Chapter 80: Massacre of the Undead
The cold night wind swept in from afar, mixed with the sickening smell of rotten earth, permeating the entire city wall.

The guards on the city wall had long been accustomed to the disgusting smell, and they stood firm at their posts without changing their expressions.

Rumble!
Not long after climbing up the city wall, the ground began to shake violently, but this vibration did not come from the ground itself, but was transmitted from outside the city wall.

Xu Mu looked into the distance and saw at the end of the horizon, the undead were surging in like a tide, continuously emerging from the underground. Their dark figures intertwined with the night, forming a hazy and huge shadow.

Their black bodies looked like a group of refugees from the city wall, but when they gathered together and turned into a rotten torrent that hit the city wall, their hideous faces and hungry eyes made countless mages feel creepy, as if doomsday had come.

"Ouch~~!"

"Uh-ming~~!"

The shrill wails and beast-like roars intertwined together, one wave higher than the other. Even residents in the city center could clearly hear the heart-piercing cries of death.

"It feels like a zombie crisis." Xu Mu muttered, and casually released three level five lightning seals.

The purple-red lightning seal flashed brightly in his palm, but it did not immediately fly out to attack the undead.

Xu Mu pressed the three lightning seals into the palm of his hand and began to weave them skillfully, fusing them into a purple-red lightning whip.

Under his control, this thunder whip seemed to be filled with a terrifying aura and flashed with terrifying light.

"I hope you have a higher chance of shipping."

Xu Mu's sharp eyes were fixed on the key area where the undead were densely packed and had built human ladders, trying to climb the city wall with the help of their companions' bodies.

He swung the thunder whip violently, and streaks of lightning poured towards the group of undead like a violent storm.

The effect of the fifth-level thunder seal is to submerge the enemy like an ocean, and the thunder whip condensed by the fifth-level thunder seal also has this effect.

Once the Thunder Whip is swung, it can release a thunder and lightning attack as surging as a small ocean, drowning a large number of undead.

Even those slightly stronger small warriors and demons could hardly withstand the destructive power contained in the fifth-level thunder seal.

Not to mention those slave-level undead who were used as human ladders and had no resistance. Even a slight scratch was enough to take the lives of these undead in an instant.

Under the powerful range attack of thunder and lightning, a large number of undead fell down instantly, like harvested wheat, unable to resist.

"So many residual souls!" Looking at the densely packed undead souls under the city wall, a hint of heat flashed in Xu Mu's eyes.

Although he could not see the spirits and residual souls, he could sense the existence of the residual souls through the undead vessels. When a large number of undead fell, countless residual souls were collected by the undead vessels on his body.

Although the undead are dead creatures, they still belong to the category of demons, so when the undead are destroyed, they will drop essence or residual soul like other demons.

Facing the undead army as dense as the ocean, the outer wall under the feet is the magician's natural defense bunker.

The magician only needs to hide on the city wall and release magic to easily destroy the undead, without having to worry about the undead's attacks.

If reality is regarded as a game, this place is undoubtedly a perfect copy for Xu Mu to obtain essence and residual soul.

In addition to him, nearby mages were also casting magic to kill the undead, but most of them did not have undead vessels, so the dropped soul remnants had to be given to him.

Several lightning whips fell one after another, and between the flashes of thunder and lightning, wave after wave of undead were knocked down, but their fallen positions were quickly filled by new undead coming from behind.

Soon after, Xu Mu noticed a ray of green spirit being swallowed by the Undead Vessel, and he couldn't help but shout out in excitement. This explosion rate is really high!
In less than half an hour, a spirit essence exploded.

"Everyone, leave the city wall immediately!"

A solemn and powerful voice rang out on the city wall, echoing in every corner.

Xu Mu turned a deaf ear to the voice, or to be more precise, he didn't hear it at all. All his attention was focused on the undead vessels and the group of undead under the city wall.

As one spirit after another merged, appeared and was collected by the undead vessels, Xu Mu used them to upgrade the level of lightning stars, striving to learn the fourth level thunderbolt as soon as possible!
"...Um...Hunter Mage, please leave the city wall area."

A military magician in charge of guarding walked towards Xu Mu. When he saw the lightning whip in his hand, he was stunned for a moment, and then spoke with a very respectful attitude.

He was so excited that he actually saw a high-level mage slaughtering slave-level undead! He must have not slept well this morning, so he will go back to catch up on his sleep later!

"Ah? Leave the city wall? Why?" Xu Mu was also stunned. This is a great copy for farming spirits. How could he leave easily?

But the other party was a military magician who was conveying the army's orders, and he could not disobey.

"I have already shown my identity card. Is there a problem with the card, or is there any other problem?" Xu Mu still asked with a glimmer of hope.

"This is a special regulation of the outer city wall!" the guard explained to Xu Mu.

Normally, the outer city wall is open to the public, and anyone can come up and observe it as long as they show their identification.

However, once an undead attack occurs, in order to ensure the safety of the guards on the city wall and the effective implementation of defense measures, all non-official personnel will be forced to leave the city wall.

The city walls can provide protection for the guards, so that they don't have to fear the direct threat of the undead. Compared to the danger of the undead, they are more afraid of someone stabbing them in the back, making trouble, and preventing them from casting magic.

If anyone disobeys and refuses to leave the city walls, they will be regarded as followers of the Black Church!

"Is there such a rule in the ancient capital?" Xu Mu was speechless. He didn't expect that there was such a rule for the city wall. Helplessly, he could only swing the lightning whip in his hand faster to earn as much spirit as possible before leaving.

"What are you doing..." The guard was stunned as he watched Xu Mu continue to kill the undead unmoved.

Should he leave or not? He was a high-level mage, but he was only a mid-level mage and he didn't dare to act casually.

Xu Mu didn't even think about it and said directly: "Please be flexible and give me another minute to kill the undead."

The residual soul in the undead vessel is almost able to condense into a spirit essence. He will leave once the spirit essence is condensed.

Since it is a rule, he will just abide by it.

The guard was speechless and asked for a minute to kill the undead. What a strange request.

"Attention all guards, attention all guards! Two commander-level corpse ministers were found on the south wall. The high-level magician team quickly assembled and went to the south wall for support!"

The voice from before echoed again, spreading to every corner of the city wall.

After condensing the last spirit essence, Xu Mu was about to leave, but was attracted by the voice and stopped. He turned to look at the guard, only to see a solemn expression on the guard's face.

(End of this chapter)