So I was thinking about Mercury. Why did the Vex completely terraform the planet? They don't seem to be doing anything with it except for housing the Vex networks. Then I started thinking. What if Mercury is actually the body for the most powerful Vex Mind? And that may be the final boss, an entire planet! Just an idea, no evidence or anything.
-
Don't the vex have their own pocket dimension where they came from, like Oryx and Crota?