Dorateen
Arcane
So far this game is a lot more brutal than Pools of Radiance, but not in a good way. I am currently taking on a beholder in his lair along with his minions.
This adventure was fairly open exploration, after the initial starting town. That is, you can choose which location to have your party visit next, without heavy-handed direction. It is possible to go to the area you're talking about too soon, and then it can be quite brutal. I recall doing that first, and it was tough, but felt so rewarding making it out of that area alive.
Not the best of the Moonsea tetrology, but still ranks up there.