The latter half of the night.
The other side of Black Mountain County.
This was a dark underground space. It was silent, damp, and dark, with an Underground River flowing nearby.
Suddenly.
A sinister wind stirred in the originally hollow, quiet surroundings.
"The Sacrificial Offering for today has been sent in. We can begin. I hope their lives are worth something." It was the voice of a middle-aged man.
"Going into the underworld isn't that simple. There are many unknown risks." This time, the speaker was an old man with a hoarse voice. His tone was slow and feeble, as if he were about to be buried.
In the darkness, the middle-aged man's voice drifted out. "That space is too vast. If we can't finish exploring it in a short time, we'll be in trouble once the authorities or other Awakened factions discover us."
"You all know what kind of commotion that stone coffin caused last time. If it happens a few more times, Black Mountain County will be watched sooner or later."
"It won't be that easy." This time, a woman spoke.
She let out a cold laugh and said, "There are only two ways to enter that space. The first is to force your way in. But it's a Supernatural place. If you want to invade it by force, you'll need to see whether you have the strength."
"The other is to cross over and travel through the underworld. That ability isn't common."
The woman's voice carried a hint of Evil nature and strangeness. Not only did it sound like an electronic voice, but her words also produced a powerful echo, making several people in the darkness cover their ears.
This was not a normal speaking voice.
A terrifying evil spirit was lodged in the woman's throat, and