Some say that an opened mind for psionics leads to a peaceful civilisation, but if you want proof of the contrary, you must only ask the Kuraan'voll why they are.
Venia Khaf, Archsage of Generation, Rider of the Protean Waves
Created by the Voiceless Talkers to perform the tasks that they deemed below their "supreme intelligence". The kuraan'voll (also called the Astral Riders) were bestowed with psionic capability, to aid their creators. In the centuries following their creation, underestimation from the synliiroi, determination of their people, and a touch of luch was just enough to liberate themselves. They now find themselves orphaned and without a home, the kuraan'voll are nomads of the Protean Sea.
You'll mainly find the kuraan'voll aboard ships known as Protean Riders, sailing the Protean Sea, raiding those unlucky enough to find themselves defenseless. Though it is possible to find cloisters and tribes across the many planes, the most well known location on Consarcio where you can find the kuraan'voll is on the Island of Müniin.
The kuraan'voll possess a mind for processes and systems, innately understanding how pieces fit together. And thanks to this fact, they're able to create incredible pieces of machinery using scraps from the vessels they pillage.
Not only is this technology impressive given the materials they're using, but they fused together psionics and mechanics the same way arcano-tech is being developed on Consarcio. Using the power of their mind and the stars of the Protean Sea as one.