Aether

[Keroa]

This also neatly explains why the Primals require not only aether and crystals to exist, but also worship, as well as how beings like Good King Moggle Mog the XIIth, even an ACN's Carbuncle can exist despite not being a Primal - with enough aether/crystals and a strong enough will a person could make even the most abstract or intangible desire corporeal. Pretty much, a 'wish made manifest'.

Oh goodness, this is actually an aspect of Crystals I have not even thought to question, as well as a door to more questions, I am still curious as to how crystals are formed. I know how they form in our world, but I wonder if the process would be similar?
Also: how would you think, if a persons Aether has become corrupted, to purify that coruption? Assuming any new Aether introduced would also become corrupted and ultimately take it's toll on the body (like what you see in Pharos sirius)

[Wolfandre]

I guess the real question is: why does Eorzea have more aether than the rest of the world?

Honestly? It's because Eorzea is the setting of the game and it's special because it is. We haven't really been given a better answer other than that, as of yet. :/

Oh goodness, this is actually an aspect of Crystals I have not even thought to question, as well as a door to more questions, I am still curious as to how crystals are formed. I know how they form in our world, but I wonder if the process would be similar?
Also: how would you think, if a persons Aether has become corrupted, to purify that coruption? Assuming any new Aether introduced would also become corrupted and ultimately take it's toll on the body (like what you see in Pharos sirius)

Well, it could be as simple as being akin to amber, which is just hardened/fossilized tree sap. Aether is exposed to the elements and just hardens in reaction to its environment.

We see in the portion of the main scenario just before Garuda that exposing overaspected aether to a source of aether has major effects on the source. It could be, again, something as simple as a treatment of overaspected crystals of the element that you are corrupt by. However, if aether poisoning/sickness is anything like radiation poisoning (as the game parallels us to), that stuff is going to have some pretty wicked effects on the body, and adding more aether to the mix is only going to make things worse (like trying to fight off radiation with radiation). If a person's own well of aether is corrupt, you could probably kiss that person, as you know them, goodbye.