The underworld was a place of eternal darkness. The sky was dark and dense, the land was gloomy and lifeless, and there was even a disturbing fog that was spreading in the air. No need to speak of the living, even the departed souls of the dead would have felt restless and panicky if they had to be here all day long.
Fortunately, such a situation would not last for long. The underworld would periodically get windy, and every time, a vast, mighty wind would sweep through the entire place, and those departed souls would be blown away. Like paper confetti and fallen leaves, they would flutter with the wind and eventually fall into the underworld river. Then they would drift along the river and head towards a place that was the ending and beginning point for all souls. That place was called the Sea of Souls, a sacred land that all gods yearned for but were forbidden from approaching.