Quote Originally Posted by Caurcas View Post
Omega is not an unsundered, but rather a being like Midgardsomr. A being outside that paradigm. Furthermore, it took the usage of the Crystal Tower. A structure build by "lesser" beings.
A structure built by lesser beings with guidance of Asians aka The Ancients. It is pretty much implied that the tower was meant as catalyst to cause the calamity which it in fact did.

The Ancient didn't seem to be unaware of time magic, with Gaia being primary example. It is simply acknowledged by even Cid and Nero that the idea of time travel was unreliable at best, both in it's success rate and the potential repercussions that would happen by creating a paradox. They only went through with the idea because they were desperate. Honestly if the plan was to be public knowledge there would have been opposition as well. Sadly since our source is only one sided we never know of it.