Sensing the rich negative energy fluctuations on the bone arrow brought back by Xiao Jin, Bai Yuqi's expression suddenly changed.

With Xiao Jin's strength, it was naturally impossible to be afraid of ordinary arrows, and he couldn't even break through the energy protection layer on his body.

The arrow that can be attached to the negative energy can cancel out the energy protection layer on its body and hit it directly, although it will not be injured, it will still hurt.

And the appearance of this bone arrow also verified some of the speculations that Bai Yuqi was worried about before, that is, the possibility that negative energy will breed "fantasy creatures"!

The so-called "fantasy creatures" are actually human beings' fear of the unknown, and the ghosts and ghosts that are bred after the fusion of negative energy, the most common of which is probably the "undead".

Corpses, bones, zombies...... Human beings' fear of death, as well as their strong obsession before death, are the most likely to lead to the birth of these death-related beings.

But generally speaking, it must be in a place where the negative energy is particularly strong.

Unfortunately, the Goguryeo Peninsula today happens to be particularly rich in negative energy.

The previous "corpse demon" was actually a harbinger of the breeding of undead on the Goguryeo Peninsula.

However, the "corpse demon" is an elimination product of the erosion of living beings by negative energy and the failure to adapt to environmental changes, which is still different from the real undead.

The true undead are "immortal".

Even positive energy attacks don't have much effect on them.

Because they are an environmental product in their own right, it is useless to destroy them simply by destroying the remains.

Unless you can directly destroy the entire negative energy environment, no matter how you kill them, they will be revived by the negative energy...... It's supposed to be dead, how else can it die?

This is also the reason why Bai Yuqi has a color change.

A single or small number of undead are not scary, whether it is a positive energy canceldown, dispelling, or sealing, there is always a way to find a way to destroy them.

But once the environment is blessed, the undead have the characteristics of infinite resurrection, then it will be troublesome.

Even in the arcane civilization, the undead natural disasters formed by the gathering of large waves of undead are among the most dangerous disasters.

Because just like the positive energy biological cluster, which can resist the negative energy environment, the massive wave of the undead also has the effect of affecting the environment.

The most terrifying thing is that they will move, and wherever they migrate like a source of pollution, they will become a dead land, and thus snowball in size.

This mysterious army is obviously such a wave of undead.

And unfortunately, it's still an army of the undead who have developed a sense of clustering.

Bai Yuqi even suspected that this army of the undead might have produced high-level undead with a certain degree of self-awareness.

An undead scourge with a high-ranking undead commander is much more dangerous than a wave of undead wandering aimlessly.

Now the question is, is there such a huge wave of undead from Goguryeo?

Faced with Bai Yuqi's doubts, Li Jing hesitated for a moment and said, "Could it be the remains of soldiers left behind during the four expeditions of the previous dynasty to Goguryeo?"

was reminded by Li Jingyi, and Bai Yuqi also reacted.

The Sui Dynasty's four expeditions to Goguryeo were probably the worst foreign wars in Chinese history.

Especially the three personal expeditions of Emperor Yang of Sui.

The first conscription was 1.13 million, and counting the logistics, I am afraid that there will be no 3 to 5 million people, and in the face of Goguryeo, whose population is only about 1 million, it was defeated.

The second time, we learned the lesson of the defeat caused by the lack of logistical supply, and built the Beijing-Hangzhou Grand Canal for transporting grain and heavy loads, and millions of people were killed in the canal alone, and then the 300,000 army and 200,000 naval vanguard troops sent, plus about 600,000 follow-up troops, were all wiped out.

I won't talk about it for the third time, and before I beat Goguryeo, my family was in chaos first.

Why Emperor Yang of the Sui Dynasty had to fight to the death with Goguryeo, and why millions of troops could not defeat Goguryeo, a small country with a lot of, will not be studied in detail.

The important thing is that the bones thrown here before and after the Sui expedition to Goguryeo are conservatively estimated to be less than one million.

The corpse was also built by Goguryeo along the road into an endless Jingguan, which was proudly used to boast about his merits.

"So as soon as that Sui army found out about us, they attacked us desperately?"

Yu Chi Baolin said with a bewildered face: "Is it because our Tang Dynasty destroyed the Sui Dynasty?"

Everyone looked at each other for a while, and Li Jing and Qin Qiong both shook their heads.

Although the Tang Dynasty replaced the Sui Dynasty, there were many reasons for the fall of the Sui Dynasty, and it really can't be completely blamed on the Tang Dynasty.

And when the Tang Dynasty was founded, these Sui dead soldiers had already died in battle, so the news of the dead people was still so well-informed, right?

What's more, if you really want to be resentful, these Sui dead soldiers should also hate Emperor Yang of Sui and Goguryeo who killed them, right? What does it have to do with them, the Tang army?

Bai Yuqi also shook his head and vetoed Yu Chi Baolin's whimsical idea.

Even if this army of the undead produced high-level undead with a certain sense of self, it was impossible for them to remember the hatred of their lives.

Because theoretically speaking, they have nothing to do with the Sui army that died in Goguryeo, they just inherited the bones of the other party and revived in the fog of negative energy.

The reason why he attacked Anshi City is probably just an obsession left by the Sui army.

Bai Yuqi even suspected that they themselves didn't know why they wanted to attack Anshi City, but only had the idea of "attacking Anshi City".

What he was worried about now was that according to the number of casualties in the Sui expedition to Goguryeo, there was no reason that only some of them had been revived, and what they encountered was probably only one of the undead natural disasters!

Million-level undead natural disaster!

Even if it is placed in the plane of the arcane civilization, it is a catastrophe at the level of annihilation.

Not to mention that it has not yet fully evolved into a high-level plane, and its extraordinary combat power is only in the Tang Dynasty time and space in front of him.

If this spreads out accidentally, no one will be able to resist the invasion of an undead natural disaster of this scale, and this world will not be able to make a pill at that time!

Fortunately, this Sui army is still trapped in the obsession of attacking Goguryeo for the time being, and they will not spread outward without completely destroying Goguryeo, which gives Bai Yuqi a chance to buffer.

Moreover, before entering the fog area, Bai Yuqi had already ordered a high wall to be built outside the fog area to prevent the negative energy creatures on the peninsula from spreading.

I believe that with the efficiency and strength of the [Tiangongmen] infrastructure construction corps, there should have been certain results by now.

Historically, Goguryeo also spent 16 years building a great wall of thousands of miles to defend against the Tang Dynasty's attack.

With the current situation in Goguryeo, this Great Wall obviously cannot be repaired, but I didn't expect this project to be replaced by [Tiangongmen], and I don't know if this is considered a historical revision.

。 m.