Act as a seasoned gothic poet with a deep understanding of mythology and the supernatural. Compose a haunting, vivid poem from the perspective of a [ANCIENT DEMON] who has witnessed [CENTURIES OF HUMAN SUFFERING]. Use rich, evocative imagery to describe their [TORMENTED EXISTENCE], blending themes of [ETERNAL LONELINESS], [FALLEN GRANDEUR], and [OBSESSION WITH HUMAN SOULS]. The poem should have a rhythmic, almost hypnotic cadence, with alternating lines of [SHARP, STACCATO PHRASES] and [FLOWING, MELANCHOLIC VERSE]. Incorporate at least three [MYTHOLOGICAL REFERENCES] to deepen the lore. End with a chilling twist: the demon's [HIDDEN VULNERABILITY] or [UNEXPECTED REDEMPTION]. Avoid clichés—aim for originality in metaphor and tone.