Yeah, that assessment is pretty much right for how my decks matchups are. The swarmy strategies are difficult because they don't die to only spot removal. The graveyard strategies aren't bad unless they're devoted combo.

I have no idea if Kiki-chord will be a good or bad matchup. Chord of Calling is countered by Dispel and Kiki-Jiki dies to removal, but they have a lot of really good tutor-able tech. I can play against them much like I played against twin, which is just to establish a clock then hold removal for the rest of the game, which should be effective.

I'm not sure Slaughter Games naming Newlamog would be effective. If they get to that much mana, they get a constant stream of Wurmcoil Engines and Blight Herders from Eye of Ugin, which kinda ends the game anyway. I need to stop their mana with Crumble to Dust or tempo them out really fast to win. The biggest thing with extraction effects is that they usually lose me card advantage. Slaughter Games has the problem of being a 0-for-1 unless they have the card in their hand while Surgical Extraction is worse than Nihil Spellbomb in that it doesn't cantrip and is useless against Living End. I've played Slaughter Games a lot and found it good while Twin was a thing, sorta, but not really worth it anymore I don't think.

The reason I found Rakdos Charm so good is because it is artifact hate, which helps a lot against, well, the artifact decks, which are many. But it's also 2 pieces of hard grave hate to use against the dedicated grave decks where I really need grave hate, while still making a good use of sideboard to combat affinity and tron. I don't need more effective grave hate that's splashable against Goyf and Snap decks because I don't need additional ways to interact with those decks in those matchups - I already have more than enough interaction for them. The times I need grave hate is against Living End, Grishoalbrand, Dredgevine, Loam, etc. So maybe, with Affinity on the rise big time but with graveyard decks still lurking, I possibly should be running Rakdos Charm. It's versatility is so undeniable against a lot of the modern meta.

Fair enough. The charm is good against Kiki chord too if they get careless. What about just having a hard sweeper. Living end decks don't grant haste to their creatures so something like a single Damnation could be pretty good. Also beats the go wide with lord decks.

I would love to play a singleton Damnation.... but it's expensive. I'd rather get a third Snapcaster Mage than a Damnation if I have that much money to blow. If eternal masters is a thing and it sees a reprint in there I'll pick one up, but until then, I'm either playing Languish or nothing. Unfortunately, Damnation just isn't a popular reprint pick.

Crux of Fate is another pretty good option. It may cost an extra mana, but it does kill off some creatures which Languish will not.
Echoing Truth is going to be the best enchantment hate you can get without splashing a fourth color. Personally I'm a huge fan of Leave No Trace, but Echoing Truth has a similar effect.
Given twin's absence, would Dreadbore be worth running over GftT?
If go wide decks are really a big issue, something like a sideboard Blasphemous Act is probably a bit extreme... but effective nonetheless.
Sudden Spoiling could also be pretty fun, but the amount of set-up required to make it work probably makes it unplayable, even as a sideboard card.

Crux of Fate is too much mana. In a turn 4 format, I need a turn 4 boardwipe. I also can't hit the mana consistently enough to pull it off.

Echoing Truth should be just fine, and I am very hesitant to splash another color.

Go for the Throat is meant to be a non-red removal spell so it can hit Master of Waves and Phyrexian Crusader, both of which are problem cards for this deck.

Thanks for all the suggestions though! If I never see any potential cards, there is 0 chance it can make it into the deck.

With twin gone, do you guys think it's worth running Painful Truths in the sideboard still? I love the card advantage, and if BGx picks up a lot more I'll add it back in, but in a meta full of Affinity and Infect, I don't see it being sided in as often as I'd like. I think I should side it in against Eldrazi and Tron to make sure I don't run out of gas, and I might want it against Delver, probably against Elves, and possibly against Merfolk, but none of those are huge right now.

Another question: should I be siding Mana Leak? I really have no idea if it belongs or not.

I am going to try and include a 1-of Darkblast in the sideboard. Hitting most of Affinity, most of Infect, and Master of Waves, as well as its synergy with Faithless Looting, is way too tasty to pass up. Thanks a ton to PlattBonnay because I would not have found that card without you.

Are there any useful Grixis colored cards that prevent you from dying to damage? That seems like it would be the most helpful sideboard card right now. I know white has Worship but... Wrong color.

Darkness, sort of, which I actually have a copy of in my collection. How / when would I use such an effect?

Oh I meant cards that produce ongoing effects like that, which could help against the "get you dead" decks. One turn Fog effects wouldn't be useful.

