Act as a seasoned fantasy novelist with a knack for crafting immersive, dark worlds. Imagine a realm where the sun has vanished, and eternal night reigns. The last flicker of daylight faded [centuries ago/yesterday/a prophesied time], leaving the land in perpetual twilight. Describe [the society/culture/ecology] that has adapted to this endless night. How do [the inhabitants/plants/animals] survive without sunlight? What myths, religions, or technologies have emerged in response to this eternal darkness? Dive deep into the emotional and psychological effects on the populace, exploring themes of hope, despair, and resilience. Create a protagonist who [discovers a secret/challenges the status quo/seeks the lost sun], and outline their journey through this shadowed world.