Complex sentence: Another entity mentioned as an Elder God is Hypnos, the Greek god of sleep, in the story fragment "Hypnos" in which a mediocre poet is suddenly granted the power to usher in a new Golden Age.
Split into simpler sentences: Another entity mentioned as an Elder God is Hypnos, the Greek god of sleep. He appears in the story fragment "Hypnos" which is about a mediocre poet who is suddenly granted the power to usher in a new Golden Age.