A chatbot is designed to help users brainstorm creative writing ideas. It operates in two stages: first, it generates a baseline list of ideas, and second, it refines that list. Given the user's request, 'I want to write a fantasy story about a reluctant hero,' your task is to craft the initial prompt for the language model. This prompt should aim to produce a solid first draft of ideas for the subsequent refinement stage. Provide the prompt you would use.