McMarligan's page

As succeeding on a saving throw against this aura does NOT grant immunity, while within the aura, you continue to make saves every round.

Since the effects stem from the same source, their duration overlaps rather than stacks. Each time a save is failed, use the higher of the remaining duration or the newly rolled duration for each individual effect.

Thank you very much for clearing that up so nicely.

Greetings and salutations!
First of all I want to say, that the advice and stories here really helped me a lot with the campaign, so thanks to you all. :)

So, my players are about to face the Star Seed and I am a bit uncertain about how it's Unspeakable Presence works.
Do the players have to make a saving throw at the start of each of their turns? And if they fail multiple saves in a row, would the duration of being nauseated and sickened then add up or do I take the higher result?