At the beginning of the apocalypse, Huo Ye and the others were training in the wild, and there was no one around them, and they didn't even have a bunker to cover their figures, so they could only resist the attack of monsters with their flesh and blood.

Fortunately, they worked as a team, and although they were somewhat damaged, they finally withstood wave after wave of monster attacks, and the team gained a lot of high-quality exercise books, weapons and protective gear.

In the early stage of the apocalypse, there was abundant spiritual energy between heaven and earth, and Huo Ye's team, which carried it in an open-air environment, had always been a big step ahead of ordinary people in terms of cultivation level.

The four people who were sent by Huo Ye to find Ning Qingyun, Zhang Shouyi, Wang Yang, Tian Zhen, and Yang Ping were all very outstanding characters in the team, and they were all cultivators at the peak of the Chongmai Realm before entering the Cloud Mist Secret Realm.

Ning Qingyun rescued Wang Yang and the others back to the tree cave maze, except for Wang Yang, who was seriously injured by snake venom and had relatively heavy body loss, the other people's injuries were relatively slight, and it would be good to recuperate for a day or two.

When the four of them were recuperating from their injuries, Ning Qingyun went to the territory of the Hydra Monster Snake several times to investigate the situation, and the quagmire in the territory of the Hydra Monster Snake would only appear when the Monster Snake fought against the enemy, and it was used as a trap for auxiliary attacks, so that it was also convenient for the Hydra Monster Snake to lure some prey to take the bait, so as to achieve the purpose of hunting.

It's just that this time the quagmire has not disappeared, and Ning Qingyun has observed it a few times and found that the quagmire has always existed.

Does this mean that the strange snake is seriously injured and needs to use this quagmire to prevent the enemy from approaching?

He thought back to the rumbling sound that came from under the stone statues when he fled that day, when he sensed that danger was coming, and hurriedly ran away, and now he wondered if it could be the opening of the dungeon he had been looking for, and according to his previous speculation, the dungeon should be in that area.

The nine-headed monster snake should usually be hidden in the dungeon, this time, the hydra's vitality was greatly damaged, and it was probably impossible to recover in a short period of time, this is the best time to visit the dungeon.

In the dark, Ning Qingyun always felt that there was something very important to him in the underground palace, and no matter what, he had to make a trip.

As soon as Ning Qingyun said that he planned to visit the underground palace, Wang Yang took the lead in raising objections, thinking that it was not appropriate to take risks.

Ning Qingyun must go, his attitude is resolute, and he cannot refute it, but whether the four of them want to go or not, Ning Qingyun let them choose by themselves, and he does not force them.

The purpose of the four of them coming in was to protect Ning Qingyun, how could they let him go on an adventure alone?

Although the four of them all wanted to go with Ning Qingyun, Wang Yang's body had not fully recovered, so Ning Qingyun forcefully let him stay, and the other three accompanied him to visit the underground palace.

When they came to the territory of the Hydra, each of the four of them held a bamboo row in their hands. This time the quagmire has always existed, not suddenly, Ning Qingyun and they made sufficient preparations before they came, there is a kind of spotted flower bamboo growing in the secret realm, hollow and light, strong and tough, it is very suitable to be used as a bamboo row.

Ning Qingyun held a bamboo row of four people, and after a lot of hard work, he finally came to the area of the stone statue group.

The tall stone statues had all flipped upside down and sunk into the mire, revealing only stone piers one by one.

In the center of the area of the stone statues, a square hole appeared, like a deep well, which looked mysterious and dangerous.

Ning Qingyun hid the bamboo rafts under the mud, and then stepped on those stone piers and came to the cave step by step.

Ning Qingyun laid a formation around the cave, and with the cover of this formation, this hole would not be discovered lightly.

There were some narrow and steep steps under the cave that were almost perpendicular to the ground, and the four of them exchanged a glance with each other, and then they decided to slide down with the help of ropes.

The landing process went fairly smoothly and was not attacked.

The ropes were thirty meters long, and they descended two-thirds of the length to the end, and below was a hard, flat stone floor, surrounded by solid walls, forming a boxy and narrow space, with many jumble raised stones on the west wall.

"Could these rocks be some kind of mechanism?" Zhang Shouyi guessed.

"Well, this is indeed a mechanism, you all stay back." Ning Qingyun pushed the other three aside and began to study the location of these stones.

Ning Qingyun had a book in his hand, and after some deduction, he quickly opened the hidden stone door.

"If nothing else, the hydra is hiding here, after entering, everyone be careful, follow the big army, and don't get separated." Ning Qingyun admonished.

Several people nodded yes.

On the wall to the west, there was a heavy sound of stone doors moving, and a one-man high stone door opened.

The four merfolk entered, and behind the stone door were the steps that led to the underground, the steps were wide and gentle, and after walking about a hundred steps, they came to an open place.

"Wow, what is this place? This stone pillar is so tall, what kind of creature is carved on it, it looks so strange! Tian Zhen looked at the scene in front of him and said in amazement.

It looks like a school yard, with a flat and open space in the middle, surrounded by many round stone pillars, carved with some strangely shaped biological patterns, delicate and lifelike.

"Don't move." Ning Qingyun saw Tian Zhen curiously reaching out to touch the pattern carved on the stone pillar, and quickly stopped him.

"Don't touch the things here first, I'll study and study first, it's best not to ......" Ning Qingyun was talking, his feet slipped, and a stone on the ground suddenly sank, "Ah", Ning Qingyun exclaimed unconsciously, and his body fell straight down.

"Seventh Son!" "Boss!" Ning Qingyun also heard the shouts of Tian Zhen and the others in his ears, he hurriedly urged the aura in his body, used the cultivated light body exercises, adjusted the posture of descending, and when he was about to fall to the bottom, his body was clumped into a ball, and then he flipped in the air, and immediately fell to the ground with both feet steadily.

"I said hurry up and go down, you have to say wait, wait, look, there is no hole now, and you can't pry it open, what can I do?" Zhang Shouyi was so anxious that he turned around like an ant on the hot pot and complained to Yang Ping.

"I didn't expect this hole to disappear so quickly, just now if you jump down after it, the boss may not be able to stand firm, you have to smash the boss, in case the boss is crushed, will you pay for it?" Yang Ping said aggrieved and annoyed.