[@Fubsy]

This early in creation?
I mean there's not much we can do expect throw sticks/wave wands at each other.

X will bestow the gift of writing. 
His Servitors shall build him a really big library to keep all the knowledge of the planes.
Getting to his library is hard since his plane be the plane between the planes. 
Like if other deities begin creating planes, akin to pages of a book, his would be at the nexus the spine from which all planes touch somehow, but the space between is nearly impossible to pass unless you were somehow able to modify the thickness of each page such that between the writing on one and the writing on the other there is a gap large enough to write upon. 

Although X is probably going to be a rather bipolar God who sometimes may assist Xeaniax in progressing society, or hinder it. 
I'll probably play him as a composite of Boccob + Ioun + Vecna.