Deebo:
Thanks HB I found a thread that I have not seen before
https://discourse.chaos-dwarfs.com/t/7802
But still not all the info I am after although I did find out some new stuff like the Vampires attack with the crown which I found very interesting and will make this campaign evan more interesting as we write it up!
At the moment from all I have heard I am thinking a large roughly rectangular rock in a chamber at the bottom of a mountain. The rock is kind of distorted, maybe has faces or something that can be seen in the rock and the colour would be a dark green that looks black or maybe a black rock with strange green effects on it.
These are just my ideas so far and I am still open to and welcoming any ideas and or information on this subject.