On December 4, 1174, due to Yan Tielong's discovery of the corpse plague, the officials of the Zhandes Kingdom began to investigate who was infected with the corpse plague, after all, they did not want to face hundreds of thousands, or even hundreds of undead.

Due to the discovery of the corpse plague, Yan Tielong was not in the mood to watch the situation at the North City Gate, and at this time Yan Tielong was looking for the source of the corpse plague.

Of course, Yan Tielong knew the characteristics of the corpse plague, so Yan Tielong directly asked the residents infected with the corpse plague to contact the water source and the corpse, after all, the corpse is an important source of infection.

Soon, Yan Tielong checked the ten wells in the Shitu Arena, and he did not find the corpse plague virus from the water from the wells, which also means that the groundwater has not been contaminated.

There was no problem in the area of the Shitu Arena, and he directly responded that the infected person should be infected by other areas, so Yan Tielong went to the quarantine area to ask what area the infected person had been in contact with recently.

From the infected, Yan Tielong believed that the Ancient Bear Arena was the source of the corpse plague infection, and the reason was that the infected came from the Ancient Bear Arena.

Knowing the source of infection, Yan Tielong did not go to the Ancient Bear Arena as soon as possible, after all, his identity could not command the Ancient Bear Arena, and he had to obtain the authorization of the official and the master of the Ancient Bear Arena.

At the Clan Diagram Martial Arts Hall, Mrs. Ellie learned from Yan Tielong that the corpse plague was most likely spreading from the area of the Ancient Bear Arena, and she sent two gangs to obtain the official and the Ancient Bear Arena to master the authorized scroll.

Soon the official side sent the authorized scroll, but the Ancient Bear Arena Master directly refused, in his words, they had no plague there at all, and there was no need for the official to worry about it.

Since the Ancient Bear Arena had refused to authorize, Yan Tielong and the others could only continue to investigate secretly.

Through the infected's narration, Yan Tielong and Mrs. Feng Ji Ellie infiltrated the area of the Ancient Bear Arena together.

Yan Tielong observed the street referred to by the infected person, and he found that the people on the entire street had obvious necroptrinization plague disease, which made Yan Tielong judge that the residents here had been infected for at least a week.

Yan Tielong asked Mrs. Ellie Feng Zhen beside him, what kind of person is the master of the Ancient Bear Arena?

When Madame Edlie heard Yan Tielong ask, she recalled the information about the Ancient Bear Arena not long ago, and then told Yan Tielong what she knew.

The master of the Ancient Bear Arena is named Xiong Bairuos, he is a power-type great sword master, and his personality is relatively cool.

After listening to Madame Maple Ellie's introduction, Yan Tielong suspected that there was a very powerful necromancer in the Ancient Bear Arena, and he also suspected that Xiong Bairuos had died or been controlled, otherwise he would not be indifferent to the plague.

When Mrs. Feng Qi Ellie heard Yan Tielong's judgment, she thought that she would report the situation here to the official first, and then deal with the situation here.

Yan Tielong added to Mrs. Feng Ji's suggestion, he thought that the area around the Ancient Bear Arena should be inspected, and focus on the cemetery, he thought that according to the virus characteristics of the corpse plague, the cemetery should hide a lot of undead.

Then Yan Tielong began to talk about his experience of facing the undead with Tianyu Academy, and Madame Feng Qi was a little surprised.

Mrs. Feng Zhen Ellie returned to the 100-layer trial arena and led people to surround the ancient bear arena, but Yan Tielong did not leave, he directly sneaked into the arena in stealth.

In the Ancient Bear Arena, Yan Tielong felt the hidden undead elements in the arena, and in order not to be discovered by the necromancers in the arena, he changed his own breath into the undead breath.

The deeper he went into the Ancient Bear Arena, Yan Tielong found that he had completely transformed into undead ghouls, and the skin of these undead ghouls was a little darker than normal human skin, and the others were no different from ordinary people.

Soon Yan Tielong came to the door of a room, at this time Yan Tielong was hesitating to enter, after all, he felt that there were two very powerful undead elements in the door, he was worried that once he entered the room, he would be attacked by the undead creatures inside, Yan Tielong knew very well that the powerful undead could find him as a pretender at close range.

Just as Yan Tielong was hesitating to enter inside, he suddenly sensed a powerful undead element approaching the door.

Yan Tielong thought that the undead creatures inside had discovered him, so he hurriedly left and hid.

The door was opened, and out of the room walked out a person who made Yan Tielong feel a little familiar, and the reason why Yan Tielong had a sense of familiarity was because one of the opponents he encountered in the battle for the hundred-layer trial arena was very similar to the aura of the person in front of him, you must know that that person was an undead creature controlled by a necromancer.

When the necromancer went out, he looked around and scanned it with his psychic sense, but he didn't notice anything unusual around him, so he didn't feel comfortable summoning the Demon Eater Ghost.

Demon Eater: It is immune to physical attacks, has mana absorption when attacking, and it has the ability to detect invisibility, as well as all magic resistances to fire removal and light, Achilles heel light, and weak ignition.

