Ok everyone! I've cleared comments and would like to invite all of you to join in a small poll here for the deck. The question is pretty simple and I'd love it for everyone to participate, it would really help, thanks.

Is it worth dropping ANOTHER roughly $40 on the deck to run a Cavern of Souls?

Well, control isn't very popular right now. So it depends on your meta, but I think you could do without it. Don't get me wrong, it's an awesome card... But even if you did run it, countering zombies kind of feels bad since it isn't terribly difficult to get them back. That's my 2 cents.

control is dead in modern (at least last time i checked), so only if you generally are playing against control, your worries would mostly be death's shadow and tron... on a side note, do you have enough lands in your deck?

I wouldn't say control is dead. Just mostly dead :P

If it's not dead dead, this deck's mission is to kill it. Gosh it's like you didn't even read the primer ;)

I vote no. Just doesn't seem worth it.

I definitely do not agree that control is dead in Modern. Even if control was dead in Modern, that doesn't mean counter spells aren't found in other decks. While they are most commonly found in control decks, plenty of tempo decks and combo decks run various counter spells. Mana fixing is an attractive feature of Cavern of Souls that other tribal decks that are multicolor like and usually need. Since your deck is mono-black instead of the Blue-Black variant, mana fixing isn't something that you need to worry about. However, if you have the $40 to spend and doing so won't set you behind on rent or some necessity like that, I see no legitimate argument against putting it into the deck.

All very interesting and valid points. So far the vote stands 3:1 in favor of "no".

Bringing up another point; Counter this Does help against Chalice of the Void which sees a decent amount of play I think. Does this change things? Running a single copy could be worth in that case.

I have 3 to sell if u want 'em

I personally feel that it's worth it if you're running a deck with only one creature type aka zombie. At that point, it doesn't really matter if control is dead or not, it's still useful and it's there if you do happen to play against a control deck. It all comes down to if you have the money to spare and also the card you're going to replace. Other than that, I see no problem with it.

Ok, Ok... this is getting pretty interesting now. I'd like to go ahead and thank everyone again for their input. As it now stands, the votes are all tied up 3:3 with the overall consensus that it's not needed but wouldn't hurt having

Going to let this poll go for a little bit longer and then see where we stand on the card. Either way this has been a really neat experience and honestly I'd say worked out quite well.

Get it. Cavern of Souls prevents your zombies from getting countered, and even if there is a low chance of running into a control deck, it is better to be prepared to face it instead of being unprepared. It can only help your deck in the end and you're trying to make it stronger so go for it. Maybe even a playset. It's like playing 8-Rack; low chance of seeing Leyline of Sanctity, but you need to have at least a Ratchet Bomb or else the game will be a lot more difficult.

@FAGGOTUS-REX I could see running him as a one of maybe. Probably a side board card though, I'm just not sure he does nearly enough to be worth it here.

Thanks to all those who commented, a decision has been made. It looks like we're going to go for it, and hopefully the deck will become better because of it.

I know it's not much, but as a thanks to all who commented, I feel deck upvotes are in order. If there is any one is particular you want comment it on my profile, otherwise it's just going to be the top deck. Cheers everyone!

@Homura_Akemi saturn999 Despionnage ZackBinks APPLE01DOJ TheDuggernaught emrakulinsmugglers

Tokens-Clearly the Best Deck in Modern (Guide)

Glad I could help!

no problem, let me know how adding it goes! sELFish Nissa

Cavern of Souls can help get fight through Chalice of the Voids. If there's anything that's doing any countering in the meta right now, it's Chalice. My spirits deck lost a game to Bant Eldrazi because of Chalice. Sad day. :(

@Happymaster19 played a match with this deck and they got 2 out on me, one for one mana, one for three. i lost. badly.

Since you're adding a Cavern of Souls then you should consider dropping a Nykthos, Shrine to Nyx. In a deck with 22 lands, I wouldn't run more than 3 colorless lands. Sure Nykthos, Shrine to Nyx can be good on occasion but it's the weakest of your utility lands. Mutavault has synergy with Gravecrawler and your lords, Cavern of Souls still provides colored mana but Nykthos, Shrine to Nyx can't do anything without an already established board state.

I would also immediately go up to 4 Fatal Push. It's just too good of a card not to be running 4. I would drop 1x Diregraf Colossus and 1x Cryptbreaker for it. Diregraf Colossus is good but because of the point it comes into play you really only need 3. Cryptbreaker in my experience is less than stellar and would be an easy cut.

I may be missing something (am I?) but I see no value in running Nameless Inversion. It could be good vs Merfolk I guess but due to the anti synergy you can't use it to pump your own creatures which leaves a less than desirable Ulcerate. I would replace it with a 1-2 Bile Blight or a Go for the Throat.

In order to make this as competitive as possible you really need to ditch the deck extensions on the SB.

Army of the Damned may fit the Zombie theme nice but I can't think of a single match that siding in an 8 mana card is going to help you out?

Mikaeus, the Unhallowed may be good vs Alley's or White Weenies but both of those decks are Aggro decks and will close the game out way before a 22 land deck reaches 6 mana.

Endless Ranks of the Dead this is the definition of a win more card. It's useless when you're loosing and if it's good you're already winning. The 1 MB copy is fine for flavor but siding it in isn't going turn the tides of any match up.

Sidisi, Undead Vizier Tutors can be good but this is just too slow and comes with a significant down side. You've already decided it's not good enough for the MB and it's just wasting space on the SB.

Cutting those cards will free up 5 slots. I would suggest Thoughtseize #3, 2x Lifebane Zombie and 2x Phyrexian Crusader. If you don't like any of those suggestions Demon's Horn is also good.

@APPLE01DOJ Drop Nykthos, Shrine to Nyx and just run another swamp instead? I'm definitely all for making the deck better, so I'll try running it this way for a little, and see if it needs to be cut, but I see your point.

I also get that push is good, especially right now, so I'll go back to running x4 for now.

Nameless Inversion is my (arguably) lesser Grasp of Darkness. I like it here because it's recyclable with Lord of the Undead and triggers Diregraf Colossus to net me tokens.

As for SB changes, I'm gonna cry cutting Mikaeus, the Unhallowed because of personal ties to the card, but i do agree that its just too slow. the rest is solid. the reason they're not already gone is because of the card's ties to when this deck first started out as something casual. I suppose we'll see how this all goes, thankfully I already own extra copies of all the cards i need haha

I think you should drop one or two Liliana of the Veils for that many Liliana the Last Hope considering you have Graf Harvest in your deck already. Also I think that Dark Salvation could have a place in the deck. Lastly I don't see the big fuss over Cryptbreaker, I would take them all out for more Caverns of Souls.

nishanrox111 i am currently considering dropping one LOTV for a Last Hope. Cryptbreaker is my access to draw. i wouldnt want to drop him. he has come in use if i happen to just need to find a play for the turn, or digging through the library faster

not sure how i feel about Dark Salvation

Cryptbreaker is insane. Dark Salvation is more variant that Dismember but you can learn to play well with it. You don't always have to dump everything into it. You can just pay a mana, count your zombies, and point at a dude. I think a card that more modern decks should experiment with is Smuggler's Copter. While some creature choices might look fun or interested, I think the creature base could be simplified and made to have room for Copter. It's a flying beater that fixes your draws and you also tend not to care about discarding. It might not have the flavor but it definitely has the function.

I also wouldn't argue with swamping in a second Urborg, Tomb of Yawgmoth over a swamp. It can help smooth clunky colorless land hands.

To be honest Urborg, Tomb of Yawgmoth isn't a card that needs more than one copy in a deck. It really is only fixing four lands, so I think one is enough.