If you're unsure about a rule and don't know where to find it, just make it up. Don't hold up the game looking for stuff
If you're the DM, read the whole thing before you start. Well, at least to where you want to stop. You said you're doing a One-Shot, so read the whole thing
I play alone a lot [Sad, I know] and I use this and just dungeon crawl -
The deserts in Cir have been slowly, but steadily, expanding. The sages agree that the desert should be holding steady, and the nobility is worried that it will allow the nomads to expand their unofficial territory in the center of Cir. The PCs are hired to investigate any connection to rumors of a elemental earth worms that have recently migrated from the outer realms.
A mysterious Goblin raids the town at night, striking and seemingly vanishing without a trace.
Members of a coven have infiltrated the city's populace and are working their black magic.
Or I could just roll again. Combine that with the random maps, and I can create my own little adventure with my character. Roll random NPCs, loot, plot twits, traps, ect, ect. Helps me because I'm going solo so I can't spoil myself. But it very much helps new DMs come up with stuff as well
