"Let's go down, I want to see what the mystery is down here!" Xiao Chen muttered as he stood in the crater.

Dugu Jian nodded, then protected Xiao Chen's body, and quickly landed towards the cave mouth on the inside of the crater, the temperature in this volcano is really not covered, even if it is a martial arts consummation level powerhouse like Xiao Chen, just a hundred meters down, it is a little unable to withstand the temperature below the volcano.

It was Dugu Jian who used his spiritual power to protect Xiao Chen in time, which made him feel a little better.

Looking at the magma thousands of kilometers below, Xiao Chen said with some surprise: "I didn't expect the temperature of this magma to be really terrifying, even I can't bear it." ”

With Xiao Chen's current cultivation, as long as the True Qi shield is turned on, even if it is a high temperature of 3,000 degrees, it will not hurt him in the slightest, but now that he just feels the scorching breath of the magma below, he can't stand it a little.

Dugu Jian pondered for a moment and said: "There are monsters in this magma, and it seems to contain the demonic energy of the sky, and there should be a lot of demon beasts buried in it." ”

Xiao Chen nodded, it is not strange that there are demon beasts dying in this kind of place.

A moment later, the two of them and one beast successfully landed at the entrance of the cave on the inner side of the crater, and as soon as Xiao Chen landed, he felt a bloody breath rushing towards his face, almost making him unable to help but spit it out.

"It's so rich in blood, and it's even mixed with a foul smell," Xiao Chen said with a slight frown.

As he spoke, Xiao Chen sealed his five senses with spiritual power, and then began to observe this mysterious cave, only to see that this cave emitted a crimson light, which seemed to be reflected by magma, and it seemed that somewhere in this cave, there was a flame burning.

At the same time, the heat inside this cave was almost the same as the outside, just walking inside, Xiao Chen felt deeply depressed.

"Childe, you see, there are a lot of demon beast bones in this cave, and judging from the aura emanating from the bones of these demon beasts, these demon beasts must have been very powerful existences before they were born," Dugu Jian looked at the corpses and bones all over the ground, and said solemnly.

Even he felt a strong coercion from the bones of these demon beasts, and it is likely that these demon beasts were all at the level of immortals during their lifetimes.

Could it be that the immortal-level demon beasts in this small world have all died here, but who killed them?

Immortal-level demon beasts have a long life, except for being killed, Xiao Chen can't think of any other causes of death.

However, these bones are amazing treasures, and the blades forged from these bones are generally of a very high level, like the bones of the demon beasts scattered in this cave, they should be able to easily forge heavenly soldiers, and even holy soldiers, and at the same time, the bones of some demon beasts can also be used as materials for elixir, which can be said to be extremely cherished.

Xiao Chen said to Dugu Jian: "Put these bones into the storage ring! But everything must be careful, something is very wrong here." ”

Dugu Jian nodded, and the two of them and one beast walked towards the depths of the cave while cleaning up the skeletons of the demon beasts scattered in the cave.

Xiao Chen originally thought that walking in this cave, which no one seemed to have ever entered, should encounter some unknown monsters or dangers, but to his surprise, he walked in this cave for about half an hour and still didn't encounter anything.

Half an hour later, the two and the beast finally reached the deepest part of the cave.

The deepest part of the cave, like a huge dome palace, suddenly became open, about thousands of square meters, and the roof of the cave was much higher, about 100 meters, but there were no traces of artificial carving here, it seemed to be naturally formed.

On the ground, there is also a wide pond, and the pond is actually filled with blood, and the blood is constantly boiling, and bubbles are constantly coming out, and it seems that the temperature in this blood pool is also very high.

"Woo woo woo ......"

Looking at the blood pool in front of him, Xiao Bai's eyes flickered and screamed, the blood in this blood pool is all kinds of strange monsters, which makes Xiao Bai feel a trace of sadness, and it is also a demon clan, a little sad.

Xiao Chen glanced around the blood pool, only to see that the walls around the blood pool were inlaid with many strange, palm-sized black stones, and he asked softly in his heart: "System, is this the hidden stone?"

These stones are almost exactly the same as the mysterious hidden stones that Wudao once let him see, extremely precious hidden stones, but there are as many as a hundred here.

The system responded, "Yes, these are the legendary Hidden Stones. ”

Xiao Chen was overjoyed in his heart, it was indeed a hidden stone, as long as he had these hidden stones, he could rest assured that he could summon the powerhouses of the three realms of immortals and gods, even if Qin Yijue and Nie Feng could let them break through with confidence.

Unable to suppress the strong joy in his heart, Xiao Chen hurriedly said: "Dugu Sword, hurry up and put away all the hidden stones around this blood pool!"

The surprise of encountering the hidden stone made Xiao Chen temporarily let down his vigilance against this mysterious cave.

Dugu Jian didn't think about it so much, nodded, and was about to step forward to put away these hidden stones, but at this moment, a hoarse voice suddenly sounded in the cave.

"It's been so many years, and finally someone is here!"

"It's not good! Dugu Jian will come back soon!" The abrupt voice made Xiao Chen's heart startled.

Hearing Xiao Chen's warning, Dugu Jian hurriedly retracted his body and returned to Xiao Chen's side, and then the two of them and one beast stared closely at the blood pool, where there seemed to be a figure slowly rising from the blood pool.

Xiao Chen narrowed his eyes slightly, staring at the blood pool, only to see that in the center of the blood pool, a vague figure slowly rose, and then viscous blood flowed from the figure's body, and finally the upper body of a man dressed in a black robe and covered by black clothes was exposed from the blood pool, but his lower body was still in the blood pool.

"Who are you, and why are you here?" Xiao Chen asked in a deep voice as he stared at this person.

The figure in the center of the pool of blood slowly raised his head, and his face was also covered by a black cloth, revealing only a pair of cold and cloudy eyes.

He said in an old and hoarse voice: "How many years, the old man has been waiting here for hundreds of thousands of years, and today he finally let the old man see a living person again." ”

Hearing the words of this mysterious man in black, Xiao Chen's heart was suddenly shocked, this person has been here for hundreds of thousands of years, who is he?

Xiao Chen asked again in a cold voice, "Who are you?" Judging by your appearance and the aura on your body, it shouldn't be a human race!"

For Xiao Chen's question, the old man didn't seem to be able to answer it immediately, he even pondered for a moment before saying, "What's my name?" After so many years, even I am about to forget myself, I remember that someone used to call me Blood Demon Ancestor, if you don't mind, you can call me like that." ”