What is exceptionally frustrating about this adventure is the large number of "you can't solve this yet" missions that are present - I'd say easily 1/3rd or more of them; then they're presented in a way that you can't find out what you need to solve the problem in advance; and there's only a specific solution. To make matters worse, the module recommends milestone XP for "solving the missions" - so once you start down that path, there's no half XP for "kinda dealing with the problem."
Specifically with the caster behind the magic door, it's someone who can create her own food and water so she could outlast the party at a siege.
For those interested in the identity of the adventure, I'll put it in spoiler tags: Rime of the Frostmaiden.
Specifically with the caster behind the magic door, it's someone who can create her own food and water so she could outlast the party at a siege.
For those interested in the identity of the adventure, I'll put it in spoiler tags: Rime of the Frostmaiden.