What exactly is the goal of this thread?
EDIT: To clarify - are we just fleshing out background, or is this going to turn into a card design series?
Regardless of which, I'm of the opinion this should be split up into parts so that we're not overwhelmed with all 66 combinations. I think starting with the opposed Elements (Gravity/Entropy, Time/Aether, Death/Life, Light/Darkness, Air/Earth,Fire/Water) would be the easiest thing to do.