TL;DR
A fantasy novel works when the impossible parts follow rules the reader can learn, and when the story is about people before it is about the world. Decide what is different, set limits and costs, reveal the world through the protagonist's problems, and keep track of facts across a long book.
To write a fantasy novel, start with a character who wants something, then build only the amount of world that their story needs, and give anything impossible clear rules and a cost. Readers will accept dragons, floating cities and gods who walk the earth. What they will not accept is a world where the rules change when the author needs a way out. Believability in fantasy is not realism. It is consistency, and it is built before you write the first page.
The core craft is the one in how to write a novel. Fantasy adds the invented world, the magic, the length and the work of keeping it all true.
Start with the story, not the map
Many fantasy projects stall because the writer has three hundred pages of history and no protagonist. Begin with the person who will carry the book and ask what they want now. A world answers the question: what makes that want hard here?
Take an imaginary novel. Ilse is a river pilot in a delta kingdom where the tides are controlled by a guild of salt-singers. She wants her brother back; he vanished while apprenticed to the guild. That one line already implies a world: a delta, a guild, a power that is hired, and a secret. You do not need the capital's founding myth to start. Worldbuilding guide shows how to decide which layers to build and which to leave unwritten.
Decide what is different
Fantasy is not defined by one ingredient. Pick the one to three things that are different about your world and let the rest be familiar. In the example, the difference is that the tides are sung and the singers are a guild. Everything else can behave like ordinary life: people need food, rent, news and sleep.
A useful test: if you removed the fantasy element, would the story still need its world? If yes, the world is doing structural work. If not, it is decoration, and you can lighten it.
Give magic rules and a cost
Brandon Sanderson, on his own site, offers a guideline he calls his First Law: an author's ability to solve conflict with magic is directly proportional to how well the reader understands that magic. He is clear that these are guidelines that have worked for him, not rules everyone must follow, and he notes that Tolkien did not explain his magic in detail. He also reports that when he said on a Worldcon panel that magic should have rules, every other panelist disagreed, because they feared rules would remove the sense of wonder. He came to see two schools, which he calls hard and soft magic, and you can choose either. They ask for different things:
| Approach | What the reader knows | Best use | Risk |
|---|---|---|---|
| Defined magic | Limits, costs and how it works | Magic that solves or causes plot problems | It can feel mechanical if the rules are only explained, not dramatised |
| Mysterious magic | Only what it feels like | Atmosphere, awe and a world that is bigger than the hero | The author must not use it to rescue the plot |
Scroll horizontally to see all columns. Arrow keys work when the table is focused.
If magic will move the plot, write down its limits before the draft. Four questions are enough:
- What can it do, and what can it never do?
- What does it cost, and who pays?
- Who has access, and who is shut out?
- How does it fail?
Failure and cost are where stories come from. A magic with no cost cannot create a dilemma, and a dilemma is what a scene is made of.
Sanderson also quotes the editor John Campbell, who argued that science fiction develops the logical consequences of a few postulates while fantasy "makes its rules as it goes along." Sanderson disagrees with Campbell, but he treats the charge as one fantasy writers should be wary of: if the rules change whenever the characters are in danger, the fiction ends up unfulfilling. You may break your own rules for a reason, but the reader has to feel that the break is a choice and not a rescue.
Let the world arrive through problems
The classic mistake in fantasy openings is the briefing: three pages of history before anything happens. Readers learn a world the way they learn a new city, by needing something in it.
- Show the world when it gets in the way. Ilse cannot cross the estuary because the singers have raised the tide. We learn what singers are by being stopped by one.
- Give names weight by use, not by explanation. A name that appears with a want, a rule or a danger is remembered. A name that appears in a list is not.
- Trust inference. You do not have to define "salt-singer" if the way Ilse flinches around one tells the reader enough.
- Hold back what the hero would not think about. People do not narrate their own culture to themselves.
Build the layers you will use
You can decide a lot of world before you start, but it pays to build in the order the story needs it:
- Rules and limits. What is impossible, and what has a price.
