Twilight City.
Originally, this city was used by the Half-Elves to guard the Mud Marsh, but now it hosted over 300,000 members of the underground races.
After Lide conquered the underworld, he had gathered the various races, originally scattered in different places, within the city.
This made it easier to spread the teachings, manage the races, and utilize their special characteristics.
Thus, the gathering of underground races in the city had become the mainstream, with those living outside turning into the minority.
In Earth's terms, this was a significant acceleration in the urbanization process.
When Lide flew into Twilight City, he could clearly sense the tense atmosphere below, with fully drawn crossbows and vigilant soldiers, while Magic Language Bats had already taken flight to scout the surroundings.
They were obviously guarding against something.