So, I was in level 2 of the Dwarven Halls and came across this sucker:
Pasiatrius.jpg
Pasiatrius, the Great Black Wyrm. Doesn't a named monster like that denote an artifact on the level? I didn't find any, at least. There was a tension room of hill giants and ettins and the best loot was like quarrels of construct slaying... What's up with that?
I did end up sacrificing him at that chaotic altar after fighting him for quite some time. Was that artifact lost when he was sacrificed?