1. Home
2. Blog
3. Build your first story world

Guide · For creators

How to build your first story world with an AI world builder.

Everyone has a world they used to daydream about on the bus. This is how to turn it into a place someone else can walk into, in one evening, without writing a novel first.

October 11, 2026 · 8 min read

The most common mistake with any world-building tool is starting big: forty characters, three continents, a magic system with footnotes, and nothing anyone can play. The advice in the Dai Novel docs is the opposite, and it is the advice we’ll follow here: build one small, connected world first. Test it. Then add the details that make it yours.

You will finish with a premise, two characters, one place, a three-step arc and an opening scene. That is enough to play.

Before you open the editor: one “what if”

Write one or two sentences that hold three things: the central idea, the pressure that keeps coming back, and the tone. For example:

What if you were reborn as the least promising disciple of a dying sect, and the only teacher willing to train you is the one the elders exiled?

That sentence already has a hero, a pressure (the sect is dying), a relationship (the exiled teacher) and a genre. If you are building your own isekai, cultivation, mecha or pirate world, start the same way. The rest of this guide grows from it.

Step 1: Create a blank world

Open your Codex, create a blank world, give it a name and choose the language it is written in. You land in the World Editor. Every part of the world lives here, in structured fields rather than one long prompt, which is what makes it an editor and not a chat box.

Step 2: Write the premise

Open World Profile → Premise. For a first draft you only need:

• A Story Description of two or three hook sentences.
• A short world backstory.
• A few genre tags.
• Three to five world rules with clear costs or limits.

The rules matter more than they look. “Qi can be borrowed from the dead, but the dead remember who owes them” gives every scene something to push against. “Magic exists” gives it nothing.

If you would rather start from your sentence and shape it together, the Premise Architect expands a one-line idea into a full premise, rules and hidden truths included, and is told to keep what you already wrote.

Step 3: Add two characters

Under Entities → Characters, add at least two. Give each one:

• A memorable name.
• A specific one-line brief. Not “a mysterious swordsman”, but “an exile who still keeps the sect’s accounts out of spite”.
• A few concrete tags.
• An appearance description you could repeat to an illustrator.
• A portrait.

Mark only the true viewpoint leads as Main Character. Those are the people a reader can become. Everyone else is the world answering back.

Step 4: Give them somewhere to stand

Create one Region for the broad territory and one Location where scenes actually happen: an inn, a gate, a shrine, a dungeon entrance. Then open World Profile → Map, add a map image and place them on it. Geography you can see is geography the story can use.

Step 5: Connect the cast

Open a character’s Relations tab and link your two characters with a precise, directed relationship, plus a brief saying why the bond will still matter later. Direction matters: a mentor and a student are not the same link read backwards.

If your world uses stats such as HP, Mana or Favor, define them once in World Profile → Gameplay. Keep it light; only define what the world needs.

Step 6: Sketch a three-phase arc

This is the step most world builders skip, and the one that keeps an AI story from wandering. Open Phases and create three connected stages:

1. An entry phase that establishes the ordinary pressure.
2. A first real trial or commitment.
3. A point of no return, or an ending.

Give each a concrete name, a player-facing description and what has to happen to move on. A phase is a story state, not a chapter script: you decide where the story may go; the AI writes how each moment gets there. The Phase Architect can plan a longer spine when you are ready for one.

Step 7: Write the starting scene

Open your Main Character and choose Starting Scene. Put them somewhere with a problem already in motion, and give the reader at least one choice. The first page is the one players see exactly as you wrote it, so make the first line earn the second.

Let the World Helper do the heavy lifting, not the deciding

At any step you can ask the World Helper, the AI assistant on the right of the editor, to explain the world, refine a character, propose relationships, define stats, draft a starting scene or point out gaps. It returns proposals you can read, apply or revert. Ask for something concrete:

Give this character a one-line brief, a stable appearance description, and one long-term goal that conflicts with the faction they serve. Keep their name and backstory.

Small, specific requests make small, reviewable changes. The world stays yours.

Play it before anyone else does

Use Play test in the editor to play your world as a draft without publishing it. You will find things no checklist catches: the rule that never comes up, the character with nothing to want. Fix them, then play again.

When it holds together, add a cover, a banner and a short public page, open Publish, resolve the checklist, choose who can see it and create a snapshot. You can keep editing afterwards and publish a newer version when it’s ready.

Then make it bigger

Once a small slice works, depth comes in passes: another faction, a second region, a branch for a different main character, an ending that costs something. A small connected world is more playable than a large collection of thin entries. Every big world you have loved started as one room.