Since the release of Innistrad: Midnight Hunt and Innistrad: Crimson Vow, zombies have seen a tremendous push in Magic, given the emphasis on the tribe within the gothic horror plane. Although zombies are far from meeting the higher tiers of Modern play, tribal archetypes are often enjoyable in a local FNM environment. With that, you can build an affordable and semi-competitive Zombie deck, with the option to optimize it down the line.

To get started, staying in one color allows you to protect your purchase to see if the strategy is right for you. If you end up enjoying making a bunch of zombies and overwhelming your opponent, you can always upgrade by adding a second color later! 

Budget Modern Mono-Black Zombies

Magic: The Gathering TCG Deck - Budget Mono-Black Zombies by Emma_Partlow

'Budget Mono-Black Zombies' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emma_Partlow

Event:

Rank:

Modern

Market Price: $70.17

Cards

Cryptbreaker

Color Identity:B

Market Price: $6.24

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/120259_200w.jpg

{1}{B}, {T}, Discard a card: Create a 2/2 black Zombie creature token.
Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Buy This Card! https://www.tcgplayer.com/product/120259/magic-eldritch-moon-cryptbreaker

Nihil Spellbomb

Color Identity:B

Market Price: $0.49

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/161909_200w.jpg

{T}, Sacrifice Nihil Spellbomb: Exile target player's graveyard.
When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Buy This Card! https://www.tcgplayer.com/product/161909/magic-masters-25-nihil-spellbomb

Swamp

Color Identity:B

Market Price: $0.01

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/59661_200w.jpg

({T}: Add {B}.)

Buy This Card! https://www.tcgplayer.com/product/59661/magic-planechase-2012-swamp-143

Graveyard Marshal

Color Identity:B

Market Price: $0.24

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/169233_200w.jpg

{2}{B}, Exile a creature card from your graveyard: Create a tapped 2/2 black Zombie creature token.

Buy This Card! https://www.tcgplayer.com/product/169233/magic-core-set-2019-graveyard-marshal

Legion's End

Color Identity:B

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192565_200w.jpg

Exile target creature an opponent controls with mana value 2 or less and all other creatures that player controls with the same name as that creature. Then that player reveals their hand and exiles all cards with that name from their hand and graveyard.

Buy This Card! https://www.tcgplayer.com/product/192565/magic-core-set-2020-legions-end

Dark Salvation

Color Identity:B

Market Price: $0.20

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248788_200w.jpg

Target player creates X 2/2 black Zombie creature tokens, then up to one target creature gets -1/-1 until end of turn for each Zombie that player controls.

Buy This Card! https://www.tcgplayer.com/product/248788/magic-commander-innistrad-midnight-hunt-dark-salvation

Champion of the Perished

Color Identity:B

Market Price: $2.75

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/246013_200w.jpg

Whenever another Zombie enters the battlefield under your control, put a +1/+1 counter on Champion of the Perished.

Buy This Card! https://www.tcgplayer.com/product/246013/magic-innistrad-midnight-hunt-champion-of-the-perished

Feed the Swarm

Color Identity:B

Market Price: $0.43

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/254250_200w.jpg

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Buy This Card! https://www.tcgplayer.com/product/254250/magic-commander-innistrad-crimson-vow-feed-the-swarm

Carrion Feeder

Color Identity:B

Market Price: $1.17

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/191578_200w.jpg

Carrion Feeder can't block.
Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Buy This Card! https://www.tcgplayer.com/product/191578/magic-modern-horizons-carrion-feeder

Witch's Cottage

Color Identity:B

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/198390_200w.jpg

({T}: Add {B}.)
Witch's Cottage enters the battlefield tapped unless you control three or more other Swamps.
When Witch's Cottage enters the battlefield untapped, you may put target creature card from your graveyard on top of your library.

Buy This Card! https://www.tcgplayer.com/product/198390/magic-throne-of-eldraine-witchs-cottage

Force of Despair

Color Identity:B

Market Price: $1.87

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/190880_200w.jpg

If it's not your turn, you may exile a black card from your hand rather than pay this spell's mana cost.
Destroy all creatures that entered the battlefield this turn.

Buy This Card! https://www.tcgplayer.com/product/190880/magic-modern-horizons-force-of-despair

Undead Augur

Color Identity:B

Market Price: $0.25

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248774_200w.jpg

Whenever Undead Augur or another Zombie you control dies, you draw a card and you lose 1 life.

Buy This Card! https://www.tcgplayer.com/product/248774/magic-commander-innistrad-midnight-hunt-undead-augur

Death Baron

Color Identity:B

Market Price: $1.71

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248745_200w.jpg

Skeletons you control and other Zombies you control get +1/+1 and have deathtouch.