- Power. Who rules, who obeys and who profits.
- Places. Where the story happens, and what each place pressures the protagonist to do.
- Daily life. Food, money, work and belief, enough to make scenes concrete.
- History. Only the parts that cause the present conflict.
A fantasy map is useful when travel affects the plot. A timeline helps when events from long ago still matter. A worldbuilding template gives a set of fields so none of it lives only in your head. Use them to answer questions that scenes raise, not to avoid writing scenes.
How long should a fantasy novel be?
Sources differ, and the range is wide. Jericho Writers says fantasy novels can run up to 180,000 words or even over 200,000, but that the book must be wonderful and must justify the length. Reedsy's editors give 100,000 to 115,000 for fantasy and science fiction, and note that some books in a fantasy series exceed 140,000. Both agree fantasy runs longer than most genres, and Jericho adds that you must be scrupulous about editing sentences for length.
A book at the long end has to earn every page. On Jane Friedman's site, Amy L. Bernstein writes that many novelists, even the most committed big-world fantasy writers, struggle to keep pacing, plotting and dialogue tight across a draft over 100,000 words. Check recent debut titles in your subgenre and aim near their length. Average book word count compares lengths by genre.
Keep a long world consistent
Fantasy books are long and full of invented facts, and the facts drift: a river changes direction, a title appears in two spellings, a character knows a secret before she learns it. Three habits prevent most of it.
- Write facts down when you invent them. A line per fact is enough.
- Keep one source of truth. If the map says three days by boat, the manuscript says three days.
- Check on a schedule. After each act, read your notes against the draft.
A story bible is the name for that source of truth. In Musael, the world and characters codex keeps characters, places, objects and events together, and names in the manuscript link back to their entry. Continuity checks compare the rules you set with the manuscript. If your world spans several books, the Ink and Press plans let a series share one world.
Common fantasy mistakes
- Starting with a prologue of history. Start with a person under pressure.
- Magic as a shortcut. If a spell solves the climax and no one has seen the limits, readers feel cheated.
- Names no one can say. A name has to be readable aloud.
- Too many viewpoints too soon. Each viewpoint needs its own want and voice.
- Worldbuilding as a hiding place. If you are polishing a map instead of drafting, set a limit and write a scene.
Frequently asked questions
How do I start writing a fantasy novel?
Start with a protagonist and what they want, and add the one or two things that make your world different. Write the first scene where that want meets an obstacle in the world. Build the rest as you need it.
Do I need a magic system?
Only if magic affects the plot. If it solves problems or creates them, define its limits and cost. If it is atmosphere, you can leave it mysterious, as long as you do not use it to rescue the ending.
How long should a fantasy novel be?
Jericho Writers says up to 180,000 or more can work if the book earns it, and Reedsy gives 100,000 to 115,000 as the usual range. Check your subgenre and aim near recent books of the same kind.
Should I draw a map first?
Draw one when the geography will affect the story. Otherwise a rough sketch is enough, and you can refine it when scenes need it.
How do I avoid info-dumping the world?
Introduce each element when the protagonist needs it, and trust the reader to infer. If a paragraph explains something nobody in the scene would think about, cut it or move it into a line of conflict.
Where Musael fits
A fantasy novel is a lot of invented facts that have to agree with each other, and the writer who finishes one is the writer who can still trust the world in the last chapter. In Musael the plan, the manuscript and the world live in one project, with a codex, a timeline and, on Ink and Press, maps with pins. On those plans the AI never writes your scenes; it reads what you wrote and flags what contradicts your world.
Sources
- Brandon Sanderson, "Sanderson's First Law": brandonsanderson.com
- Jericho Writers, "How Many Words in a Novel?": jerichowriters.com
- Reedsy, "How Many Words in a Novel?": blog.reedsy.com
- Amy L. Bernstein, "The Case for Shrinking Your Novel", Jane Friedman: janefriedman.com
