As soon as the 20,000 mercenaries who had retired from the battlefields of foreign races arrived in Kuangtao City and Leiyun City, they immediately began to survey the terrain, arrange defenses, set alerts, set traps and ambushes.
Although there are no true masters among these mercenaries, the highest cultivation level is only the ninth level of Ningyuan Realm. Even several leaders, the captains of the mercenary groups, have not reached the level of Gangsha Realm.
However, their overall strength is extremely powerful, at least several times stronger than the well-trained elite troops of the Chen Mansion.
You have to know that these people were able to survive on the alien battlefield and retire safely. The battles they experienced were much more cruel and intense than people imagined. These people are the elite among the elite.
The security set up by these people makes it impossible for even a strong man in the Gangsha realm to pass through quietly.
The traps and ambushes that were set up could also pose a certain threat to the strong ones in the Gangsha realm.
As for the defenses set up, they rely on the terrain, and the two cities of Kuangtao and Leiyun are arranged like an iron barrel, forming a three-dimensional defense of land, sea and air.
Whether the enemy attacks from land, river or air, it can cause huge damage to the opponent.
At this point, the defenses of the two cities, Kuangtao and Leiyun, began to take shape.
At present, Leiyun City has not been built yet, and only the foundation has been laid. If one wants to build a magnificent city, even with the help of disciples in the Zhenqi and Ningyuan realms, no results will be seen within three or four months.
Chen Lei was not in a hurry either. He carefully surveyed the terrain between the cities of Leiyun and Kuangtao, and prepared to set up a formation based on the terrain of the two cities.
This formation is the first gateway to the territory where the Chen Mansion is located, and it is also the most vulnerable gateway, so the layout of the formation must be cautious. By now, Chen Lei has just come up with a draft in his mind.
In the area of Leiyun City, the sky is filled with thick thunderclouds all year round, and heavy rains continue. This is caused by the unique terrain conditions here.
Although the terrain here is not a natural lightning-gathering formation like Xuan Lei Peak, it already has the rudiments of a lightning-gathering formation. As long as Chen Lei makes good use of it, he can set up a heaven-and-earth-level lightning-gathering formation.
Moreover, Kuangtao City is close to the Qingyang River, and the source of the Qingyang River comes from the Duanshan Mountains. The section of the river located in Qingyang Town is called the Qingyang River.
In fact, this river is a very famous river in Xuanyuan Continent. It is one of the three major rivers in Xuanyuan Continent and is called Kuanglan River.
The Kuanglan River has abundant water resources and contains huge water system energy.
Especially in the section of the river basin near Kuangtao City, the terrain difference is extremely large, forming extremely fierce waves and steep terrain. This place is most suitable for arranging water system formations.
What Chen Lei had in mind was to combine the two major formations of water and thunder, and arrange them into a large formation of heaven and earth level to protect the entire Chen territory.
This heaven-and-earth-level formation was named the Crazy Thunder Dragon Formation by Chen Lei.
If such an array formation is truly completed, by then, even a Martial Emperor-level powerhouse would probably not be able to forcibly break through this defense.