Darkness is pretty good against Bogles, Affinity, and Infect. It stalls for 2 turns with Snap, which normally gives you time to win.

Don't spread yourself too thin. You don't need cards for every matchup. Just accept that you're going to lose to some decks.

Preventing the opponent from winning is more of a white effect than anything and not really what this deck wants to be doing.

I've put Rakdos Charm back in because the dedicated grave hate isn't necessary and there's no such thing as too much artifact hate.

Darkness doesn't belong in here. Not what this deck is trying to do.

Is there a better counterspell I should play instead of Mana Leak?

I will be removing either Electrolyze or Painful Truths for 1 Darkblast. Which is the better to remove? I can't decide.

So Tron had a low showing at the Pro Tour metagame, so I've dropped 1 Crumble to Dust to include both Painful Truths and Darkblast in my sideboard. Painful Truths is surprisingly good against Eldrazi, which had an unfortunately large PT metagame percentage, and a must-have against some of the other big decks such as Scapeshift and Control of any kind.

I will likely adjust a little more based on the final results, but this might be the configuration of choice for now.

Maybe replace Rakdos Charm with some more efficient artifact hate. Hurkyl's Recall, Vandalblast, Ancient Grudge with a Breeding Pool mainboard all come to mind

@uskie Rakdos Charm also fills in the role of graveyard hate and possibly can also hate on token decks or Kiki-Jiki, Mirror Breaker decks. It's here for it's versatility rather than it's artifact hate strength.

Lemmingllama is right. At the end of the day I don't really need that efficient of artifact hate, but rather I just need a critical mass and versatility. The curve in this deck is so low to the ground anyway that efficiency of cards like Rakdos Charm is just not an issue.

So with Eldrazi being popular, a lot of people are talking about Death and Taxes or Hatebears becoming popular. Both of these are super bad matchups for me because this deck kinda folds to that kind of hate. Mostly I find I just don't know how to approach the matchup, so any advice on what I should be trying to do would be greatly appreciated. Thanks!

It's fundamentally a creature matchup. Just kill their things.

Oh. That's it? Hatebears / D&T are both matchups where efficiency is super important, so Lightning Bolt should shine, but Terminate seems super inefficient against them and Inquisition of Kozilek doesn't build tempo, and tempo seems kind of important in that matchup too. Engineered Explosives and Pyroclasm are likely pretty good. Counterspells feel wrong in that matchup, but PLEASE tell me if I'm completely incorrect about that. Remand looks like it should be sided out. Is Darkblast good enough? I doubt it.

Those are my thoughts at the moment, with my main questions being: is Terminate too inefficient against them? Are counterspells as bad as they sound against them? Is the tempo loss of hand hate too much of a drawback or is removing their Leonin Arbiters (hate that card) worth it?

Thanks!

Remand is bad. Darkblast kills their mana creatures, Thalia, Mindcensors, Flickerwisps, etc. Lists vary a lot, so it's effectiveness also varies.

Discard is fine against them. Terminate is good because it trades with a creature. Their beatdown isn't very fast (usually), so you have time to set up.

I realized that after I posted that aha. I used to use Rakdos Charm as twin hate so I completely forgot about that ability. Also- have you considered running a third Snapcaster Mage? I'm saving up for a third one so I'm wondering how two works out for you.

Thanks. Guess I'll try that out. Voice of Resurgence takes a big steamy duke on my deck, so I know I can't make the matchup favored, but I also don't mind accepting it as a bad matchup since it isn't super popular yet.

uskie 2 Snaps is a budget thing. If budget weren't an issue, I'd have Lilis, 4 Snaps, Damnation.... (leaves the computer daydreaming about winning the lottery)

Oh man dude, what a nice deck. My only suggestion would be to drop the go for the throat for a Murderous Cut, but either way man, nice deck. +1!

Thanks! I run GFTT because affinity is favored anyway so I can handle 1 dead card and there are just enough pro-red problem cards that I like having a non-red removal spell. Additionally, I can avoid fetching as aggressively against aggro decks if I have this and pay BB or UB for it rather than having to have RB. Murderous Cut is not preferred because this deck can't delve quite effectively enough to support it. Also, I can't pay with delve if I try to Snapcaster Mage it, so that doesn't work either. It's some pretty subtle reasons to play GFTT rather than Cut, but I'm pretty sure that it's correct.

You run out of graveyard :P

I like Go for the Throat over Cut here, but only two of your four reasons hold water.