looking to create a town next to a dungeon that changes shapes and always has creatures in it. how big of a city would spring up next to one? /u/Dragoncharming DnD: Roll for Initiative!

as the title says, working on creating this idea for a while but i got stuck on how big of a city would be there. would it be small outpost? or would it create a full on large capital city? a lot of questions came to mind and this is the first i’m answering so could use some other impute.

as the title says, working on creating this idea for a while but i got stuck on how big of a city would be there. would it be small outpost? or would it create a full on large capital city? a lot of questions came to mind and this is the first i’m answering so could use some other impute.