This practice lasted for several hours. During the reversal of heaven and earth, Lu Chen kept using his spiritual power and carefully perceived the operation of the spiritual power in his body at this time.

However, due to the reversal of heaven and earth, the attack will directly attack the spirit core. Even if the low-level Tu Xing sweeps, Lu Chen can't practice like this all the time.

"Ye Fan, they should have had enough rest. It's time to start." after saying that, Lu Chen returned to the camp.

Ye Fan and they were still resting, but Lu Chen found two dark red pills and a note on the lawn where he rested.

[brother unknown, this is the spirit blood tonifying pill, which can help you repair the spirit core.]

Only jiu'er still calls Lu Chen "nameless brother". It seems that jiu'er left him the pill.

Lu Chen looked at nine children sleeping. The girl

After taking the pill, Lu Chen relived the feeling of training before, and more than an hour passed unconsciously.

Linglong, they also woke up, and the four went back on the road and went deep along the human network.

Not far away, the former convenience was blocked by a mountain.

The mountain is huge, completely blocking the road ahead. You can't see the edge at a glance, up to hundreds of meters. Even on the surface, it is a towering mountain.

"Is this going to cross this mountain?" Ye Fan asked.

Linglong thought for a moment and said, "what the surface corresponds to here should be" a line of sky ". If I guess well, it should correspond to the surface and is also a place for breeding treasures. We'd better find the entrance first."

"What is a gleam of sky?" nine sons asked curiously.

"The Xianzu site on the earth's surface is also blocked by mountains, but there is a very hidden path. The path passes through the mountain and has numerous branches, but it can lead to the opposite side. Only the channel can accommodate only one person, and there is a sky overhead when passing through, so it is named." Linglong said.

"Although the former medicine garden is somewhat different from the surface, it is still a medicine garden in essence, so I think there may be other roads to pass through here."

Lu Chen frowned and said, "what's the treasure in the first line of sky?"

"Treasure chest!" said Linglong.

"Treasure chest?" asked Lu Chen puzzled. "Can a treasure chest be bred here? It's seven days."

Linglong explained, "the treasure chest is not bred. It should be left by the immortal ancestors as bait. There are many element elves in the immortal ancestor site. The most in the first line of heaven is the earth essence. They will collect the spirit of heaven and earth and seal it. They can make spirit tablets and collect the spirit tablets of fallen immortals."

"The spirit piece is also a thing with spiritual power. After the immortal falls, his spirit piece will escape by using the transmission symbol and fall everywhere in the seven heavy heaven. However, the earth essence can block the transmission symbol for the first time, then collect the spirit pieces, prevent them from escaping, and then put these relics into the treasure box."

"I don't know how many people have opened the surface treasure chest, but there are still spirit tablets in the treasure chest. The earth essence doesn't attack the treasure seeker, but keeps filling the spirit tablets. This seems to be their mission."

"Of course, it depends on luck how many spirit tablets are in the treasure box you open. It's normal for some people to encounter empty boxes."

Nine children frowned and said, "sister Linglong, you say the treasure chest is bait, and the earth essence doesn't attack people, that is to say, there are many mechanisms in the first line of days?"

"Yes, there won't be too many lingpians. Since everyone comes to Xianzu site for treasure hunting, they naturally won't skip a line of heaven and earth. The line of heaven and earth is narrow and there is little room to dodge. It is undoubtedly the best choice for arranging organs."

Linglong said, "there is an unwritten rule in the first day on the surface. To enter the first day, each team must be more than 100 meters apart, just to prevent others from touching the mechanism and causing their own bad luck."

Lu Chen is very glad that Mu Sheng brought Linglong down. Her knowledge reserve can make the team get twice the result with half the effort!

Spirit tablet is a resource that everyone urgently needs. Then this line of day must break through.

Several people hurried apart to look for the entrance.

Not long ago, Ye Fan shouted in the distance, "the entrance is here!"

The entrance is only about three meters wide. If you consider avoiding the mechanism, it's really too crowded to walk alone.

"Be careful, everyone, especially pay attention to the operation of heaven and earth! You follow me." after saying that, Lu Chen took the team into the first line of heaven.

Walking in the path, I looked up. Sure enough, there was only a narrow gap on my head. I felt a little depressed.

Just a few steps away, Ye Fan at the back of the hall exclaimed, "master, how is the road behind blocked!"

The crowd hurried to look behind them.

Sure enough, they walked for more than 20 meters, but at about 20 meters behind them, the rock walls on both sides merged and completely sealed the retreat!

"What's going on?" Lu Chen frowned.

"I don't know. This has never happened on the surface." Linglong was also surprised.

Jiuer said, "there is still a difference between the underground and the surface. Maybe this is a unique phenomenon here. You can only move forward, not backward!"

Fortunately, now they didn't encounter any mechanism. Lu Chen stopped first while it was temporarily safe.

Ye Fan said, "if we can't go back, I think it's better for us to go separately. There must be a lot of treasure boxes here. It's too bad for us to pass at one time."

Lu Chen looked at several people and said, "what do you think?"

Linglong nodded and said, "I agree."

Nine children also nodded, "the surface treasure hunt is not also a real fairy. We should also have the ability to protect ourselves."

Linglong said, "if you really can't pass, remember to run up!"

Lu Chen was a little worried, but considering that everyone needs the spirit piece very much, and the strength of the other three people is not weak, he can't always take care of them, so he nodded and said, "well, let's go together first. When we get to the fork in the road, we will separate the treasure hunt, and everyone will leave notes. In case of danger, we can look for it in time."

About 50 meters in front of them are safe. There are no mechanisms or treasure boxes, but the rocks will merge automatically 20 meters behind them.

Not long ago, Lu Chen appeared in front of a fork in the road, a total of seven.

"Let's choose one for ourselves."

Linglong directly entered the nearest fork on the right. Jiu'er chose the one on the left. Ye Fan looked left and right, and then looked at Lu Chen. "Master, please help me choose one. I'm not very lucky."

Lu Chen couldn't help laughing, "which one is not the same. No one has come anyway. As long as you can avoid the mechanism and earn spirit tablets, don't you have hands?"

Ye Fan thought about it and was right. He took the rightmost road.

"Master, I'm leaving." after saying that, Ye Fan rushed into the entrance.

After waiting for a while, Lu Chen found that the rock walls behind the three channels had begun to merge, and the three people had begun to explore separately.

After looking at the remaining four branches, Lu Chen chose one at random and drilled in.

Twenty meters ahead, there was a rumble behind him. The entrance had been closed. Now Lu Chen had no way back.

After a few more steps, Lu Chen suddenly found a stone tablet with four words written on it.

[Ultimate difficulty]

Lu Chen's fighting spirit just ignited suddenly froze.