Originally, in a very strange place like Fire Demon Valley, there was a cave that emitted red light, which was not a special thing. When most people see it, they are just amazed, and they don't delve into the reason. Just because this is the outer layer of the Fire Demon Valley, every time the Fire Demon Valley opens, there are a large number of people lingering in this outer layer, even if there are any treasures, they have already been picked up, how can they be left?

People think the same way, so although this red light is a little weird, no one cares. Instead of wasting time searching, it is better to enter the middle layer as much as possible, maybe you will be the first to get there, and when others are not coming, you will touch a few treasures first.

Nie Fei didn't know much about this Fire Demon Valley, so he was attracted by this red light. If he had a deeper understanding of this Fire Demon Valley like others, maybe he wouldn't have cared when he saw this red light.

Nie Fei looked at the entrance of the cave for a moment, bent down, and plunged into the cave.

The cave was pitch black, and nothing could be seen. This is not difficult for Nie Fei, there are many treasures in his storage bag, and one of them can emit a piece of clear light.

Nie Fei lifted the bead and walked towards the depths of the cave. When the cave got inside, it became more and more spacious, and by the end, Nie Fei could already straighten his waist.

However, to Nie Fei's disappointment, he searched the entire cave and found nothing unusual.

Just then, Nie Fei hears Fluttershy's screams and walks out of the cave and rushes back to save Fluttershy.

After saving Fluttershy, Nie Fei thought that it would be a hassle to bring such a weak teammate, so he frowned and decided to go alone. As for whether Feng Xiaodie will be in any danger after he leaves Fluttershy, Nie Fei doesn't care about that at all. When Fluttershy is in front of him, he sees that Fluttershy is in danger, so he naturally wants to come to his rescue. But Fluttershy is not in front of her, out of sight is clean, who cares if she is in danger or not?

After saying goodbye to Fluttershy, Nie Fei rushes back to the cave. At this time, he was very puzzled in his heart, the cave was obviously an ordinary cave, and there was nothing special about it, but he also clearly saw the red light. Suddenly, Nie Fei's eyes lit up, and he secretly said in his heart: This cave must be strange, and the strangeness lies in the fact that this cave is too ordinary. It must be using this ordinariness to cover up something.

Thinking of this, Nie Fei's confidence increased, and he began to search in the cave. He knocked east and west, hoping to find some clues. I worked all day to find anything noteworthy.

Nie Fei sat on the ground, he was not tired. This whole day's work was not a big deal at all for his cultivation of the sixth layer of qi refining, but in fact, it was close to the eighth layer of qi refining. The main thing is that he found nothing in his search this day, and he couldn't help but be a little discouraged.

But Nie Fei trusted his judgment very much, he stood up suddenly, and shouted, "Where is it?" and then slapped his palms, and a cold air instantly filled the entire cave.

Nie Fei did this, not a mad attack, venting without any scruples. Rather, he thought that if there was any hidden opening in this cave, although the eyes could not see, the air flow would flow normally. That's why he casts a chill to observe the changes.

Nie Fei looked around carefully, and saw that the cold air was very dignified, and there was no flow, so he couldn't help but be a little disappointed. At this time, Nie Fei still firmly believed that his previous judgment must be correct, and he never wavered in this. And he didn't find anything special, he just didn't find a way.

......

At this moment, Nie Fei suddenly saw that the cold air in one place had changed. Nie Fei walked up and observed for a while. I saw that the cold air in that place first slowly rose upward, and after rising to a certain height, it slowly fell from both sides. This process is extremely slow, but it is undoubtedly a change.

In fact, this kind of change, Nie Fei is no longer familiar with, this is called convection, which is generally caused by temperature differences. The most noticeable change is in the depths of the cave near the ground.

Nie Fei stepped forward and observed the ground, only to see that the ground was made of rocks, and he couldn't see anything special at all. Nie Fei reached out and pressed his palm towards the ground, staying on it for a moment, then pressing the ground around him, and then pressing it on the ground again.

After repeating this for a long time, Nie Fei stood up with a smile on his face. It turned out that under his investigation, he found that the temperature of the ground there was indeed much higher than the temperature in other places. And after exploring, Nie Fei also found that the ground with high temperature was three feet square.

"Hmph, it's really weird, no matter how well you hide it, haven't you been found out by me?" Nie Fei raised his palm, used his aura, and slapped it down to the ground.

But the aura in his palm had not yet touched the ground, and the mutation was abrupt. I saw that the ground suddenly cracked silently, revealing a hole three feet square. At the same time, Nie Fei also felt a wave of heat rushing out of the hole. The heat was extremely strong, and Nie Fei saw that the tips of his hair had slowly curled.

Nie Fei didn't dare to slack off, and as soon as the cold air turned around, the heat disappeared when he landed, and he could no longer pose a threat to Nie Fei.

Nie Fei looked at the entrance of the cave, and saw that the entrance of the cave was dark and secluded, and there seemed to be some red light, but it was not clear what the situation was inside. Nie Fei watched for a long time, gritted his teeth, jumped into the cave with a straight body, and decisively jumped into the hole.

......

At the moment when Nie Fei jumped into the entrance of the cave, the magma in the belly of the inner mountain of the Fire Demon Valley surged up, and the fire spirit emerged from the magma. It was like the light of its eyes, staring at the direction where Nie Fei was, and suddenly opened its mouth and screamed strangely.

Its strange cry was clearly heard by everyone in the Fire Demon Valley. When he arrived, everyone in the Five Immortals Palace stopped, Tong Joaquin's group also stopped, and Feng Xiaodie also stopped.

All the people in the Fire Demon Valley stopped to listen to the roar of the monster.

Everyone knew that this roar resounded throughout the Fire Demon Valley, and the strength of that monster must be unimaginable. At this moment, many people had the idea of quitting.

At this moment, the mutation was born again. Everyone only felt that the soles of their feet suddenly shook violently, but in fact, not only the ground shook, but also the trees, the stones, and even the mountain peaks and the things in the Fire Demon Valley were shaking. It was as if the Fire Demon Valley had suddenly become furious, venting his anger.

In the face of this power of heaven and earth, only a few people in the Fire Demon Valley did not change their faces, and the rest of the people all changed their faces drastically.

Fortunately, this huge earthquake only lasted for a moment, and within a few breaths, the Fire Demon Valley returned to calm.