The Plinth is a side-trek adventure that is suitable for a party of 3rd to 5th level. A party that contains a dwarf or a thief will be able to gain some additional insights, but neither is required. A character capable of detecting magic can be helpful.
This is the kick off for the Sidetreks. Sidetreks is intended to be a collection of brief encounters that can be used to fill-in the gaps in an otherwise planned campaign.
Generally speaking, each Sidetrek should have enough details and activities to occupy an adventuring group for a short time, less than an hour in most cases. While too short to fill an average gaming session, they can be used to extend a session or allow players to have some less threatening or stressful interactions. Sometimes you just need to have a little extra to break up a long travel session and make it seem less like an endless land of boring.
Anyway, I hope you find them useful.
-- L