Hmmm. I am trying to get off the delvers. 2 Delver turning into 2 Relentless sounds pretty good, actually. I'll have to test. Thanks!

I think that this deck is really at a crossroads with what it's trying to do. I think that you should focus way more on either aggro or attrition. I really, really like the relentless dead plan. I think it would be awesome in this deck. However, like you have said, it would need a major overhaul to fit the card in. I think this is a card you really want to play four of so that you can let one die and know you can get it back later. I prefer the attrition-y route, so I would recommend the following: remove bloodghast, thoughtseize, and delver. Bloodghast seems a little too slow for me, even with kalitas. Delver just doesn't seem like the way this deck is headed. Thoughtseize wil be way worse with the eldrazi banning. I would replace these cards with the following: 4 relentless dead, 3 fleshbag marauder (relentless dead synergy), 4 thought scour. Fleshbag seems ridiculous with relentless dead, and though scour can help power out the aforementioned zombies as well as help your Tasigur and snapcaster. Awesome deck!

I agree that Delver is hot garbage in this deck. The random Remand is also bad.

EDIT: And Go for the Throat should be Doom Blade.

Bloodghast isn't going anywhere. The deck is more or less built around playing him + Faithless Looting. I don't really want to change that.

That said, Relentless Dead serves a very similar purpose as Bloodghast and is arguably better with the right support, so thus I'd rather just start a new deck to go the Relentless Dead all-in attrition route. You have convinced me that it's much better than I initially thought. To play Relentless Dead, it would, like Bloodghast, have to be a 4-of to gain maximum effectiveness. It's one of those cards that gets better with each copy you draw.

The biggest initial question is which colors to play. I don't think straight UB is a good idea because of lack of support. But, in a Relentless Dead deck, I don't see any good reason to stay in Grixis. Maybe Sultai would be better? Tarmogoyf helps the attrition plan and Abrupt Decay should be pretty good post-ban again. Tarmogoyf not being a Zombie is unfortunate though.

The synergy between Relentless Dead and Fleshbag Marauder reminds me a LOT of Sedraxis Specter in Bloody Singleminded - very cute, but ultimately not good enough to be competitive.

Yes, both Delver and Remand do not belong in here. Neither of them are actually that bad, but neither of them are optimal. Nighthawk is in the same category. I've known this for awhile, but budget has prevented me from acquiring more than 2 Snapcaster Mage or any Liliana of the Veil. Here's to hoping for reprints.

Perhaps Doom Blade and GFTT should be swapped. Both BGx and Affinity are good matchups so having a dead card game 1 in either isn't terrible, but when it comes to sideboarding, I have a lot more to board in vs Affinity than BGx, making me more inclined to stick to GFTT. Then again, maybe I don't even have to side out

I'd rather have a card that kills literally everything except Dark Confidant than one that kills literally everything except the second most played deck.

If you do decide to play with Relentless Dead, I'd recommend Sultai. Lotleth Troll can do a good amount of work if you do plan on doing some Gravecrawler/Bloodghast tech.

This is beginning to sound like Zombie tribal. Especially since I'm pretty sure a Relentless Dead deck would not want to play Kalitas, Traitor of Ghet.

Okay, so apparently that's a thing. Dang that looks like an interesting card. Saccing a bloodghast seems very good, but if I don't have him, saccing a land could be tough. Instant speed too makes it even better. I have to say I think it'd be better in a Relentless Dead deck than in my deck, but it definitely needs to be tested. This looks like it's going to be such a good set.

So, what YOU need is some anecdotal evidence. A lot of it. Personally I think Titi is better in a control shell than a tempo shell since it's inherently non-aggressive until you flip it, but that's just me and I haven't played with it yet.

So guys, I think I found a nice replacement for Delver of Secrets  ^Flip. This card looks super exciting to me. Especially in a deck that likes killing opponent's creatures in interactive matchups. I also don't mind my Bloodghast dying with this equipped.

Here's a link if the image breaks

I like it. I think that if you want to go that route, I'd play a few more fatties or more removal. I don't think it's great if you just drop it turn one and have to wait until turn 4 to do something.

Minor update. I'm now sideboarding 2 Anger of the Gods over 1 Pyroclasm and 1 Languish. I've found that Podless can be a tough matchup and it's pretty popular right now, and Anger just kills that deck. Having 2 Anger and 2 Kalitas to ruin their day makes me pretty hopeful that I can start winning that matchup.

I know Anger is sorta terrible with Bloodghast, but I side Ghast out in that matchup anyway (since he doesn't do anything) and other matchups where I'd board in Anger, Ghast isn't super relevant. Matchups where I board in Anger are Affinity, Zoo, Hatebears, Merfolk, Bogles, Podless, and Kiki-Chord, for relevant metagame. Of those, Ghast gets sided out against Podless and Kiki-Chord, and the benefits of Anger outweigh losing Ghast in all the rest except maybe Zoo, Hatebears, and Merfolk, and that's a maybe. Ghast is best in the grindy and control matchups, which are not Anger matchups. Besides, Ghast landfall is a 'you may' trigger, so I can plan ahead and not return him if I'm planning to Anger.

I've been rather broke of late (so i can't afford Bloodghast ), but besides that and not having Liliana of the Veil I've been running Stormchaser Mage as a substitute and it seems to be fairly good. I don't know how it is in comparison, but I figured I'd at least ask y'alls opinion about it or whether I should just pony up and get the damn Bloodghast already

Hmmm. Do you have a decklist for what you're playing right now?