Buy This Card! https://www.tcgplayer.com/product/248745/magic-commander-innistrad-midnight-hunt-death-baron

Duress

Color Identity:B

Market Price: $0.04

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248314_200w.jpg

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Buy This Card! https://www.tcgplayer.com/product/248314/magic-innistrad-midnight-hunt-duress

Village Rites

Color Identity:B

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/230172_200w.jpg

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Buy This Card! https://www.tcgplayer.com/product/230172/magic-kaldheim-village-rites

Cemetery Reaper

Color Identity:B

Market Price: $0.99

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248744_200w.jpg

Other Zombie creatures you control get +1/+1.
{2}{B}, {T}: Exile target creature card from a graveyard. Create a 2/2 black Zombie creature token.

Buy This Card! https://www.tcgplayer.com/product/248744/magic-commander-innistrad-midnight-hunt-cemetery-reaper

Fatal Push

Color Identity:B

Market Price: $1.95

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218830_200w.jpg

Destroy target creature if it has mana value 2 or less.
Revolt — Destroy that creature if it has mana value 4 or less instead if a permanent you controlled left the battlefield this turn.

Buy This Card! https://www.tcgplayer.com/product/218830/magic-double-masters-fatal-push

Spark Harvest

Color Identity:B

Market Price: $0.02

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/226980_200w.jpg

As an additional cost to cast this spell, sacrifice a creature or pay {3}{B}.
Destroy target creature or planeswalker.

Buy This Card! https://www.tcgplayer.com/product/226980/magic-commander-legends-spark-harvest

Lord of the Accursed

Color Identity:B

Market Price: $0.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248771_200w.jpg

Other Zombies you control get +1/+1.
{1}{B}, {T}: All Zombies gain menace until end of turn.

Buy This Card! https://www.tcgplayer.com/product/248771/magic-commander-innistrad-midnight-hunt-lord-of-the-accursed

Bontu's Last Reckoning

Color Identity:B

Market Price: $1.38

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/132232_200w.jpg

Destroy all creatures. Lands you control don't untap during your next untap step.

Buy This Card! https://www.tcgplayer.com/product/132232/magic-hour-of-devastation-bontus-last-reckoning

Your goal with Mono-Black Zombies is to curve out with threats, with your three mana value creatures offering "lord" effects such as Death Baron and Lord of the Accursed to stack up damage. As you're in black, you have a sacrifice sub-theme that allows you to generate value whenever your opponent attempts to interact with your zombies. Using Village Rites or Carrion Feeder defensively means you can still grow your creatures or draw cards to further your game plan. 

You also have ways to sink mana if you happen to flood out. Graveyard Marshal and Cryptbreaker enable you to create zombie tokens to extend your board, which also lines up well with Champion of the Perished. Incidentally, Champion of the Perished can grow if you create zombie tokens, so there is a decent chance the card can take over a game. In terms of interaction, Fatal Push leans into the sacrifice theme — revolt is fairly easy to achieve — and Dark Salvation gives you zombies in addition to removing a tricky threat.

By being mono-colored, the mana base is extremely affordable, with a couple of Witch's Cottages to encourage the long game. You can add a few utility cards such as Field of Ruin or Ghost Quarter if you want to deal with any troublesome lands, but be mindful that most of your zombies are heavy on the black mana, which can compromise casting these cards on curve. The important thing here is to maintain aggression, and diluting your mana base early on can harm your game plan. 

Semi-Optimal Modern Mono-Black Zombies 

Magic: The Gathering TCG Deck - Semi-Optimal Mono-Black Zombies by Emma_Partlow

'Semi-Optimal Mono-Black Zombies' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emma_Partlow

Event:

Rank:

Modern

Market Price: $205.54

Cards

Geralf's Messenger

Color Identity:B

Market Price: $11.16

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/57683_200w.jpg

Geralf's Messenger enters the battlefield tapped.
When Geralf's Messenger enters the battlefield, target opponent loses 2 life.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Buy This Card! https://www.tcgplayer.com/product/57683/magic-dark-ascension-geralfs-messenger

Death Baron

Color Identity:B

Market Price: $1.71

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248745_200w.jpg

Skeletons you control and other Zombies you control get +1/+1 and have deathtouch.

Buy This Card! https://www.tcgplayer.com/product/248745/magic-commander-innistrad-midnight-hunt-death-baron

Nihil Spellbomb

Color Identity:B

Market Price: $0.49

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/161909_200w.jpg

{T}, Sacrifice Nihil Spellbomb: Exile target player's graveyard.
When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Buy This Card! https://www.tcgplayer.com/product/161909/magic-masters-25-nihil-spellbomb

Swamp

Color Identity:B

Market Price: $0.01

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/59661_200w.jpg

({T}: Add {B}.)

