When I indicated that I could help out slightly before I would leave, at least by helping train some warriors, the Blackrock dark dwarf tribe became even friendlier towards me.
Not only did they voluntarily tell me about their teleportation portal, they even brought out some magical gems as payment. I felt rather awkward about their generosity.
Unlike their relatives, the gray dwarves who lived in the Underground, these dark dwarves were truly simple-minded. Still, it was quite easy to understand why. The gray dwarves had been exiled because they were too evil, while the dark dwarves had been exiled because they loved warfare too much.
But from what I could tell, no matter what their ancestors were like, these current dark dwarves weren't warmongers at all. At the very least, they no longer wanted to fight against everyone now that they were in the Chaos Abyss.