A cappella, no instruments at all: no drums, no synthesizers, no piano, no guitars, no acoustic guitars, no electric guitars, no bass guitars, female lead vocal with emotional intensity, female multi-voice backing harmonies, dramatic ballad, dynamic build-up from quiet to powerful, crescendo in each verse, intense climax, cinematic emotional tension, goosebumps effect, intimate delivery, wide vocal range, occasional layered choir-like backing, heavy reverb for emotional depth, heartfelt and sorrowful mood, high emotional stakes.