“ The members of the party has unknowingly been infected by a mysterious plague and have been spreading the virus for quite some time now while adventuring. They start to hear rumors of all the cities in quarantine after they travelled trough. Will they discover the source of this? Will people start to avoid them, try to kill them?”
“ Mining in a certain area turns all exposed skin (maybe just parts that are actively disturbing the chemicals that cause the reaction) of the those doing the mining to a dark blue color. Will wear off taking as many years/days spent in the mine. ... meeting a party of blue-skinned humans armed with pick-axes etc. Strange disease? Demon offspring? Curse? If they meet only one ex-worker, they will very carefully listen to any stories he says, no matter if drunken or insane, or just makes up to get a beer.”
“ When the campfires grow dim, stories are told. Stories of lost cities, great heroes and legends of old. One of these is the story of Knurlheim. Once the proud capital of the Dwarfs, now a ruin- abandoned long ago. Filled with vast riches and treasure. It's secrets forgotten with the decline of the Dwarfs, long ago. No one knows is certain if it ever exsisted at all.”