Neither of those would work. Even if they don't have a past they can still be erased from existence or banished to another dimension/time period. And again, Kabr could simply erase the Eridians from existence. And one last detail b4 I go to school, The Vex don't rely on tech to give them their power, their power source resides in another dimension outside of time which atleast as we know, cannot be comprehended by any known being but the Vex themselves and Kabr. [spoiler]it was good debating with you.[/spoiler]