Creating your Underworld

You own the act of mapping the dungeon, inventing the stats for monsters, designing traps to be overcome, and hiding rewards. His Majesty the Worm front-loads this work. Before you start running a game, you’ll want to sit down and sketch out the entire Underworld megadungeon that you’ll be using. Appendix E deals with generating your Underworld megadungeon.

Doing this work over the course of one or two Sunday afternoons frees you from doing weekly game session planning. You’ve done the hard work already. The City Phase will be your trigger to keep your dungeons fresh: this is when you think about how the players have changed the situation in the Underworld, update your notes accordingly, and create new Meatgrinder entries to replace the ones the players have already seen.