We still have a few mysteries left to uncover out there. Notably auracite, both black and white.

We know that it caused everything from Ultima, the High Seraph in the Ivalice raids to the entire raid series of Pandemonium.

But we still don't know where it came from, other than "outer space." And the Omicron and dragons don't have anything to do with it.

So there's something dangerous still out there.