After a while, it was almost the end, and Huang Xiao preliminarily estimated that he had gone down to a depth of more than ten zhang underground, which became very damp, and there were a lot of water traces on the passage.

At this depth, a secret chamber appeared, which was not large, with a length and width and a height of one zhang. The secret room was relatively dry, and Huang Xiao discovered the existence of the formation, which was also relatively ordinary, that is, to isolate some breath, and there was no effect on blocking outsiders from entering or confusing outsiders.

Think about it, if the people outside find the mechanism, even if there is a formation here, it will be cracked, so this formation is mostly to ensure the dryness and comfort of this place for the Hu family.

The walls of this secret room are inlaid with more than a dozen fist-sized night pearls, and the soft light emitted by these night pearls illuminates the secret room.

There is a stone platform in the center of the secret room, and there is a futon next to the stone platform, which should be the place where Hu is practicing.

The stone platform is only one foot high on the ground, and a small iron box the size of a palm is placed on the stone platform.

Other than that, nothing else has been found in the chamber for the time being, unless there is some hidden compartment here.

"Could it be a secret recipe?" Demon Phoenix asked with some excitement, he wanted to rush over, but he held back, afraid that there would be any danger here, "Huang Xiao, is there any powerful formation here?"

Although he noticed that the formation here was very ordinary just now, Huang Xiao still didn't dare to be careless, and he probed it carefully.

"It should be fine, I'll go over first, you wait here. Huang Xiao said.

Demon Phoenix originally wanted to say that he was in the past, but thinking that Huang Xiao was more proficient in the formation, he didn't say anything more.

Huang Xiao approached cautiously, and after a while, he walked safely to the stone platform.

"Come on, no problem. Huang Xiao shouted.

The demon phoenix suddenly came to Huang Xiao's side, and hurriedly shouted: "Quick, open it quickly, the thing hidden here must be the most important thing for the Hu family, and I think it is the secret of the exercises." ”

Huang Xiao shook his head slightly and said, "It's not like a secret book, this iron box seems to be too small to fit a book." ”

The demon phoenix looked at the iron box and compared it, and found that it was indeed smaller than a book.

"Maybe it's written on silk?" said the Demon Phoenix, still a little unwillingly.

"Just open it and see. Huang Xiao smiled, he squatted down and checked the situation around the stone platform, including the iron box.

This iron box is not locked or something, it should be because the Hu family often comes here.

When Huang Xiao stretched out his hand and touched the iron box and was about to open it, Huang Xiao's face changed suddenly.

"What's wrong?" Demon Phoenix noticed a change in Huang Xiao's expression and hurriedly asked.

His heart has always been hanging, for fear that something will happen.

"This is no ordinary tin box. Huang Xiao said.

"Oh?" Demon Phoenix heard Huang Xiao say this, and also stretched out his wings and touched the small iron box and said, "It looks very extraordinary, I don't know what kind of iron it is." ”

"It's probably a small iron box made of exotic ores and stones, and the boxes are so carefully crafted, I am even more curious about the things inside. Huang Xiao said, "You retreat slightly, I'm ready to open it, and I don't know if there will be any danger." ”

The Demon Phoenix nodded and stepped back three feet.

Huang Xiao took a deep breath, and then pressed his hand.

With a 'click', the iron box was easily opened by Huang Xiao.

When the iron box was opened a little crack, Huang Xiao couldn't help but scream, his hands retracted suddenly, and his body quickly retreated.

The same was true of the Demon Phoenix, and the two of them retreated to the door of the secret room at once.

"What a terrible breath!" cried out the Demon Phoenix in horror.

"It's demonic energy, the kind of aura of the demon Dao exercises, extremely demonic and powerful. Huang Xiao quickly calmed down, and he found that what was emanating from the iron box just now was a powerful demonic Dao exercise aura.

Most of the breath of those people in the demon path is like this, similar to the demon path exercises, they will have their own unique breath, demonic energy, ghost energy, evil energy, demonic energy, each with its own name.

"That's just demonic energy, it shouldn't be fatal, right?" said the Demon Phoenix.

"I was taken aback just now. Huang Xiao smiled.

So the two returned to the stone platform, and at this time, with psychological preparation, Huang Xiao finally opened the iron box.

"What kind of bead is this?" Huang Xiao and Demon Phoenix's bodies trembled uncontrollably, this demonic aura was too powerful for them to resist.

With a 'snap', Huang Xiao and the Demon Phoenix immediately closed the iron box again after just seeing the beads in the box.

This is a walnut-sized, dark green bead made of unknown material, with complex textures on the surface, which is very smooth.

The demonic aura was too strong for the two to bear.

When the iron box was closed, this demonic aura was immediately isolated.

Huang Xiao knew that there was a magical isolation aura formation inside this iron box, this was not an ordinary formation, it was not an ordinary formation, it was impossible to isolate such a powerful demonic aura with an ordinary formation.

I don't know what kind of iron box made of strange minerals and stones, unknown beads that exude an incomparably powerful demonic aura, plus the magical isolation formation arranged inside the iron box, no matter which one is extremely shocking and amazing.

Huang Xiao's face was pale, and he couldn't stop gasping for breath: "It's definitely a baby, this feeling is like the supreme demonic qi emitted by the 'Supreme Demon Wall', and the evil qi emitted by the 'Supreme Evil Pillar' under the evil waters." ”

"You mean, the aura emitted by this bead is comparable to that of the two?" the Demon Phoenix asked with some trepidation.

"That's right, such a powerful aura is simply irresistible, and you have also felt the 'Supreme Demonic Aura'. Huang Xiao said.

"Doesn't this mean that this is the supreme treasure of the Demon Spirit Sect, the supreme treasure of the Demon Dao?" the Demon Phoenix exclaimed, "How could such a thing be in the hands of the Hu family? ”

"Although you have lived for a thousand years, you may not know as much about some of the secrets in the rivers and lakes as I do. It seems that if you want to know this, you have to find an opportunity to ask from the ancestor. Huang Xiao said.

The demon phoenix was a little embarrassed, he basically didn't have contact with humans for thousands of years before, and of course he didn't know much about the rivers and lakes of humans, so it was normal that he hadn't heard of it.

And Huang Xiao has not been in the martial arts world for a long time, and it is normal that he has never heard of such a thing in the Demon Spirit Sect.

"No matter what, such a treasure is not something that Hu can have. Huang Xiao said.

"No wonder Hu Ji is strange by nature, and he always retreats from seeing people, so as not to be known that he has this magical bead?" said the Demon Phoenix.

"That's the only explanation. Huang Xiao nodded and said, "If the people of the Demon Spirit Sect know about it, such a treasure will not be his turn, so he has been hiding here, saying that it is a retreat, I am afraid that he is using this bead to improve his strength, no wonder his strength has improved so quickly." It stands to reason that he should be at the peak of the Enlightenment Realm, and when we met him, he was already at the middle grade of the Dao Realm, or even the peak of the middle grade. ”

"That should have something to do with his exercises. Demon Phoenix said.

"Yes, and his exercises. Huang Xiao nodded and said, "Now I have a guess about the exercises of the Hu system. ”

"What speculation?" asked the Demon.

"Hu's exercises, or his magical method of rebirth with a broken arm, must have something to do with this bead. Do you remember when we fought Hu at the last time, the powerful aura emanating from his body was not this aura?" Huang Xiao said.