Invincible Immortal Emperor Reborn In City

The growing Adventurers' Union was not only responsible for registering, recording, issuing missions, and other trivial tasks.    

    

This was a large organization that served adventurers and employers. Its purpose was to make adventurers safer and easier to explore.    

    

Therefore, every adventurer could receive an exploration manual when registering for various ruins. It recorded the information of the ruins that other adventurers had learned.    

    

The more complete the map, where there might be treasure, where it would be dangerous, which monsters, where their weaknesses were, how to deal with them, and so on would all be clearly written.    

    

Of course, it was impossible to be completely clear, and unlucky adventurers could still step into the gates of hell.    

    

These monsters in the ruins seemed to be restricted by some kind of restriction and would not walk out of the ruins.    

    

Later on, the results of the research showed that these monsters could grow faster in the ruins.    

    

Once the ruins were opened, they would be connected to the outside world, constantly absorbing spiritual energy from the outside world to replenish themselves, and the coverage would become bigger and bigger.    

    

So, if these ruins were allowed to exist for a long time, they could finally spread to the entire Earth.    

    

Moreover, most of the monsters inside could be revived once in a while after death, just like the instance dungeons in the game, which could be endlessly farmed.    

    

These ruins were mostly ancient battlefields, and the monsters inside were basically dead spirits. The special characteristic of the Undead Monster was that as long as the remnant soul did not die, they could find a skeleton and revive under the guidance of the death aura.    

    

And underneath the ancient battlefield, countless bones were buried, so it could be said that there was almost no end to killing.    

    

As for the living monsters, there were very few that could be resurrected, and killing one would mean killing one less.    

    

Chen Feng, through information integration and analysis, deduced that a plane war had occurred on Earth a long time ago, and only then could he explain why ancient battlefield ruins appeared all over the world.    

    

Plane wars were two worlds that were connected under certain conditions, resulting in many passageways appearing. Thus, plane wars would erupt in order to obtain the resources of the other world.    

    

After the war started, the landing point of each passageway would become a battlefield. The ruins that were found now were the passageways that had been formed by the overlapping of the two planes.    

    

As for the other relics that had living creatures, they were mostly ancient civilizations that had once existed on Earth.    

    

When they encountered a major catastrophe, the remaining ancient civilizations would enter a self-sealing state and take this opportunity to rest and recover.    

    

Unfortunately, this method often did not work.    

    

As the number of races decreased, their memories and history would be lost. These civilizations would gradually degenerate into the Wilderness, and they would even lose their own words and language.    

    

Or, in order to continue the civilization, they would use some extreme methods to allow the tribes to adapt to the new environment.    

    

The Naga on Naga Island in the Atlantic Ocean was most likely a descendant of the Atlantis civilization.    

    

In order to adapt to the ocean environment formed from large amounts of land being swallowed by the flood, they might use some sort of method to modify their bodies and sink into the ocean with the continent they were on.    

    

Then, because their memories and civilization were constantly lost, and even their language and intelligence had deteriorated, they finally became them, turning into monsters from inside out.    

    

This was a civilization that had once been powerful, but now it had become the sad song of the apocalyptic civilization.    

    

Now, the Naga on the island were just prey in the eyes of the adventurers, monsters used to test their strength.    

    

Even after being killed, they would be skinned and bones extracted, turning into various souvenirs or used for research.    

    

It was also the research of biologists that discovered that they had many similarities with humans. Combined with historical inference, they were able to deduce that they were transformed Atlantis people.