Okay, I was running off Sophia being a life/death/rebirth(zombie) type, not a balance type. This changes things....

Firstly, I am culturally disinclined to trust anything described as "gilded chains". I feel it also points to a second thing the Allagans might have pulled from Sophia. Considering the Fractal Continuum and the beings inside -

Sephirot - Aspect: Growth - used for forced gigantism, and rapid growth.
Sophia - Aspect: Balance/Equilibrium/Harmony - used for getting gene-spliced organisms to work, and might have been useful for neurolinks.

So Sephirot's power lets them grow their experiments in a short time frame, while Sophia's power lets them merge different organisms together and possibly control them (Owlbears anyone?). So what does the Demon Zurvan contribute? Consumption? Absorption? Violation of Rules?

As a final note, assuming the game lore is still relevant, I have to wonder if Fiend's lyrics might be about Sophia and then Zurvan.