Note: In mythology, creatures like the three-headed dog, nine-headed hydra, and chimera can all be called demons. So, just like "Sword of Punishment" and "Immortal Flame" mentioned earlier, this is actually a commonly used vocabulary in Western fantasy novels.
The following is the main text:
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In the ever-dark Underworld dominated by murky colors, the sound of the river of fire rolled incessantly. Waves of molten lava would occasionally sweep up white bones on the shore, emitting a sizzling noise.
Amidst the ever-expanding Underworld, the pale purple glow of the Moon remained unchanged. Under its illumination, a dim yellow brilliance streaked across the gray plain.
Along the way, the dull light flickered erratically; although it moved swiftly, it gave off a sense of teetering on the brink of collapse. However, no matter how much it wobbled, it ultimately continued to fly in the sky, heading straight for a destination.
