Quote Originally Posted by Big-Isaac View Post
The whole "flood of darkness" thing doesn't make a lot of sense to me, tbh.
"Darkness" and "Void" are not supposed to be the same thing. Darkness is just another element like fire, water, light or wind. Void meanwhile isn't an aspect; it's the lack of all aspects. It's supposed to be some kind of entropic force that tries to reduce everything to nothing.
So if a flood of darkness turned the 13th into void, then how is a flood of light supposed to fix it?
Terms in FFXIV are much more specific then how you are portraying them here.

Darkness is not an element in FFXIV. It is an energy type, specifically the energy type associated with "activity". In the same way, Light is not an element either, but the energy type associated with "stasis". All elements can be charged with either of those energy types. The effects of the charges are what the elemental polarities are. You have Astral polarity for "active" aether (aether with Darkness energy). And the Umbral polarity for "static" aether (aether with Light energy). Neither are better or worse then the other either. Both are needed and both can be bad under the right circumstances.

In a similar way, the Void isn't just void of elements. In fact, it's even void of entropy. Entropy would probably be considered "Darkness" in FFXIV as Darkness if anything. The Void is called the Void because there is no aether in it.

It is very, very likely that what the Ascians told Cyella was completely made up so that she would help them create the circumstances for a Calamity of Light on the 1st Shard. They do like manipulating people a lot.