Sea Star Underworld.
The sky here was, as always, crimson like blood, even more like fire.
The ground was charred black like coal, while hazy purple mist drifted through the air from time to time.
At the heart of this Underworld stood a magnificent city with black walls that soared into the clouds, a river of lava flowing outside them, volcanoes rising all around, and an incredibly vast space within.
Four walls, four drawbridges, and four plaques hanging above the gate towers.
Each bore the four bold characters: "Enma Castle"!
It was majestic and imposing, filling one with a heavy sense of awe as its authority bore down on them.
Only the Shinigami, Underworld generals, and Underworld soldiers under King Enma, along with the relatives from past generations whom they wished to keep and the descendants they had bred, were qualified to live here.
Coupled with the fact that spiritual bodies generally lived for several centuries.
Even this already enormous city had become somewhat overcrowded.
However, ever since King Enma had led his forces to the Pure Land of the Shinobi World, the city's population had decreased considerably.
Yet few among them worried about it.
Because in their hearts, King Enma was invincible.
Especially after the successful conquest of the Kabane Underworld and the Demon Slayer Underworld, which had only strengthened that belief.
Until the defeated remnants who fled back brought news of King Enma's defeat.
Every scorching breath within Enma Castle began to carry the scent of panic.
This drew countless Kabane Butterflies, like swarms of fireflies, their densely packed red lights flickering as they flew through the streets and alleys, creating a breathtaking sight.
Fortunately, Sanast, King Enma's strongest Underworld general and commander of the Shinigami Army, promptly announced that as the ruler of the Underworld, King Enma