I don’t think tapping 4 lands on their end step is horrific when the game has gone long and both players on 8 mana or more. Likely than not, we’re both desperately trying to draw fuel; maybe we need to find the ghost quarter or be beaten to death by a colo. Or a snap to close out the game. Perhaps we’ve experienced different draw-outs, but I typically die because eventually we just “skip” draw steps. (after all, drawing dead fetches is as good as a skipped draw), while they happily discard excess fetches to find more gas.

On the other hand, I can also see the benefit of naming human with cavern and not having to worry about cryptic command catching a late snap or tas.

I’ve had Lighthouse as a consideration, but I don’t think it’s as good as any of the three lands I named. Tapping four lands is a serious cost for minor utility. Many games are won and lost over Snap/Bolt wars, and you really can’t mess around with activating it. Drawing dead fetches can definitely suck, though it’s a pretty minor thing.

I think ghost quarters are an excellent idea. I never want terminates until colonnade goes live, which is an awkward position to be in.

Temur Delver is one of the Proactive Vision decks that I experimented with briefly. I was also hopeful, though I haven’t been able to find it.

The two lists you posted look like good fits because they address the cards drawbacks, but man I really wanted a Temur or sultai midrange deck to rise up with vision 🙁

Young Pyromancer just isn’t good in Modern anymore. Before Treasure Cruise it was played because there was no other option, and with Treasure Cruise it was great at further compounding the advantage that Treasure Cruise generated, though currently Tasigur and Gurmangler are just better cards. It’s too fragile, and in particular Lightning Bolt and Abrupt Decay make it unappealing.

I’ve had the second K Command and even additional sideboard copies at various points, though it’s just not especially good right now. You want one to make Thought Scour/Snapcaster excellent, though against basically all of the linear decks it’s too inefficient as a spell. Electrolyze is also way too inefficient, and I only like it when Lingering Souls is very prevalent in the format because that card so easily leaves you behind on cards and Electrolyze is one of few tools that lines up very well against Souls. Everything else that Electroylze is good against isn’t really a problem- it’s too inefficient against decks like Infect and Affinity for a deck this lean.

No offense, but I’m not going to write out several sideboard plans for a comment section, and sideboarding is something you feel out as you play the deck. I will offer you one piece of sideboarding advice, as it doesn’t seem intuitive, but you board Delver out against both Burn and URx control decks. It dies too easily, and your plan is either Tasigur or to Countersquall/Bolt them to death. Games against Burn are often very close, and the fact that Delver needs to flip to block favorably in a matchup where you would rather be blocking than attacking is bad, and Searing Blaze added on top of this fact makes Delver too much of a liability.

Against the UR control decks, you don’t want to have to counter every Electrolyze/Lightning Bolt, so Delver just dies too much and is a horrible topdeck, which is why he sucks there. The deck’s ability to win long games against them is greater than you might think.

This is an incorrect line of thought when considering Control decks that are viable.

Jeskai became Tier 1(By representation of course) because it gained an “Oops i win” button in Nahiri/Emrakul.

That´s why Grixis is just a bad deck, a watered-down Jund if you will.

You certainly don´t have a proactive plan, and like you said, you just sit in your hand trying to respond everything. Modern certainly doesn´t have the tools to have this kind of decks. To be more clear, there´s no Force of Will.

Proactive decks rule Modern, period.

Also, regarding the Jace comments. I believe Jace is broken. Does that mean it wouldn´t help Modern? No.

The problem with Jace is that it doesn´t “combo” like Nahiri, but it´s just too damn consistent, and it is a win con on its own.

It definitely a card to watch out in the future.