, why he was brought here by this fountain again for some reason.

After a while, he remembered the U-shaped passage of the Klein bottle structure in the underground round tower, and suddenly realized that it was the same way that this waterfall flowed. If that was the case, Nie Tian would have wanted to go back to the passage where he had fallen, but now it would be almost impossible.

Nie Tian reluctantly took Wu Mei out of the deep pool and kept moving forward until he came to a desolate desert.

There is no grass in the desert, even the breath of life can not be sensed, in the dim desert, faintly can be seen a few hundred meters away, there seems to be a very majestic palace.

The palace could not be seen in the gray space, and its size could be inferred from its outline.

"Is that a palace?" Nie Tianxin asked suspiciously, there was such a magnificent palace in this underground world.

The farther away was temporarily unseeable, shrouded in fog, and I didn't know where it would go.

"Rustling ......" stepped on the sand of the desert, and a cool breeze blew, rolling up a large area of yellow sand, enveloping Nie Tian and them.

When the cool breeze disappeared with the yellow sand, the palace in front of it disappeared strangely.

Nie Tian rubbed his eyes, and even flashed a dazzling golden light, but that palace just disappeared, disappearing for no reason, extremely weird.

"Hallucinations? Mirage? Nie Tian stopped and thought to himself.

The wind stopped, the yellow sand gradually quieted down, and as far as his eyes could see, there was nothing, only the misty and unclear space in the distance, full of mystery and unknown.

It's as if everything that just appeared was just a bubble phantom.

Nie Tian looked up at the sky and found that the sky was also misty, not dark, but a little dim, and that feeling was like dusk.

In fact, this space is always in such a state that the sky does not seem to be much brighter than the ground space.

After a little silence, Nie Tian pulled Wu Mei and continued to move forward, heading in the direction of the palace he had just seen. 21