Quote Originally Posted by myahele View Post
Interestingly enough, Odin is an Eikon, something that's beyond even a Primal:

http://ffxiv.gamerescape.com/wiki/Lo...er:Gods_of_Eld

So that might explain his uniqueness among primals. As far as I know, Odin is his Sword and will then temper anyone who wields it. From there he slowly saps the environment of Aether for himself.
Eikon is just another word for primals. This was confirmed in the dev chat.