Cause of ascian calamity and rejoining elemental

[MrThinker]

We also don't know *how* the Ascians sacrifice to Zodiark, we're only given glimpses of a few Amaurotians vanishing while in line at the DMV. It's very possible Zodiark doesn't care how the sacrifice perishes, just so long as their Aether goes to him - as that is what all Primals require, Aether. It should also be noted that the umbral polarity of the gas may very well just be turning the land to an inactive state, similar to that of the Empty, but not quite so extreme.

I'd assume it is something similar to how that one Ancient at the end of Akademia Anyder sacrifices his life energies to create Quetzacotl. Except instead of themselves theu use others.