The Flying Villa was successfully tested, and the next step was to build the Sky City.

It's just that Sky City requires a lot of materials, and even if a lot of resources have been collected so far, it is difficult to build Sky City, but Sky City is a must, even if it is slow, you have to find a way to build it.

Although there is no clear enemy at present, Xilingchen always feels that the crisis may come suddenly, and he must prepare in advance.

A few days later, the major forces that came to the Black Dragon Plain moved.

These forces began to advance towards the Dark Mountains, and it looked as if they were really cleaning up the undead creatures of the Dark Mountains.

Jing'er's blood clan subordinates passed the news as soon as possible, and Xilingchen got the news here, although he felt that there was a problem, he didn't know what these forces were going to do, so he could only wait and see.

Not only the Purple Moon Guild was watching, but other forces in the Black Dragon Plains were also watching.

In this way, the ranks of the Dwarven Empire, the two major human empires, and some top forces such as the Two-Faced Monarch entered the Dark Mountain Range and were advancing towards the depths of the Dark Mountain Range.

That is, there must be something in the depths of the Dark Mountains.

But what exactly?

Jing'er immediately found Xiling Chen to discuss, after all, the Dark Mountain Range is also within the scope of the Black Dragon Plain, since it is the range of the Black Dragon Plain, then it is necessary to speak according to the strength, although it is not clear what these top strengths are going to do, but they may be able to find something by following the follow.

"I have an idea." Xilingchen said after hearing this.

Jing'er is very interested in the Dark Mountain Range, after all, she has been stuck at the peak of the legend for a long time, maybe the Dark Mountain Range will have a chance for her to improve, hearing that Xiling Chen has a plan, she immediately looked at the young leader curiously.

Xilingchen smiled and said, "Send my villa over to observe in the sky." ”

"Is that okay?"

Jing'er was a little surprised after hearing this, she knew the situation of Xilingchen's villa, although it was already able to fly, but there were still many problems, would it be too risky to send the villa directly? It's not good to be attacked in case it's discovered.

"We're here to scout, not to fight, and flying so high, only legendary-level powerhouses can come up, and I don't think legendary-level powerhouses can find out."

"You're the president, you say." Jing'er said after hearing this.

In this way, the plan of the Dark Mountain Range was thus determined, and Xiling Chen's side let the villa land from the sky, and it took two days to improve some problems, and then it took off to advance towards the area where the Dark Mountain Range was located.

The Flying Villa and the guild base are connected by a teleportation array, and the teleportation array designed by Xilingchen is quite stable, and this distance is teleported to each other, which is just to consume some energy.

Jing'er is teaching some gifted blood clans, and Xilingchen is also training the maids.

In this way, while monitoring the dark mountain range, while testing various devices in the air, time passed day by day, about four days later, a good news appeared, one of Xilingchen's maids, Shadow Meow, broke through to level ninety!

Another legendary powerhouse of the guild was born.

Shadow Meow was level eighty-nine when she came over, Xilingchen had taught her for so many days, and her talent was good, and because of the Spirit Gathering Formation, it was reasonable to break through.

In order to celebrate Shadow Meow's entry into the legend, Xiling Chen personally helped her create a level 90 Silver Martial Shadow Cat's Claw.

However, before the good news brought by Shadowmeow's breakthrough was over, the Black Dragon Plain was earthquaked again.

This time, Xiling Chen knew it for the first time, because he was at the center of the earthquake, and the Flying Villa saw the cause of the earthquake, at the end of the dark mountain range, two mountains suddenly collapsed, and a very huge underground ruins appeared in place.

A large number of undead creatures appeared from the ruins, and after getting the news, Jing'er and other legendary powerhouses who were more familiar with history came to the Flying City.

Seeing the picture displayed on the magic screen, Jing'er said with some doubts: "This style, how can it look like the architectural style of the Undead Emperor's era?" ”

"It's not like, it's from the era of the Undead Empire." Hayley Delwi said.

Xilingchen didn't understand very well after hearing this.

So soon the two of them gave him a science popularization, the undead emperor, this was an era before the five magic emperors, and there were several undead empires that controlled the entire continent at that time, don't think that the undead are the kind of undead natural disasters that have no wisdom and win according to numbers, it's not like this.

At that time, the technology of the Undead Empire was very advanced.

Many of the technologies created in the era of the Five Great Magic Emperors were discovered from the ruins of the Undead Empire at that time and were made by reverse research.

In the biological field, magic technology, and gene technology, the Undead Empire is very advanced.

After such an explanation by the two of them, Xilingchen understood.

"Then call someone, let's get ready to go down."

Unexpectedly by all the forces, the Purple Moon Guild had seen everything that happened here in the air, and before several big forces acted, they had already gathered the legendary powerhouses of the guild to explore.

There's no way, who let the Purple Moon Guild fly.

Xilingchen landed at the back of the ruins with a group of people, there are not many undead here, and there are no good things, mainly Xilingchen sensed spatial fluctuations here, there should be a portal.

The people involved in this operation are all legendary powerhouses, so there is no need to worry about anything going wrong.

"The portal should be underground, everyone look around and see if there is an entrance." Xilingchen said.

After looking around, Jing'er finally found an entrance a kilometer away, but there was a legendary undead guard at the entrance, she didn't rush to the guild, but came back and called everyone in the guild.

It's not that I'm afraid of anything, but I'm worried that the fluctuation of the battle will make those top forces perceive.

Undead Creature, an undead warrior wearing armor and wielding a giant axe, Legendary, level ninety-five.

It's not a monster, and it won't explode any equipment when killed, but the undead warrior doesn't have any intelligence either, and it looks like he's guarding the entrance.

"I'll lock off the space, and you guys will deal with him." Xilingchen said.

"No problem."

Because they were all legendary powerhouses, when Xilingchen blocked the surrounding space, Jing'er, Su Miao'er and others rushed up and launched an attack.

The ninety-fifth-level undead warrior was beaten to death by the group like this, and there was no chance to fight back at all.

After dealing with the guards and making sure that there was no danger, they went underground.

It seems to be a palace underground, or a tomb, according to Hayley Delway's judgment, this should be the territory of an important person in the Empire of the Dead at that time, or this is a cemetery, but because it has been too long, many things have weathered over time, and it is impossible to tell who it is from the architectural style on the ground.

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