I'm trying to find that adamantite vein. Where exactly is it again? Which cavern?
Keep the digging straight down from the lower stairs, in the level -15 there is a cavern wich the adamantine vein. Are you going to do a "Valley full of cyclops, done right"?
That is the plan actually. For whatever reason, when I opened your save, my tileset got goofed up, so maybe I just need to refresh that via the Lazy New Pack, because I can't clearly see the adamantite graphic. I've dug stairs down literally all the way down to the semi-molten rock but not found it yet. I've seen bits of the cavern on -15, so I'll keep probing around there.
On the plus side of things, I did have a 28-dwarf migration get slaughtered by all of the cyclops.
You are experimenting the joys of the Abysmal Post
I'll give you more specific directions
Here is the dining room, wich I think it was builded in the save , and at the level -15 directly bellow
the walled part up to the left is the adamantine, if you are going to release the demons remember that they are very overpowered. In my fort I managed to save a few immigrants inside my fortress while the demons were busy murdering the wildlife
WELCOME TO THE FUCKING ABYSMAL POST! Hope you like death and fire!