Underworld Realm.
After a whirlwind sensation, twenty to thirty members of the Yellow Springs Sect were finally transmitted to this realm.
Before their eyes lay vast, steep gray-brown cliffs, and in the distance, they could see numerous dark caves of varying sizes, with hardly any vegetation in sight.
Above them was a dark gray sky, devoid of the sun, moon, or any stars.
Surrounding them were billows of black, gray, and white smoke, filled with the pervasive stench of sulfur.
Clearly, they were situated in an extremely vast and unknown basin or valley.
"This part of the Underworld Realm is the prison where our sect holds important figures, crafted in imitation of the Heavenly Abyss.
It is said that the Heavenly Abyss is filled with poisonous smoke, fiery mist, and demonic spirits. Even a Foundation Establishment Great Cultivator will face death at every step and find it hard to survive!"
"Aside from the common prison for ordinary prisoners,
