Loose Backstory: (if you're already following you know the deal, but here's an abstract if you're new or we move to a new thread when the story opens...)
Hidden from the eyes of the lands of men and elves, there are epics and heroes of evil as much as of good. This is one such story, behind the veil of the dark tapestry, and behind the veil of broken ground in the deepest underdark -- this is the story of the Red Cathexis, and the horrors it issued like a cancer unseen beneath the surface of the world of Golarion.
In 4606 AR, The same year that the world-wound began to open in response to the death of Aroden, the fabric between the prime material plane and that of the dark tapestry weakened. The unimaginable and horrible beings of that place looked covetously upon this new world, and dangers so hideous the simple minds of mortals cannot comprehend them, quickly set to work on encroaching there --
However small the rift, a hole, a pore even - cunning beings set to realizing how they could jump the breach into Golarion. The beings that came forth were in diametric opposition to the gods of golarion, light, order, and the very laws of nature. As such, to simply cross the breach was impossible -- a being from the dark tapestry would be rent from the world explosively as quickly as it arrived. Undeterred, the horrors of that dark place set to creating a device -- a vessel, that would enable at least a fragment of a being from the dark tapestry to enter this world. That object came to be known as "The Red Cathexis" -- No larger than a grain of sand at first, and carrying merely a scintilla of the trueforms of the beings that rode within it -- it burst into existence deep underground, somewhere between Ustalav, Belkzen and Lastwall -- and began to grow.
it is now 4713, and the Cathexis -- now little larger than a fist, is finally large enough to open and release it's forbidding cargo into the underworld. The beings within, such as they are, cannot exist indefinitely outside of a native host, and to be seen as they truly are by light of day or without such cover from the sight of the gods would destroy them utterly. They had forseen this. They were bodysnatchers -- Hijackers of the minds and corpses of mortal beings, and they would use the forms of beings in the underdark to hide their nature, mitigate their relative weaknesses, and embrace their strength.
Their individual motives and goals are unclear, but to be certain they cannot bode well for any being on Golarion. All that is clear for now is that they are hungry, covetous, and malign -- The Cathexis has finally opened -- and they will offend this world, only hesitating in the face of their own destruction -- or the Cathexis they must protect if they are to maintain their ties to this world...
And so it began... (actions can be declared after my next post)
