After walking for about half an hour, it was already completely dark in the secret passage, but fortunately, night vision was not a difficult thing for Su Youyu's pair of magic pupils. An hour later, there was no way out in front of Su Youyu, and what appeared in front of her was the invisible bottom.

Here, there are countless pillars that support the entire Hidden City, and also maintain the formation of the Hidden City to seal the fierce beasts, but there are already cracks on the bodies of these pillars, which means that the formation has been loosened. And between each pillar there is a black iron connection.

Su Youyu carefully observed the arrangement of these dark iron chains and found that these dark iron chains formed another formation.

Array-within-a-line!

This should be the place where the four fierce beasts are sealed!

It turns out that there is a formation underground, fortunately there is this formation, otherwise, Fengyun Square will be destroyed, and the formation above the hidden city will be broken, and the fierce beast will not come out immediately.

When Su Youwen carefully avoided the Xuantie chain, the closer she got to the center, the more cracks there were on the pillars, and when Su Youwen came to the center, the several pillars that were supported here had been completely broken. Here, it should be the bottom of Fengyun Square, and the broken pillar represents the destruction of Fengyun Square and the destruction of the array eye, so the pillar is centered on this and breaks outward. It seems that soon, the four fierce beasts will break the seal!

What kind of formation is this? With the pillar as the medium, the formation is set up under the formation!

Su Youwei groped her chin and thought about it for a long time, but she didn't come up with anything, and scratched her hair irritably.

Forget it, let's go back and think about it first.

Thinking about it, Su Youyu turned around and walked towards the secret passage.

At this moment, four bright lights suddenly appeared around him, a faint blue light......

Su Youyu paused, her hands were squeezed nervously, and cold sweat broke out on her back.

She wouldn't have turned her back like this and alarmed the four fierce beasts, right?

Su Youwei turned around slowly, and the corners of her mouth twitched fiercely, wow!

In the four faint blue lights, the miniature shadows of the four fierce beasts can be faintly seen, but there seems to be some restraint around them, it should be the formation, but now that the formation above the hidden city has been destroyed, they should be able to exert some strength!

While Su Youwen carefully looked at the four fierce beasts and considered how to escape, the four fierce beasts looked at Su Youyu's blue eyes in disbelief, but unfortunately Su Youyu couldn't see their expressions clearly.

"Demon Princess?"

The princess of the demon world is here, could it be that she sensed the loosening of the seal and came to strengthen the seal? That's not good, the four of them have been trapped here for a thousand years, and they are finally about to break the seal, and they must not be sealed again!

However, why is the martial aura of this demon princess so weak? Compared to a thousand years ago, it is simply a difference between heaven and earth, clouds and mud!

The four fierce beasts silently glanced at each other, since the Demon Realm Princess's strength was weak now, why didn't they take this opportunity to destroy her, not only to avenge the revenge that had been sealed at the beginning, but also to prevent her from sealing them again!

What kind of princess of the demon world? Su Youyu frowned, remembering that when she was in the Sumeru Sea, the white snake also called her Her Royal Highness the princess, and she thought that the two of them had made a mistake. But now, this fierce beast is talking about the princess of the demon world, could it be that she was a princess of the demon world in her previous life?

Just when Su Youyu was puzzled, the four fierce beasts all shot out a force, mixed together and attacked Su Youyu, Su Youyu had beautiful eyes, damn it, they were going to let her die here today!

With a twist of the palm, the ice soul sword came out!

At this time, a figure flew by, hugging Su Youyu, and at the same time, a strong force was struck, attacking the four fierce beasts, the two forces collided, and the sound of "bang" came to naught.