I have this theory. That the cabal aren't just afraid of oryx. When you look at it, it all stacks up. The cabal are afraid of the fallen. What would a giant militaristic nation be afraid of??? A larger army than theirs. So you ask, how would the two even know about each other? Servitors and psions. They look like they came from the same planet, right? But that is not enough. Psion in roman times were imprisoned soldiers. The only reason the fallen look up to the servitors is their ability to provide ether. My theory is that the cabal and fallen met up on the psion/servitor home world and had a war for its inhabitants, and everything got divided up. This would make sense seeing as both races love to conquer other places. Maybe perhaps when the traveler was at the psion/servitor homeworld. The cabal are running from the fallen because they saw their might on this planet. And we can be sure of this due to mars being the only place in the game the fallen are not at. They are afraid.