Seeing the appearance of the Demon Devouring Ghost, Yan Tielong did not appear nervous, and harassed the Demon Devouring Ghost with the use of the undead spirit, so that its Demon Devouring Ghost could not detect him, after all, the Demon Devouring Ghost had a reconnaissance stealth effect.

The moment Yan Tielong used his spiritual power, the necromancer seemed to sense something, but because he was too quick and didn't find anything from the summoned creatures around him, he wondered if he was delusional.

Seeing the necromancer leave, Yan Tielong began to choose whether to enter the room or follow the necromancer, and soon he made the decision to follow the necromancer.

The reason is also simple, Yan Tielong thinks that there is a powerful undead element in the room, and it is likely that the necromancer made out the undead creature, once he enters the room, he is likely to fight and startle the snake so that the necromancer has more choices, so Yan Tielong thinks that if he finds out the necromancer's line, he will be able to catch the other party when the time comes, and maybe he can also find the hidden wealth of the necromancer.

However, before tracking down the necromancer, Yan Tielong used his spiritual power formation to blacken a demon-devouring ghost, making it Yan Tielong's eyes beside the necromancer.

The specific explanation is that Yan Tielong used spiritual power to invade the soul core of the Demon Devouring Ghost, he planted a spiritual power virus in the Demon Devouring Ghost Core, and Yan Tielong installed the Spiritual Power Virus Soul Devouring Ghost, and its control has fallen into Yan Tielong's hands, as long as Yan Tielong does not activate the spiritual power virus, then the necromancer will not be able to find that the Demon Devouring Ghost around him has been taken away control.

Of course, some people may ask why Yan Tielong didn't secretly control all the Demon Devouring Ghosts, in fact, the reason is very simple, that is, Yan Tielong used his spiritual power to secretly seize the control of the Demon Devouring Ghosts, and the spiritual power consumed by Yan Tielong was nearly fifty times that of the summoner, and once the summoner discovered it in advance, he was countered to take back control, and the spiritual power used was less than that of Yan Tielong.

Yan Tielong found that the necromancer had entered a dark room in the arena through the Demon Devouring Ghost, and this dark room was full of some strange materials, which were not accepted by the world, and even Yan Tielong was made to vomit by those materials.

He couldn't stand seeing things through the sight of the Demon Devouring Ghost, he directly turned off the Demon Devouring Ghost vision to restore his emotions, after all, Yan Tielong was still a relatively normal human being, and for those non-human pictures, he couldn't do it without any reaction like a sage.

However, after Yan Tielong broke off the contact with the Demon Devouring Ghost, the necromancer suddenly checked all the undead under his control, and the reason why the necromancer reacted so much was because his secret room was arranged to specially control the undead alarm to glow.

Of course, Yan Tielong had cut off contact with the Demon Devouring Ghost, which also caused the necromancer to not find any suspicious problems, which made the necromancer think that there was something wrong with his own device.

The necromancer examines all the undead creatures he controls, and when he finds nothing, he begins to check the sensors.

When the necromancer discovers that there is nothing wrong with the sensor, it makes him suspect that something must have gone wrong with the device, so he abandons returning the sensor to its original state, but instead researches it.

At the same time, Yan Tielong, who had finished vomiting, finished processing the vomit, and he began to link the Demon Devouring Ghost that had just been secretly controlled by him.

When Yan Tielong's spiritual power was linked, Yan Tielong passed the Demon Devouring Ghost Vision, and he almost vomited again.

And the reason why Yan Tielong reacted so much was because he saw that the necromancer was conducting an evil experiment.

Waiting for Yan Tielong to let the Demon Eater Ghost look at the open book on the side, he was surprised in his heart, the reason was that the necromancer was using the forbidden art to alchemy the resurrection of the undead.

The reason why alchemy undead resurrection is considered taboo is because this set of taboo techniques requires a large number of living creatures as materials, once the undead resurrection technique is successful, then the deceased will restore all the memories of life, and according to the strength of the material, the strength can be increased, or the strength can be reduced.

Moreover, the creatures resurrected by the alchemy undead resurrection technique are only 50% lower in strength when exposed to sunlight, and they have a recovery ability that is even more terrifying than that of the dragon clan, and even has an immortality effect.

At this time, Yan Tielong finally understood why he had seen so many unacceptable materials just now, it turned out that the necromancer was planning to resurrect a certain person, but it just made Yan Tielong a little puzzled, since the necromancer could control the strength of the Ancient Bear Arena, then why didn't he directly control the entire Zhandes Kingdom, after all, Yan Tielong would not suspect that the necromancer had the ability to control the entire Zhandes Kingdom.

After all, as long as the necromancer hides well and uses some plagues to slowly turn the kingdom of Zhandes into an undead city, even the Sword Saint has no choice, and in the end, the Sword Saint is forced to leave.

In fact, the necromancer does not take care of the Sword Saint, what he cares about is that once the kingdom of Zhandes becomes an undead city, then the fresh materials he wants cannot be obtained, and once it becomes an undead city, then it will inevitably attract a large number of sects to crusade, and then this base will also be destroyed by the sect, so the necromancer just controls the ancient bear arena to find materials, and does not plan to turn this place into a city of the undead.

It's just that the necromancer didn't expect that his research lab accidentally leaked the corpse plague virus because of one of his mistakes, and he himself didn't notice it.