Lucifer, Seraphina, and the entire demon horde went through the door. The cavern seemed long, spreading far and wide, and grew denser as they ventured deeper, each step echoing against the stone beneath their feet. Lucifer led the way, his movements fluid, and an unsettling silence hung in the air. Seraphina followed closely, her instincts on high alert. The deeper they went, the more the oppressive atmosphere twisted around them. The dim green glow from the veins in the walls faded as they descended, and the cavern turned almost pitch-black. The strange humming sound once again filled the space, vibrating against the walls, an almost imperceptible melody that tugged at something deep within their bones.
"What is this sound? It's so irritating," Seraphina muttered, inspecting everything around them.
