Nuwa was invited out of the mountain, and Zhen Yuanzi and Jiang Ziya were all invited by him, and Yinglong and Su Nu (Hou Tu) also came out.

The saint's mission this time is important.

It is to open up the dragon veins and earth veins according to the arrangement of the formation, so that the destiny of the Great Xia nation can flow and grow stronger in these veins.

In addition, many quasi-saints such as Li Jing, Bai Qi, Han Xin, Zhang Liang, Jia Xu, Sun Wukong, Nüba, and Liu Shen came to help.

This is the largest formation in history. When the other saints heard Lin Han’s idea, they were shocked by Lin Han’s handwriting.

This national defense formation almost used up half of the resources of Daxia’s treasury. Lin Han had to transfer some resources from Lutai and put them back after this world war.

The eight core cities became the core of the eight regions.

Under the eight core cities, there are seventy-two cities each, distributed at key locations connecting the land veins in each region.

The capital of Daxia serves as the central core, gathering all the dragon veins and land veins connecting to the Chinese mainland. With Jiuzhou as the base of the formation, eighty-one cities are built below to form the central eye of the formation.

Many saints were used as laborers by Lin Han and obeyed the orders of the formation master.

As saints, they were also shocked by Lin Han's huge move, from being invited at the beginning to voluntarily participating later.

Such a large-scale project is unprecedented. If this formation can be successful, they may be able to comprehend some great principles from it.

While Lin Han was busy building a national defense formation, a message came to the human world from the underworld.

The Netherworld Blood Sea couldn't help but took the first step!

"The Netherworld Blood Sea marches on the Ten Hells. Duobao Buddha makes his first appearance since the battle at Lingyun Ferry. During the battle, Duobao Buddha donned a blood-stained cassock, slew the three remaining Western gods, and led his troops to rapidly advance towards the Ten Hells."

The Netherworld Blood Sea is going to conquer the Ten Hells. The news shocked the world.

The prelude to world war begins from this moment!