When arcanotech fails, it fails spectacularly
The fine scent of sea, and the less fine smell of the fish… isn’t there something else smelling, too?
The dwarven gods true names can only be known by dwarves. They are referred to by nicknames in the presence of non-dwarves. I.E. Gudurran( Allfather) Baenna ( Hearthmother) Dudrak ( Ore), etc. No torture or magic or direct intent can reveal their true names to non-dwrves.