Old Zerkonian Ghosts

The Old Zerkonian Ghosts is a myth or belief that beneath the capital city of Zerkonia, deep in the Undercity lies the spirits of those who have perished to build the Undercity and those who have died during the nuclear conflict at the end of The First Great War. Explorers who go down to the Undercity have mentioned seeing shadows and movements around the structures, people have said to have felt being watched from the darkness. The spirits are believed to be harmless and only there to watch those who travel to the Undercity.
The construction of the undercity lead to at least 3000 deaths from work accidents.
Some citizens who believe in these spirits would frequently travel to the dephs and leave food and drink for the ghost workers who want to carry on with the construction, yet being unable to due to being in spirit form.