I downloaded a few resources to run a game for a new party in my existing world. I chose to run this one, and created 4th level characters to explore it. This is a very challenging adventure for 4th levels and we are only part way through it!
Clumsy and somewhat unused to working as a team, my group were unable to deal with the threats individually and were in serious trouble, but I had the two factions turn on each other, and then the trapped azers came to their aid.
They haven't crossed the lava lake yet and are all pretty beaten up.
I am looking forward to the next session and torturing them further.
I would only have two criticisms; 1) that a 6th level party would probably be more suitable, 2) It is not clear how the sword helps remove the curse, or indeed what the party could (should) do once shifted to the other plane in order to lift the curse. and that is kind of important.