Buy This Card! https://www.tcgplayer.com/product/59661/magic-planechase-2012-swamp-143

Gravecrawler

Color Identity:B

Market Price: $15.12

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/113263_200w.jpg

Gravecrawler can't block.
You may cast Gravecrawler from your graveyard as long as you control a Zombie.

Buy This Card! https://www.tcgplayer.com/product/113263/magic-duel-decks-blessed-vs-cursed-gravecrawler

Legion's End

Color Identity:B

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192565_200w.jpg

Exile target creature an opponent controls with mana value 2 or less and all other creatures that player controls with the same name as that creature. Then that player reveals their hand and exiles all cards with that name from their hand and graveyard.

Buy This Card! https://www.tcgplayer.com/product/192565/magic-core-set-2020-legions-end

Fatal Push

Color Identity:B

Market Price: $1.95

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218830_200w.jpg

Destroy target creature if it has mana value 2 or less.
Revolt — Destroy that creature if it has mana value 4 or less instead if a permanent you controlled left the battlefield this turn.

Buy This Card! https://www.tcgplayer.com/product/218830/magic-double-masters-fatal-push

Spark Harvest

Color Identity:B

Market Price: $0.02

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/226980_200w.jpg

As an additional cost to cast this spell, sacrifice a creature or pay {3}{B}.
Destroy target creature or planeswalker.

Buy This Card! https://www.tcgplayer.com/product/226980/magic-commander-legends-spark-harvest

Lord of the Accursed

Color Identity:B

Market Price: $0.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248771_200w.jpg

Other Zombies you control get +1/+1.
{1}{B}, {T}: All Zombies gain menace until end of turn.

Buy This Card! https://www.tcgplayer.com/product/248771/magic-commander-innistrad-midnight-hunt-lord-of-the-accursed

Inquisition of Kozilek

Color Identity:B

Market Price: $2.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/128476_200w.jpg

Target player reveals their hand. You choose a nonland card from it with mana value 3 or less. That player discards that card.

Buy This Card! https://www.tcgplayer.com/product/128476/magic-modern-masters-2017-inquisition-of-kozilek

Champion of the Perished

Color Identity:B

Market Price: $2.75

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/246013_200w.jpg

Whenever another Zombie enters the battlefield under your control, put a +1/+1 counter on Champion of the Perished.

Buy This Card! https://www.tcgplayer.com/product/246013/magic-innistrad-midnight-hunt-champion-of-the-perished

Witch's Cottage

Color Identity:B

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/198390_200w.jpg

({T}: Add {B}.)
Witch's Cottage enters the battlefield tapped unless you control three or more other Swamps.
When Witch's Cottage enters the battlefield untapped, you may put target creature card from your graveyard on top of your library.

Buy This Card! https://www.tcgplayer.com/product/198390/magic-throne-of-eldraine-witchs-cottage

Force of Despair

Color Identity:B

Market Price: $1.87

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/190880_200w.jpg

If it's not your turn, you may exile a black card from your hand rather than pay this spell's mana cost.
Destroy all creatures that entered the battlefield this turn.

Buy This Card! https://www.tcgplayer.com/product/190880/magic-modern-horizons-force-of-despair

Cryptbreaker

Color Identity:B

Market Price: $6.24

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/120259_200w.jpg

{1}{B}, {T}, Discard a card: Create a 2/2 black Zombie creature token.
Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Buy This Card! https://www.tcgplayer.com/product/120259/magic-eldritch-moon-cryptbreaker

Agadeem's Awakening

Color Identity:B

Market Price: $13.58

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222163_200w.jpg

Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less.

Buy This Card! https://shop.tcgplayer.com/magic/zendikar-rising/agadeems-awakening

Feed the Swarm

Color Identity:B

Market Price: $0.43

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/254250_200w.jpg

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Buy This Card! https://www.tcgplayer.com/product/254250/magic-commander-innistrad-crimson-vow-feed-the-swarm

Carrion Feeder

Color Identity:B

Market Price: $1.17

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/191578_200w.jpg

Carrion Feeder can't block.
Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Buy This Card! https://www.tcgplayer.com/product/191578/magic-modern-horizons-carrion-feeder

Undead Augur

Color Identity:B

Market Price: $0.25

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248774_200w.jpg

Whenever Undead Augur or another Zombie you control dies, you draw a card and you lose 1 life.

