Aaaaaaand, as I usually do, I find myself drifting to a blue control deck again in Modern. Thanks to the new fetchlands, this deck I'm playing a lot on untap.in right now is actually close to within my budget range, though it still requires Cryptic Commands and Scalding Tarns, which, to put it lightly, haven't gone down in price lately...
Basically, I took Blue Moon, took out all of the main deck Blood Moons since they're pretty useless in Modern right now, and replaced them with Dig Through Times. It's a satisfyingly slow control deck that needs to fully stabilize to win, but stabilizes hard. Dig Through Time is suuuuuuch a good card. It feels so much more satisfying than Treasure Cruise. I'm not upset at all that we're forced to play with these cards that are possibly too good. They make for very interesting games.
Plus, with Dig Through Time, you can get so much value chaining them together that it's like a protect-able Sphinx's Revelation. Also, it lets you play a bunch of one-ofs since you can dig (slight pun intended) so far to find them, which is the reason my sideboard has so many ones. I can be a bit more diverse.
I've been going back and forth between Thought Scour and Serum Visions a lot, though. Serum Visions is obviously the better card: it sets up your draw, it's good any part of the game, and being a sorcery is almost irrelevant given that it's only one mana. My deck can fuel a Dig Through Time, no problem, so the mill element of Thought Scour isn't as good in the early stages of the game.
However, late game, my graveyard gets somewhat pinched in what I can afford to exile since multiple Dig Through Times actually can take their toll. This is why I preferred Thought Scour for a short while. It's a Dark Ritual in regards to Dig Through Time, is instant speed, but suffers since there's not a good reason to mill yourself when there are one-ofs you might wanna dig to, and having a random draw is so much worse than the setup Serum Visions gives you. However, the fact that it can help make the 2nd, 3rd, and 4th Dig much less painful made it a worthy consideration for a while.
It's a decision I can't make a final call on. My latest version is running Serum Visions, and I want Thought Scour back, even though I felt like I wanted Serum Visions more in the Thought Scour configuration. I'm trying to think of a way to incorporate both, which I tried once when I decided to make the deck mono-U.
(For the record, mono-U is terrible because it has no removal. A splash of another color is necessary.)
So, finally, here's my list. Thought Scour and Serum Visions are combined since I haven't decided between the two yet:
4 Snapcaster Mage
3 Vendillion Clique
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7 Creatures
4 Thought Scour/Serum Visions
4 Spell Snare
4 Lightning Bolt
2 Spreading Seas
2 Mana Leak
4 Remand
2 Vedalken Shackles
1 Electrolyze
2 Cryptic Command
1 Batterskull
4 Dig Through Time
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30 Other Spells
4 Scalding Tarn
3 Polluted Delta
2 Flooded Strand
3 Steam Vents
10 Island
1 Mountain
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23 Lands
Sideboard:
1 Vandalblast
4 Dragon's Claw
2 Spreading Seas
1 Negate
2 Sudden Shock
1 Threads of Disloyalty
1 Blood Moon
1 Anger of the Gods
1 Counterflux
1 Keranos, God of Storms
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15 Cards
EDIT: I just switched back to Thought Scour for now. I forgot a major reasoning: having Thought Scour makes having 4 Digs and 4 Snapcaster less impactful. Milling non-instants/sorceries is always welcome, since you'll have a lot of fuel for Delve that still lets you have targets left for Snapcaster. Plus, the reasoning I mentioned above about making the 2nd, 3rd, and 4th Digs much more playable.
EDIT2: The decision is still up in the air, though.
EDIT3: I made room in my sideboard for 2 Sudden Shocks, and may go to a third. It's the only thing that can reliably kill everything in UR Delver without them getting still getting value, since it kills Young Pyromancer before they can get one last Elemental, and it doesn't let them save Swiftspear. If I stay with just 2 Sudden Shocks, I need to decide whether my one sweeper will be Anger of the Gods or Volcanic Fallout. I'm leaning toward Anger of the Gods since Pod is still apparently a strong enough deck in Modern, but I like that Fallout is uncounterable. For now, I'm on Anger.