They appear to be the top of the chain, one Natarian scholar went so far as to consider the possibility that many of the abominations were direct results of its influence and urgings.

Further passages from the journal we studied had been badly damaged and there seemed to be an argument about the Possessed Ones, it appears that slain Natarian heroes rose again as vessels of demonic will. The argument was on the nature of the return, had they made some damning deal on expiration or were they unwilling tools forced from the eternal sleep?

I have recently posted what I believe to be item 58, a depiction of the Mastered Ones. My research concludes that they were in command of the most powerful sorcery, able to topple Natarian structures on a whim… One wonders how the Natar prevailed against such horror, perhaps it was the key to their decline and absence.