Buy This Card! https://www.tcgplayer.com/product/248774/magic-commander-innistrad-midnight-hunt-undead-augur

Bontu's Last Reckoning

Color Identity:B

Market Price: $1.38

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/132232_200w.jpg

Destroy all creatures. Lands you control don't untap during your next untap step.

Buy This Card! https://www.tcgplayer.com/product/132232/magic-hour-of-devastation-bontus-last-reckoning

Village Rites

Color Identity:B

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/230172_200w.jpg

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Buy This Card! https://www.tcgplayer.com/product/230172/magic-kaldheim-village-rites

With that, there are plenty of ways to power up Mono-Black Zombies with the following upgrades. I recommend going in order of the list below.

Mainboard

Sideboard

With the budget list, there aren't many ways to bring back your zombies from the graveyard to complete the sacrifice theme. By adding cards such as Agadeem's Awakening, Geralt's Messenger, and Gravecrawler, we have various ways to capitalize on returning those creatures into play. Inquisition of Kozilek comes in over Duress, as it allows you to remove any early interaction from your opponent. This means you can sculpt your game plan in the later turns.

The additions of Gravecrawler and Geralf's Messenger are primarily intended to re-enter the battlefield regularly — making them excellent sacrifice fodder. Plus, with both of these being zombies, Champion of the Perished can grow even further before stacking with Undead Augur's triggers, and so forth. Due to the prevalence of Dredge and Yawgmoth archetypes in Modern, both Gravecrawler and Geralt's Messenger lean on the expensive side, because they generate excellent value. However, both of these cards are decent investments for Modern if you want to veer into either strategy. They offer a similar game plan of recurring creatures from the graveyard, with Yawgmoth being more convoluted than Dredge. Neither of these are likely to see a reprint anytime soon, so unfortunately, the price may increase over time. 

Optimized Modern Mono Black Zombies

Magic: The Gathering TCG Deck - Optimized Mono-Black Zombies by Emma_Partlow

'Optimized Mono-Black Zombies' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emma_Partlow

Event:

Rank:

Modern

Market Price: $345.67

Cards

Champion of the Perished

Color Identity:B

Market Price: $2.75

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/246013_200w.jpg

Whenever another Zombie enters the battlefield under your control, put a +1/+1 counter on Champion of the Perished.

Buy This Card! https://www.tcgplayer.com/product/246013/magic-innistrad-midnight-hunt-champion-of-the-perished

Inquisition of Kozilek

Color Identity:B

Market Price: $2.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/128476_200w.jpg

Target player reveals their hand. You choose a nonland card from it with mana value 3 or less. That player discards that card.

Buy This Card! https://www.tcgplayer.com/product/128476/magic-modern-masters-2017-inquisition-of-kozilek

Leyline of the Void

Color Identity:B

Market Price: $6.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192544_200w.jpg

If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent's graveyard from anywhere, exile it instead.

Buy This Card! https://www.tcgplayer.com/product/192544/magic-core-set-2020-leyline-of-the-void

Feed the Swarm

Color Identity:B

Market Price: $0.43

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/254250_200w.jpg

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Buy This Card! https://www.tcgplayer.com/product/254250/magic-commander-innistrad-crimson-vow-feed-the-swarm

Agadeem's Awakening

Color Identity:B

Market Price: $13.58

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222163_200w.jpg

Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less.

Buy This Card! https://shop.tcgplayer.com/magic/zendikar-rising/agadeems-awakening

Fatal Push

Color Identity:B

Market Price: $1.95

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218830_200w.jpg

Destroy target creature if it has mana value 2 or less.
Revolt — Destroy that creature if it has mana value 4 or less instead if a permanent you controlled left the battlefield this turn.

Buy This Card! https://www.tcgplayer.com/product/218830/magic-double-masters-fatal-push

Witch's Cottage

Color Identity:B

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/198390_200w.jpg

({T}: Add {B}.)
Witch's Cottage enters the battlefield tapped unless you control three or more other Swamps.
When Witch's Cottage enters the battlefield untapped, you may put target creature card from your graveyard on top of your library.

Buy This Card! https://www.tcgplayer.com/product/198390/magic-throne-of-eldraine-witchs-cottage

Force of Despair

Color Identity:B

Market Price: $1.87

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/190880_200w.jpg

If it's not your turn, you may exile a black card from your hand rather than pay this spell's mana cost.
Destroy all creatures that entered the battlefield this turn.

Buy This Card! https://www.tcgplayer.com/product/190880/magic-modern-horizons-force-of-despair

Bontu's Last Reckoning

Color Identity:B

Market Price: $1.38

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/132232_200w.jpg

Destroy all creatures. Lands you control don't untap during your next untap step.

