
Go back to the the Aetherochemical Research Facility and read the flavor text again. Allagans "invented" artificial voidsent.
What Eorzeans refer to as "The Void" might be the fallen 3rd reflection, but voidsent could have existed before then.
As far as we know, at least two of the worlds have fallen. 3rd and I think Warrior of Darkness said his was 6th? I can't remember if more had, but it's certainly possible. All we can be sure of is that the original world (which is what we're playing on currently) hasn't fallen, but it's the current target. Or perhaps the Ascians are trying to destroy them all together. It stands to reason that all the worlds need to fall to maybe merge them back together, which would prove as a catalyst to revive Zodiark.
What Eorzeans refer to as "The Void" might be the fallen 3rd reflection, but voidsent could have existed before then.
As far as we know, at least two of the worlds have fallen. 3rd and I think Warrior of Darkness said his was 6th? I can't remember if more had, but it's certainly possible. All we can be sure of is that the original world (which is what we're playing on currently) hasn't fallen, but it's the current target. Or perhaps the Ascians are trying to destroy them all together. It stands to reason that all the worlds need to fall to maybe merge them back together, which would prove as a catalyst to revive Zodiark.