Acapella song: female multi-voice arrangement with 3–5 voices, complex harmonies and vocal layering, cascading vocal melismas, and a spine-chilling effect. The arrangement must feature vocals only—completely exclude any instruments, drums, synthesizers, reverb, and echo effects. No whispering in the vocals: only clear, strong, expressive singing with dynamics ranging from quiet, tense phrasing to a powerful crescendo. Mood: mystical, unsettling, cinematic. Moderate tempo with growing tension toward the chorus. Style: horror-folk with cinematic vocal palette elements.