Mors Mundi
The Mors Mundi prophecy predicts that an outsider will take over as the Clostator, the leader of the Bastion, and will destroy the Bastion organization from the inside. The prophecy is thousands of years old. It originated in the Jorogumo culture.
The prophecy is little known outside of the Bastion. Even within the Bastion, most think of the prophecy as an old wive's tale, a bit of ancient myth that was lost along with the extermination of the Jorogumo race.
(note: I need to decide if people think the race is wiped out, or it is known they are imprisoned below the Bastion -- that is why the Bastion was built in the first place, to sea the Jorogumo in for all time.)
Mors Mundi
The phrase loosely translates to "Death of Worlds."
Mors Mundi will be an individual person, whereas the Mors Mundi Prophecy is the prediction that Mors Mundi will be sworn in as the Clostator of the Bastion. The Clostator is equivalent to the Pope of the Catholic Church.
The History
(Move this to the Jorogumo page) The Jorogumo culture once dominated the Patchwork. Jorogumo wizards have a unique kind of magic known as "serecumesh," also known as "silk magic."