Neisseria Ones

Far away from Marginal Skin Plain, at another end of the world,

This place was covered in countless completely mined-out metal mines. It had once been the Old World's largest metal-mining region in its early days, and even the early Monastery of Suffering had bought large quantities from here to develop chain cultivation.

Moreover, once nourished by the Evil Sun, the metal here had possessed the ability to regenerate.

But after the war ended, the place was quickly mined dry and fell into decline. Hundreds of years ago, treasure hunters still came here in hopes of finding rare metals. Now, hardly anyone visited. Many prophets of the Old World had even predicted that it would eventually transform into a new abyss,

Yet hundreds of years passed, and the place remained unchanged.

Although it was completely shrouded in darkness, there was always a feeling that ore capable of glowing in the past still remained among the mines, leaving this place forever at the "tipping point" of transforming into the Extreme Dark Zone.

However,

Almost no one knew that,

Deep inside one of the mines, walking along a fixed tunnel route thirteen times back and forth, then moving the inconspicuous stones scattered across the ground, would open a hidden passage.

The passage radiated an intense metallic sheen. Each time it was opened, it illuminated the entire mine.

At the deepest part of the passage lay a secret region covered in brain nerves, its complexity surpassing that of the Source Plague Zone. A special race that had survived from the Ancient Times was conducting all kinds of secret experiments there.

The Neisseria Ones

They were a special race whose brains were on par with those of the Mad Ones, but unlike the Mad Ones, they were not solitary and self-willed. Instead, they possessed