To increase tension, mystery, or surprise in The Crow Child's dream subplot, you could introduce a recurring dream that becomes increasingly vivid and disturbing, causing the protagonist to question their own sanity. Additionally, you could add a mysterious character in the dreamscape who appears and disappears without any clear explanation, leaving the protagonist wondering about their true identity and intentions. To further heighten suspense, the dreams could contain cryptic symbols or clues that gradually unravel a hidden truth or shocking revelation about the protagonist's past or future. Finally, introducing a sense of urgency and danger within the dream world, such as life-threatening obstacles or a countdown to a catastrophic event, would create an increased sense of tension and surprise.