I haven't gotten around to making the Relentless Dead + Thought Scour shell yet, but that might be a cheaper option, and potentially even better if the suspicions of others hold true.

http://tappedout.net/mtg-decks/rocket-science-my-version/

SHould be really similar to yours as it currently stands

Glad you asked! I've been slow-rolling a long comment about sideboarding for Rocket Science Competitive for about a week and a half now, so I'll finish that up soon. I'd love to discuss sideboard some more. I have my math final tomorrow night and will be cramming until that's over, but that's my last test and then I'm all free.

Does Vampire Nighthawk make a difference in your burn matchups? I feel like he is a bit of a lightning rod.. Though I love the Bloodghast combo in Grixis and am currently testing it myself. I'm testing out a deck that takes a more aggro-burn matchup to this shell while maintaining a good amount of the disruption that delver brings. It utilizes Goblin Guide into t2 Faithless Looting. Check it out here: Grixis Deck Wins: Bloodthirst 2.0

Just so you know, your deck is slightly illegal...it has 78 total cards (63 main and 15 side)

Thanks. Liliana of the Veil is not supposed to be in here. Good catch. She belongs in the list, and is in the optimized version Rocket Science (Competitive), however my budget doesn't allow for her and this version is the deck I own in paper. She must have accidentally gotten added in when I was adding alters the other day, since I was copying alters back and forth between the decks.

Having 78 cards isn't illegal .... but it is a bad idea.

EDIT: I've been playtesting your deck against mine for a bit, and it's some fun games. Your deck has the upper hand because of its explosiveness combined with interaction, but my deck can get there on tempo with Bloodghast if it can keep your Titi's at bay.

I really love this deck (so much in fact that I forgot that I've +1'd it already, lol)

Just so you know though, you forgot to take "Delver" out of the tags. A little thing, but something that should be fixed.

Oh yeah, no delvers anymore. I really need to update the primer on this deck too (basically needs a partial re-write, especially on sideboard and sideboarding).

My background image keeps breaking too. If anyone knows a solution, please share.

But where's the fun in that? Nah, I want to keep the background, but I might need to actually set up my own style sheet to do so. Project for this weekend.

I think the dude with that deck on untap is me, although it's a pretty old version. I've been playing Rocket Science Competitive on there for months, although in the past few weeks I've only been playing Sugar-free Oreos on untap.

As for his version, it makes some interesting trade offs. It's much more tempo-oriented than this deck. Delver makes the deck inherently more aggressive, and less oriented on value from Ghast like this deck. Faithless Looting, in this card, is in many ways a value card when topdecking. It makes it easier to set up Bloodghast if we draw both, but my deck won't be getting the opponent down to 10 life quickly; from the sound of it the deck you played against can get the opponent under 10 to hardcast hasty Bloodghast with ease. With Thought Scour, it has a lower drawback if you don't hit Bloodghast since it's card parity. It also has a higher value if you do hit Bloodghast since you get Ghast and a card. However, it's much more inconsistent since if you have to get lucky and mill it off the top. It's not built around Bloodghast as much as this deck.

I have to say I like this version better because it matches my play style much more. I don't know which is better, but would love to play against that user sometime.

if u ever need help beating tron i suppose i can help. the main problem is that midrange has an awful matchup against tron. if you want to beat it, crumble is most likely too slow, as you would play it after they already have tron. I know you love your landbase but if you could find room for some mainboard ghost quarters, that destroys tron game 1. Now they only run 1 basic land, so the second is a strip mine, and the first if they draw the basic. also, loam or crucible isnt in the deck for game 1, so they have no way to get it back. this puts them back to a t4 tron or later. also, adding more dreadbores can help because it kills karn and ugin. just some thoughts, love the deck man

just thought of a few more things. have you thought about jace vryn prodigy. He can let u discard bloodghast while gaining a card, and he flips super easily. Whenever he flips he removes some of your opponents attack and can be used a sorcery speed snapcaster. other than price is there a reason ancestral vision is not in here. I find that it really helps any deck i put it in, because if ive used up my removal by t4, i get more for just paying 1 mana turn 1. it also has insane value in combination with dark dwellers. dark dwellers can also flash back removal and other draw, on top of the fact that it is a 4/4 body. olivia voldaren was my next thought. first of all, she can make things vampires and take control of them as long as she lives. do you know a card that can sacrifice vampires so that your opponents cant get them back? thats right, kalitas. in addition, she buffs herself the entire time while she takes out swarms of fliers. she can block souls, and deal massive amounts of damage to finish out the game very quickly. with remand, command, and rise and fall, she can come back and finish them off even after they remove her. Also, in response to it being bolted, if you have kalitas late game, you can always hit kalitas for 1, or sacrifice olivia to buff kalitas. Bitterblossom was another thought. i know it doesnt usually go in decks like this, but i have found it good in midrange. it makes you lose life, but gives you tons of chump blockers to block wurmcoil engines and souls. also, after a while, they become attackers and attack in swarms for a lot of damage. between all you lifelink, 1 life per turn shouldnt be a problem. My mind also flew to planeswalkers. myself, i dislike liliana of the veil. But chandra the pyromancer gives card advantage, removal of small creatures, and an ultimate that can at worse deal 9 damage to an opponent. keranos seems like a good card at least in the sideboard. against slow games against midrange, it grinds out very late and lets you draw far more and hits your opponent and their creatures for a lot of damage. also depending on how many mountains your running koth would seem good