wow. This is really good. Impressive how you jammed pack l of it to this concise document.
I would love your take on a couple of things:
Plot hooks - besides missing donkey, any clues for PCs on Nivendar or the rings?
When picking up a ring, or even wearing it, do they get a sense of its power or of what pledge is required of them? What would be ways to obtain that info?
Random encounters: many of them seem to fit a specific room in the dungeon only. What happens if they are rolled when the party is elsewhere? Especially as it is deadly (roll each round) this is very likely to happen.
Where would be a nice place to plant some info about Nivendar and the rings? Some mural somewhere, or maybe a history part in the book of names?
great work,
Keep writing,
Can’t wait to run this…