[4.4 Discussion] "Change the Future"

[Kallera]

It could be Zodiark using Alphinaud as his voice like what Hydaelyn is using Minfilia for.

Um...It's possible!

So about the Flood of Light...I have a theory.

What if its from the alliance using the House of the Crooked Coin?

The House of the Crooked Coin already has a belief among the Dotharl that if you die there, you do not reincarnate. A flood of light is described as Fate where the soul experiences neither life nor death. And the alliance is planning to make The House a battery for its air defense shield, one similar to Azis Lla.

Now, the Garleans, are currently one order away from counterattacking Ala Mihgo...and their ships need to take the route through the Burn... so assuming Varis can't politically hold things down(Quite possibly from someone's assassination attempt...)
The Garlean troops see this shield in the Burn, go "Hey, didn't Cid make a thingamajig to break through this sort of thing? Let's super size that." They stick that on their Big Ships, and have a go at forcing through the shield. Now that cranks up the juice at the House of the Crooked Coin...Which, either through the assault to break through or the tech connecting it to the shield failing...goes out of control with the energy demand and unleashes its power unhampered...All that un-reincarnating power...

And there is your flood of light...