Narflung:
Well, the title pretty much says it.
I was looking at the base malificant made for his army at https://discourse.chaos-dwarfs.com/t/7693
and came up with the idea of a volcano with an aqueduct cut into the side, to divert lava (eg, into a lake, or some lava powered workshop)
The downside is that it would be a rather large piece, which doesn’t really help me out.
I had many ideas stemming from this, such as the volcano being used for the hideout of the Black Dwarf, from WD 200(ish) fame