***TRIALS RESPONSE*** Cool deck here, really haves a lot of synergies in it.
But I still laugh out loud at Supernovas, why are those aren't needed, changing those into novas and changing the mark to death according.
This type of deck can rush and stall almost everything very well. It beats a lot of stall types(Mostly naming Firestall, Dimensional Shield spams and Antimatter spam decks)(Of course if you don't draw with sundials), and a lot of rush type decks(Mostly naming Immolation/Golem rushes, Rainbows speed decks and different mono rushes).
I would like to upgrade all the deck, but upgrading the sundials will screw the auto-mulligan, giving you some 0 novas, 0 pillars decks(which usually will make you to loss) and upgrading Supernova will make your deck much, much weaker(As I already mentioned). So upgrading Chrysaora to Physalia is a good upgrade(+2 damage, as you wont start sundialing from the start(unless you are against a very, very fast deck)).
The last chance I would do is to change a Sundial for another Physalia or changing the Improved Fog for Physalia, that would give you a good enough damage boost and wouldn't take away a lot of your stalling power.
With all those changes, the deck would look like this:
Hover over cards for details, click for permalink
4vj 4vj 4vj 4vj 4vj 4vj 5rp 5rp 5rp 5rp 5rp 710 710 710 710 718 718 718 718 718 718 71a 71a 7gl 7gl 7gl 7gl 7gl 7gl 7n0 8pk