Haha I like the idea of little goblins running out of holes and stealing treasure from the dwarves. Sadly it would have to be only a visual/flavor thing that functions like a temporary mountain's ore reclaiming, which is kinda annoying, since there's no real mechanical way to interact with them.
I actually have a couple bosses planned! I also have few weather calamities in my notes, such as rain storms that cause lightning strikes and make ore wet so runners can carry less. Or fog that lowers accuracy of turrets and harpoons, as well as giving runners +dodge because obviously it's harder for the sentient rocks to aim their falling trajectory lol ;)
Thank you for the feedback!