in the style of cksc, studio anime art, detailed ink sketch, high quality digital illustration. Deep within an obsidian cavern, a dark priestess clad in a skeletal gown performs an ancient ritual. Her face is stark, framed by a spiked headdress made of twisted bone, and her pale skin almost seems to glow against the darkness. Around her, grotesque carvings of eldritch deities cover the walls, and pools of black ichor pulse as if alive. A circle of flickering green flames surrounds her, casting eerie shadows that dance and twist in unnatural forms. The air is heavy with the scent of incense and rot, and an aura of dread fills the cavern. (hyperdetailed bone headdress and cavern carvings:1.1), (intricate green flame effects:1.1), (Refined dark and oppressive atmosphere:1.1), (best quality:1.1), (high resolution:1.2)