New Fable 5 can build a dungeon generator — a prompt found on Twitter that tabletop RPG fans will want to try

According to users who tested it, the model outputs a working layout in a single pass, without requiring multiple rounds of corrections or follow-up prompts. The generator reportedly produces a text-based map along with a short description of each room, making it easy to use directly at the table during a session.

Some fans have also experimented with adjusting the prompt to add specific themes, such as dungeons built around a particular monster type or environmental hazard. Because the output is plain text, game masters can copy the result straight into their notes or a virtual tabletop tool without extra formatting work.

The approach is being seen as a low-effort way to generate fresh content for one-shot sessions or to quickly fill in a side area during an ongoing campaign.

It’s worth noting that, as with any AI-generated content, results can vary between runs, so some manual tweaking may still be needed for balance and consistency. The prompt itself is quite long, so it’s been uploaded here rather than posted in full.

What makes this particular prompt notable isn’t the idea of AI-generated dungeons, which tabletop communities have experimented with for years, but the single-pass reliability users are reporting. Most earlier attempts at this kind of generator needed several rounds of follow-up prompting to fix inconsistent room counts or nonsensical layouts.

The parameterized structure — room count, linearity, decor density — is also what makes it reusable rather than a one-off novelty, since a game master can tune those inputs for a quick side dungeon versus a full session centerpiece without rewriting the prompt from scratch.