Fantasy novels were usually inspired by magic, myths, legends, and other elements. The characters, scenes, and plots involved were very rich. Here are some suggestions for writing a fantasy novel: Magic System: Magic is one of the most common elements in fantasy novels. You can set up a magic system to let the readers understand the source, development, and usage of magic. This main storyline could cover a lot of content, such as the basic knowledge of magic, detailed introductions of various spells, the growth of mages, and so on. 2. Mythology: Mythology is also a common source of inspiration for fantasy novels. You can set up a main storyline related to mythology, such as telling the origin, growth, and adventure of a mythical character. 3. Treasure of the Divine Beast: The Divine Beast is a type of character that often appears in fantasy novels. You can set up a story about the treasure of the Divine Beast to tell the story of how the protagonist finds the treasure of the Divine Beast, and how he fights fiercely with the Divine Beast, etc. 4. Journey through time: The elements of time travel often appear in fantasy novels. You can set up a protagonist to travel to another world or an ancient story to start an adventure and adventure in this world. 5. Family inheritance: Family inheritance is a common plot in fantasy novels. It can set up a family to inherit family skills, family history and cultural inheritance. The story tells the importance of the family and how the protagonist inherits the family tradition. The above are some of the main storyline of fantasy novels. I suggest that you can create them according to your own preferences and storyline.