Ok i been looking at some little hints and i came to believe that the vex are made by cabal or at lest were. Why do i believe this? Well if you go to Io where the “Postmodern Prometheus” adventure enter ends; you can find a scannable. When you scan it your ghost say it’s vex but it seems ancient. If you do the “arms dealer” strike; at the end the center object looks a lot like the scannable. Now the do the “the runner”. At the end it say that the cabal was carrying data on something part biological and part mechanical. Just like the vex. Let me hear your thoughts on this theory and if you can find any thing else.