Green Pepper Bat Donburi

This is the tale of an earthling, who transmigrated as a dying third-rate god but somehow rose through the ranks, gaining followers and eventually causing the Fourth Great Apocalypse.
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"Have you ever heard of the God of Games?"
"The God of Games..?" Eleena shook her head in puzzlement. "I have never heard of Him…"
"What if the God of Games could give you the power to defeat your enemies?" Xi Wei coaxed patiently.
Eleena remained silent for a while, before resolutely lifting her head and fixing her gaze on Xi Wei. "Then I am willing to become a believer of the God of Games!"
"Belief isn't something to only be spoken by mouth. Close your eyes and envision His name in your mind, and feel His power with your heart," he said solemnly.
"O Master of Games, grant us new life!"

I Am the God of Games

Lancaster City was originally one of the four most well-developed cities in Tierra, and was the only city under Tierra's rule that didn't fall after Tierra did, managing to continue thriving purely on commerce and trade.

Thanks to the vast variety of trade markets and commodities, Lancaster had the most well developed and large underground sewage system in the Valla Empire.

Along with the large scale migration of merchants and citizens into the city, the lord of the city also received great profits from commercial tax, allowing five expansions to be done on the city in its 200-year history, along with its sewage system.

The earliest copies of the sewage blueprints were long gone, and along with the five expansions, the entire underground sewage system of Lancaster became a sprawling maze spanning the entire city.

And so, the underground sewers became the shelter of some creatures that couldn't see the light of day.

Underground Sewers