Hiltunen used his new world as the setting for a series of short comics titled Praedor, published in the Finnish role-playing game magazine Magus.

He called the comics' protagonists "praedors" — adventurers who explore the old ruins in search of magical artifacts.

In 2020 a new version of the RPG came out, split into Pelinjohtajan kirja (Game Master's Book) and Seikkailijan kirja (Adventurer's Book) The next year, Hiltunen followed up with another graphic novel based on the Jaconia setting, Kuolleen jumalan palvelija (Servant of the Dead God), and Vuorela wrote a Jaconia novel, Vanha koira (Old Hound) in 2004.

[5] Jaconia is a circular land roughly 2000 km in diameter,[6] populated by a medieval society with a strict caste system.

It is surrounded by the "cursed" land of Borvaria, in reality the ruins of a huge city, all that remains of a highly advanced society that was destroyed in the distant past.