I don't understand why you have Novas here. Even if you gain some fancy 'ability on a creature' with Mutation or Pandemonium, you won't be able to use that ability so much with just 2 quanta. I'd take out Novas for
-Pendulums in order to get more
to use Eternity.
Putting in little more
wouldn't hurt. Precognition to see what you want to Antimatter, and Golden Hourglass to get more cards faster. I'm also big fan of Butterfly Effect, but I'm not sure how to make it work in this deck. There's not that many good critters that can use it in un-upped deck - Fate Egg could work, but at the same time that could change the deck too far from your original version.
All-in-all looks pretty good for <1500 coins deck.