: My tentative guess right now is that given we have really no way of knowing
: how thorough the Precursor genocide was, the Endless might have been
: another creation of theirs? I guess the question is whether the timeline
: would really make sense for them to devise a species that would be immune
: to the Halo Array (or, leaning on the suggestion that #NotAllPrecursors
: were the baddies, perhaps it was a way of protecting them from the Flood,
: and that in turn granted them immunity from the Halo effect? Would have to
: be some sort of exotic biology, then.)

Weird thing is...

if they had just been locked up in that room then this is a better fate than what all the other species got.

Our races get wiped out then reseeded so no individuals survive the firing.

You wonder if the Forerunners just lacked communication skills...