Prophecies

Studying the artefacts I've stumbled upon authors that link the "holy rock" at the center of the labyrinth to a prophecy about the apocalypse - by a Gallentean, nonetheless. In the prophecies of Macaper, the third disaster that befalls the world before the apocalypse is “roaring stone that silences the world.”

Usually this is associated to an asteroid impact on Rumida a while ago. This low-angle impact resulted in a blast so loud that it deafened most of the planet's population - hence the silencing of a world. So, commonly, this part of the prophecy is considered fulfilled. 

However, there are some that claim that this part of the prophecy is related to the space rock worshipped by the Takmahl, and that it will still do something. Something that the Takmahl knew, and worshipped it for. The believers in this theory tend to be conspiracy adepts - many of whom also link the lost Takmahl civilization to the Triglavians. If that sounds wrong to you, that's because it is. The space rock was first considered special by the Talocan, and they -or the various Jove offshoots- are much more likely to be linked in some way to the Triglavians.