So much yes with this, I want to build a similar deck. Myth Realized was an all star in pre-release and I feel like it'll just creep up in price like Mastery of the Unseen

I defiantly see it blowing up in some format. Probably somebody will have a home for it in modern.

What happens when your opponent doesn't run very many / any creatures?

Then I cry.

Counterspell isn't modern legal.

omg my b

I'd say you really don't need more than 20 lands in here. Old R/U Delver decks ran 16-18 lands and had a similar CMC to what you have. I'd say 20 is more appropriate here since you run 4x Mana Leak and 4x Remand, in addition to the 2x Supreme Verdict. I'd also say that 4x Snapcaster Mage would be incredible in here. I'd drop a couple Sleight of Hand OR Gitaxian Probe (or some combination of them) to add in 4x Snapcaster Mage and you will have a much better mid game and you'll actually be able to survive a late game.

You need a 4xHallowed Fountain desperately in your manna base, take out the temples for them. Like previously mentioned you should only be running about 18-20 lands and maybe consider adding red as well because the burn is part of the reason why the U/R delver deck works so well.

I'm working on adding red, but hallowed and sc Mage are good editions. This is the deck I'm currently running, so I didn't add the mages. But I'll put them in to make the list more presentable.