Act as a seasoned comic book writer with 10+ years of experience in crafting superhero lore. Design a unique superhero whose powers manifest based on the nature of their dreams. Provide the following details: 1. [HERO_NAME]: A name that reflects their dream-based abilities (e.g., 'Morpheus', 'Oneironaut'). 2. [POWER_SOURCE]: Explain how their powers work—do they gain strength from nightmares, lucid dreams, or prophetic visions? 3. [WEAKNESS]: Describe a limitation tied to their dream state (e.g., powers fade if they don’t sleep, or they’re vulnerable when dreaming). 4. [BACKSTORY]: A brief origin—how did they discover their abilities? Was it a traumatic event, a scientific accident, or a mystical encounter? Make the hero compelling by blending psychological depth with creative superpowers. Avoid clichés and focus on originality.