In the face of everyone's doubts, Yun Mengchen did not explain too much. She just pointed to the small crack behind the Phantom Echo Wall.

"I tried it just now, and this crack is bottomless, and maybe we can avoid it for a while. If this can really lead to the bottom of the mountain, then you can not only kill a large number of demon beasts in the way of fighting, but also avoid excessive collisions of spiritual energy.

This shield doesn't need to be removed, just shrink to protect the rift. At least buy us a little time. ”

At this time, everyone followed Yun Mengchen's fingers to notice this crack that was more than one meter wide. Hessesen's cave is clinging to a wall of phantom echoes, and it is easy to ignore the past without careful observation.

I saw that there was a chill at the mouth of this bottomless cave, if it wasn't for Yun Mengchen's idea, no one would have thought of finding a way out of it.

At first, Yun Mengchen didn't notice it, but a green vine on the edge of the crack caught her attention. I don't know if it's an illusion, Yun Mengchen felt that there was a familiar aura on it from this small piece of vine.

Yang Ze is also in this chaotic world, she knows, but the people of the seven factions are all here, but he is not visible.

Yang Ze's cunning and shamelessness Yun Mengchen has a deep understanding, since there are traces of this hole left. With his timid and death-fearing character, there is a 90% chance of survival here. This is also the basis for Yun Mengchen's judgment on everyone.

"Quick! I'll set up the formation! Garo, you take the others down to explore the way first. It's almost too late!"

Qin Xiaofeng was the first to figure out the key inside, and at this time, the army of demon beasts had already reached the foot of the mountain. This is not the time to hesitate.

I saw Dugu Jialuo take out a palm-sized round ball, and as soon as the aura was slightly triggered, it immediately emitted a dazzling bright light. He threw the ball down first, and the ball floated in the hole like gravity, turning the entire wall white.

"I'll open the way first, everyone come with me!"

Dugu Jialuo drove a black snake and rushed directly into the cave, and then the other disciples of Baigonglou behind him also sacrificed magic weapons and flew towards the entrance of the cave.

"Senior brother, look! That's the little uncle's vine?"

At this time, a disciple of the Divine Medicine Pavilion finally saw the vine at the mouth of the crack. This discovery made Lu Bin, who was still hesitating, very happy, since Yang Ze's vines appeared here, it meant that it must be safe below.

"Everyone, go down, Uncle Xiao must be down there. It's okay, it's safe!"

As a result, the Divine Medicine Pavilion became the third group of people to enter the crack, and Yun Mengchen had already led his junior brothers and sisters down first when Lu Bin was still hesitating.

Qin Xiaofeng was not bad at the critical time, and only after everyone went underground did he struggle to shrink the entire defensive shield to more than a dozen squares. Not only that, but he also covered up the hole with rotten branches and leaves. At the moment when Qin Xiaofeng entered the entrance of the cave, the menacing demon beast army had already reached the halfway point of the mountain......

"Don't worry about the rest, find that group of so-called famous and decent disciples first!

Remember, just die. Don't let one go!"

As soon as he ascended the mountain, the brown giant wolf among the three third-order demon beasts opened his mouth first. I saw a huge wolf howl resounding throughout the sky. The wolf clans in the demon beast army all changed formations after hearing this howl. The strict dense formation was formed into a search formation with fifty demon wolves as a team, and they quickly ran in all directions.

More than 3,000 cold owl birds in the sky overwhelmed the entire Fault Mountain, trying to find out those humans from a bird's-eye view from the air. In less than half an hour, this army of demon beasts had already searched the entire Broken Boundary Mountain, and they were about to set fire to the mountain, but they still couldn't see half a figure.

"Old wolf, you see that the whole mountain has been searched, and there is not a single figure. Isn't your nose breathable lately, and you've got it in the wrong direction?"

A ten-meter-long black dragon opened and closed its mucus and teased the brown wolf leader. In his eyes, he was very disdainful of this relatively small brown wolf.

"Shut up! Even if the big bird flying up there is blind, my nose can't be wrong!

Find them all for me, and see if there are any underground holes in this mountain. ”

Another half an hour passed, and there was always a trace of more than half a human being in this Boundary Mountain.

"Damn! my sense of smell is infallible. There is still a trace of aura here, why can't I find a single person!"

The angry brown wolf grabbed it and slapped it towards the Phantom Echo Wall.

Boom......

I saw that the echo wall was intact, and the paw of the brown wolf just now seemed to be blocked by an invisible barrier when it approached the echo wall. This discovery made the demon beasts who searched for nothing excited, and without any orders, dozens or hundreds of attacks directly smashed the defensive shield blocking in front of the Phantom Echo Wall. As soon as the defensive shield broke, the big crack was revealed......

"Everyone, be careful, there's a big vertical hole in front of you. Hold on to the magic weapon of flying. ”

Dugu Jialuo used the glowing ball to explore the way in front, while constantly reminding the people behind.

After passing through the vertical hole, I saw that the underground space was suddenly empty I don't know how many times. At this time, the glowing ball suspended in the air can no longer meet the needs of lighting. Because this space is so big, no matter how much power the ball increases, it will always be a firefly light.

"Everyone who has a fire spirit root is coming here!"

Everyone knows what Yun Mengchen wants to do at this time, which is nothing more than using the burning fire element to play the role of lighting. But now that the war is imminent, it is a great waste of strength to use this method. To illuminate such a large space, maybe everyone would have to run out of consciousness and faint without waiting for the demon beast to attack.

At this time, in addition to the Fire Sword Alliance, there were three other people who had fire spirit roots, but they were all secondary spirit roots. If it's just used to burn the fire element, it's still fine.

"There were eight of them, and that's good! Eight people flew out in a circle, but not beyond the end of our field of vision. Let's see how big this hole really is!"

The number one beauty in the mainland is still very prestigious, especially with her cold tone, she is simply a queen who gives orders.

I saw that the eight people were in flames all over their bodies, and they flew directly to the point of hitting the cliff. The space is really large, but luckily it doesn't exceed the limits of the view. Next, under Yun Mengchen's arrangement, a group of four people took turns to rest and recover their consciousness, and the other group directly surrounded the others in the middle and quickly flew vertically to the ground.

This process lasted for more than 20 breaths, which made the group more and more uncertain. At such a depth, I am afraid that it has reached a deep below the horizon.