The things in the stone room have traces of being used, not to mention these night pearls, there are still some stone tables and stone benches in this stone room, which are obviously carved out by someone, and even there are some rotten wood in the corners of the stone room, which used to be some bookshelves and the like, because they are too old, they have long been decayed.

The three of them also looked at this stone room, there was actually nothing else in it, except for these stone tables and stone benches, there was nothing else that felt precious. Of course, the night pearl on this wall is also rare in the world, and it is a treasure. But they're not here for these night pearls.

"Probably not here. Duan Siping said after looking at it for a while.

Huang Xiao frowned and thought for a while before finally nodding and saying, "It seems that this is not the case, let's take a look from the side door, right?"

Huang Xiao pointed to a small passage in the corner of the stone room and said.

This passage is relatively inconspicuous, but since they are all here, they must search this place, and they can't let go of any place.

There is no stone room in this room, and we can only hope for other places.

Sun Lao also sighed slightly, in fact, in their opinion, if this 'secret' was in this cave, it would basically be in this stone room, but unfortunately, there was nothing found in this stone room.

"And the steps?" After Huang Xiao walked into the passage, he hadn't taken a few steps when he saw a staircase spiraling down.

"It looks pretty deep. Tong Jiuyang glanced at it and said.

A master like them can also see things in the dark, but it is also within a certain range, and the steps seem to be very deep, and he can't see what is at the bottom.

"I'm going to get a night pearl. Duan Siping didn't think much about it, then turned around and returned to the stone chamber, and then took the two night pearls from the rock wall.

"Go down, if this 'secret' is really here, I'm afraid it's down there. Sun Lao said.

So the four of them took advantage of the light emitted by the night pearl. Go down the steps.

"It's deep enough. Huang Xiao said.

Originally, this cave was only a few dozen zhang higher than the bottom of the valley, but now they walked down the steps, at least a hundred zhang deep, but they had not yet reached the bottom.

Because it is in a cave, it is a little damp and cold, and the steps are even very slippery because of their age.

"It's here!" the four of them were a little surprised as they walked down the last step.

Because the space below is much larger than the stone chamber above, and it is here that they find a somewhat special rock wall.

"Here. It must be here!" Tong Jiuyang said with some excitement.

Huang Xiao's body was also faintly trembling, because just like Tong Jiuyang said, this must be the secret of the 'Seven Spirit Knife'.

Sun Lao and Duan Siping didn't show anything on their faces, but judging from their footsteps towards the stone wall, they could also see that their hearts were not at peace.

Huang Xiao and Tong Jiuyang also followed closely and walked to the cliff wall, only to see that there was a circular gap in the rock wall seven feet above the ground, and there was a key-shaped groove one foot below the circular gap, but. The size of this groove is more than ten times larger than that of an ordinary key, and the key-shaped groove is connected to the circular notch on it only by a straight groove, and I don't know what the use is.

"It seems like a door. Huang Xiao said.

Sun Lao nodded, then touched the rock wall and said, "That's right." It's a stone door, but it requires a specific key to open it. ”

"Didn't you use the 'Seven Spirit Knife' to open it?" Duan Siping asked with some surprise.

I thought that if the final 'secret' was to be opened, it would probably be to use the 'Seven Spirit Knife', but now it seems that this stone wall is on. Also, there are no grooves around here that can be inlaid with the 'Seven Spirit Knife', obviously this has nothing to do with the 'Seven Spirit Knife'.

Moreover, not only does it have nothing to do with the 'Seven Spirit Blades'. There is even a need for something else.

Just looking at the grooves in the shape of the key shows that they still need a key, but they haven't heard of what it is.

"Elder Sun, what kind of key is this?" Tong Jiuyang asked with a frown.

This is troublesome, they don't have any keys at all, let alone them, even if it's Wulongfeng, they're afraid they don't have it.

Sun Lao shook his head and said, "I don't know either." ”

"That's troublesome, even if Wulongfeng and them come over and collect seven 'Seven Spirit Swords', I'm afraid they won't be able to open here. Duan Siping said.

It's just that after Duan Siping's words were finished, Sun Lao said again: "This is not necessarily. ”

Hearing this, Huang Xiao and the three of them all set their eyes on Sun Lao.

"I think this is still related to the 'Seven Spirit Knife', you see this circular groove, is it very consistent with the size of Wulong Peak's 'Seven Spirit Plate'?" Sun Lao said, pointing to the circular gap in the cliff wall.

"Huh, listening to what you said, it really fits well with the 'Seven Spirit Plate'. Tong Jiuyang's face showed a hint of excitement.

He thought that he and the others would not be able to open this place just now, but now at least he has a chance.

"It's just that if it's not, then they can only come and see it again. Sun Lao said.

After all, this is some of his speculations, and naturally it is not nine out of ten.

"I'll inform them!" Huang Xiao began.

They naturally didn't want Wulongfeng and a few people to know about it at first, but now they really can't rely on themselves and others to obtain the secret, and they have to unite the seven 'Seven Spirit Swords'.

Obviously, this monopolization of the 'secret' will not succeed, so they can only notify Wu Longfeng that they are coming.

However, when Huang Xiao's words just fell, the four of them couldn't help but look up at the steps.

"Haha~~ Good means, good means, you really know. Wan Qingteng's laughter came down from the steps.

After a while, Wu Longfeng, Murong Longcheng and others also came here.

"Old Ghost Sun, you are so calculating, does this mean that you want to enjoy the 'secret' alone?" Wu Longfeng said with a somewhat gloomy face, "However, it's a pity that you can't open it." ”

"It seems that you have never left. Sun Lao said lightly.

"Leave?" Murong Longcheng smiled slightly, "As far as you know best, you know the secret of the 'Seven Spirit Knife', if we are really stupid to go to other places to find it, wouldn't it be in vain?

Huang Xiao is also clear now, these people are obviously secretly following, they are not worried about themselves and others. It's just that they are all masters, and if they follow from afar, even if they are themselves and others, they will not be aware of it.

However, their appearance at this time also saved them the trouble of informing them. (To be continued......)