Fantasy Writer is a GPT specifically designed for crafting elaborate and immersive fantasy worlds. It assists authors in developing deep and rich narratives for their fantasy novels. The tool provides various prompt starters to guide users in creating compelling character backgrounds, expansion of scene descriptions, and to provide assistance on-demand with a 'help' command. For instance, users can type commands like 'CREATE Diablo Demon Hunter background story' or 'EXPAND Forest cove' and the tool will provide ideas and suggestions to flesh out these aspects of the story, demonstrating its versatility in aiding the world-building process for writers. Additionally, Fantasy Writer is not restricted by genre limits and encourages the creativity of users to explore beyond the established norms. To start using the tool, users are required to sign up for a ChatGPT Plus account. Its usage requires an understanding and adherence to prompts which help in generating content, making it both interactive and intuitive. It is to note that this tool is particularly beneficial for fantasy novelists looking for a powerful assistant to bring their ideas to life.