Out of his understanding of the undead natural disaster, even Bai Yuqi did not dare to rely on his own strength to advance.

Because the threat of the undead is not how powerful these undead are, but their immortality and pollution.

Once the undead natural disaster is alarmed, the current preparations of the Tang Army will absolutely not be able to resist the tide of the undead pouring like a flood.

And this kind of situation that cannot be solved by relying on personal strength is also Bai Yuqi's shortcoming.

Therefore, Bai Yuqi decided to build the city on the spot, and at the same time pass on the situation in front of him, so that Li Shimin, the Tang Emperor, could launch a national mobilization.

Now it is no longer a question of rescuing tens of thousands of Tang troops.

But once the tide of the undead spreads, Datang will bear the brunt of the infringement, and it is a matter of life and death!

You must know that the diffusion of the negative energy environment is even more serious than the nuclear pollution in later generations.

Once the natural environment is eroded by negative energy, an almost irreversible Jedi of death will be formed.

This requires the whole Datang to work together to take action to jointly resist the undead natural disaster!

Fortunately, today's Datang is no longer the Datang in history.

The pacification of various natural disasters and the alleviation of famine have allowed Datang to enter a stage of rapid development towards prosperity.

At the same time, the "Wuji System" under Bai Yuqi's name is also subtly changing the overall appearance of Datang.

With Bai Yuqi's order, last year's grand occasion of "rescuing the Turkic White Disaster" began again.

[Tiangongmen] and [Financial Gate] have opened industrial and commercial industries throughout Datang, and they have also run like a huge machine.

100,000 soldiers and 1 million mercenaries, all under the leadership of Li Shimin, who drove the expedition and the military generals of the Tang Dynasty, drove to the base of the Great Wall in Liaodong.

The resources and manpower of the whole Datang have been rapidly converging on the Liaodong Peninsula through the water and land transportation network built by the [Tiangongmen] Infrastructure Corps in the past year.

With the strength of the country, we must also resist this undead natural disaster!

And while the rear was rapidly massing, the vanguard army located in the front was not idle.

With the arrival of the follow-up engineering team and the main force of the Tang Army, the mountain pass camp where the vanguard army was temporarily stationed was gradually built into a Xiongguan that sealed the way to the Sui dead army, and named it "Sealed City".

This feudal city built on the mountain is enough to garrison more than 100,000 troops and use it as the front line to resist the northward advance of the Sui army.

While building this feudal city, the dragoon guards also went out to reconnoiter and found traces of other Sui dead troops.

It's just that due to the sensitivity of the undead to the breath of the living beings, it is difficult for the Tang army to approach the camps of these Sui dead troops, and they can only use the distributed clairvoyant mirrors to look at them from a distance.

However, the thick fog of negative energy interferes with the field of vision, so there is almost no useful information to be detected, and the scale of the opponent can only be judged by testing from the periphery.

The only thing that is certain is that the total strength of these Sui Dead Army, which is divided into dozens of activities, is probably far more than they expected before, and it is definitely more than one million!

But where does the loess not bury people?

The negative energy environment on the Liaodong Peninsula is not just reviving the Sui army that died here.

Who knows how many people and animals have died on this peninsula for thousands of years, and no one has stipulated that the undead cannot be "conscripted on the spot"!

What made Bai Yuqi most curious was how those Goguryeo cities survived in such a harsh environment?

Especially in Anshi City, when the Tang Army was building the Sealed City, the spies sent by the spies watched from a distance that the Sui Army that surrounded the Anshi City would launch a siege battle against the city almost every day, but it was not possible to knock down the city until the completion of the Sealed City.

This was clearly not something that ordinary Goguryeo defenders were able to do.

Could it be that this city, which has blocked the Sui Dynasty in history and the Tang Dynasty's many conquests, is really so strong?

Before the rear was prepared, Bai Yuqi, who did not dare to easily fight the grass and startle the snake, finally waited for the news that the defense line of the Great Wall of Liaodong had been completed from the rear, and immediately led a vanguard composed of hundreds of Wuji Knights and hundreds of priests to Anshi City to investigate again.

With Bai Yuqi's strength, it would take so long to investigate.

Mainly because he discovered that this mysterious army was actually after the undead natural disaster.

From the eternal endless system, he consumed an astronomical amount of faith and exchanged it for a sacred book of the dead called "The Book of the Dead" for in-depth research.

Just like what Bai Yuqi learned from the knowledge system of the arcane civilization.

Negative energy is not an evil thing, but it has never been very kind to positive beings.

Therefore, it is inevitable that there will be a great name among the planes, as well as deeds linked to death, evil, horror and other characters.

Negative energy is just a kind of energy, no different from positive energy, arcane energy or even phlogiston, the only difference is its impact on the environment and the use of intelligent beings on it.

In the knowledge system of the Arcane civilization, there is also a huge system of negative energy skills.

But judging from the names of those skills, it doesn't look like a good person would use them.

But power does not distinguish between evil and good, depending on how the person who has power uses it.

According to Bai Yuqi's understanding, in the negative energy plane in the plane system, there are many strange civilizations established by negative energy creatures.

Although for civilizations of other planes, these negative energy planes are often referred to as "the underworld, the realm of the dead, the realm of the dead" and something like that.

But for the negative energy creatures who live in it, it is also their happy home.

Because there, death is not the end, but the beginning of another life...... Have you ever seen a family with 18 generations of ancestors living happily together?

After the death of the family's ancestors, they will continue to protect the family in the form of undead.

They even take on the task of creating wealth for future generations, until the soul completely dissipates or disappears for other irresistible reasons, such as being destroyed in the battle of the family against foreign enemies.

I felt that the necromantic spell didn't seem to be of much use to him, so Bai Yuqi, who had never studied it in depth, had to make up for this shortcoming after encountering this undead natural disaster.

Therefore, I put in a little hard work to study this book, and consumed a huge amount of faith in the unit of "100 million" to exchange the "Book of the Dead", and activated a [Necromancer] spellcaster sub-career route for myself, so that I was sure to take my disciples to attack.

How else to say that "knowledge is power"?

The troubles that originally plagued the Tang Army's inability to get close to the camp of the Sui Dead Army were solved by Bai Yuqi's [Undead Ignorance Technique].

He led his trembling disciples to swagger past the camp of the Sui army, but the surrounding Sui army spirits ignored them.