Buy This Card! https://www.tcgplayer.com/product/132232/magic-hour-of-devastation-bontus-last-reckoning

Undead Augur

Color Identity:B

Market Price: $0.25

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248774_200w.jpg

Whenever Undead Augur or another Zombie you control dies, you draw a card and you lose 1 life.

Buy This Card! https://www.tcgplayer.com/product/248774/magic-commander-innistrad-midnight-hunt-undead-augur

Cryptbreaker

Color Identity:B

Market Price: $6.24

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/120259_200w.jpg

{1}{B}, {T}, Discard a card: Create a 2/2 black Zombie creature token.
Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Buy This Card! https://www.tcgplayer.com/product/120259/magic-eldritch-moon-cryptbreaker

Gravecrawler

Color Identity:B

Market Price: $15.12

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/113263_200w.jpg

Gravecrawler can't block.
You may cast Gravecrawler from your graveyard as long as you control a Zombie.

Buy This Card! https://www.tcgplayer.com/product/113263/magic-duel-decks-blessed-vs-cursed-gravecrawler

Headless Rider

Color Identity:B

Market Price: $1.91

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/253458_200w.jpg

Whenever Headless Rider or another nontoken Zombie you control dies, create a 2/2 black Zombie creature token.

Buy This Card! https://www.tcgplayer.com/product/253458/magic-innistrad-crimson-vow-headless-rider

Geralf's Messenger

Color Identity:B

Market Price: $11.16

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/57683_200w.jpg

Geralf's Messenger enters the battlefield tapped.
When Geralf's Messenger enters the battlefield, target opponent loses 2 life.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Buy This Card! https://www.tcgplayer.com/product/57683/magic-dark-ascension-geralfs-messenger

Carrion Feeder

Color Identity:B

Market Price: $1.17

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/191578_200w.jpg

Carrion Feeder can't block.
Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Buy This Card! https://www.tcgplayer.com/product/191578/magic-modern-horizons-carrion-feeder

Spark Harvest

Color Identity:B

Market Price: $0.02

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/226980_200w.jpg

As an additional cost to cast this spell, sacrifice a creature or pay {3}{B}.
Destroy target creature or planeswalker.

Buy This Card! https://www.tcgplayer.com/product/226980/magic-commander-legends-spark-harvest

Lord of the Accursed

Color Identity:B

Market Price: $0.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248771_200w.jpg

Other Zombies you control get +1/+1.
{1}{B}, {T}: All Zombies gain menace until end of turn.

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Aether Vial

Market Price: $31.25

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/145333_200w.jpg

At the beginning of your upkeep, you may put a charge counter on Aether Vial.
{T}: You may put a creature card with mana value equal to the number of charge counters on Aether Vial from your hand onto the battlefield.

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Legion's End

Color Identity:B

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192565_200w.jpg

Exile target creature an opponent controls with mana value 2 or less and all other creatures that player controls with the same name as that creature. Then that player reveals their hand and exiles all cards with that name from their hand and graveyard.

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Swamp

Color Identity:B

Market Price: $0.01

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/59661_200w.jpg

({T}: Add {B}.)

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In terms of optimizing the build, adding a set of Aether Vial and a couple of Headless Riders will give you the ability to be reactive with your spells. 

Mainboard

Sideboard

The addition of Aether Vial allows you to grow your board efficiently without tying up all of your mana. If you want to double up on removal with creatures, Murderous Rider is an excellent option to marry interaction while keeping the consistency of zombies high. The key addition is from Innistrad: Crimson Vow: Headless Rider is a fantastic option to leverage your battlefield by making zombie tokens through recursion, especially with the addition of Aether Vial. Yu can use Headless Rider at instant speed to create zombies if the opponent is wanting to remove your creatures. 

Adding Leyline of the Void provides an effective option for removing the opponent's graveyard without it interfering with yours. Nihil Spellbomb remains a decent answer, but the card draw isn't as essential since you have Cryptbreaker and Undead Augur to keep your hand full of cards. 

If you aren't keen on the idea of Aether Vial but want to really lean into the "sacrifice matters" game plan, then you can add red to incorporate Goblin Bombardment from Modern Horizons 2. 

Perhaps one of the most underplayed cards from the set, Goblin Bombardment is an excellent and well-costed sacrifice outlet. Since the card is an enchantment, it's difficult to remove without the opponent sideboarding in an answer after game one. Plus, it means you can use Gravecrawler as a consistent means to remove the kind of low toughness creatures which are dominant in Modern at present! (Think Dragon's Rage Channeler and Ragavan, Nimble Pilferer.)

Semi-Optimal Modern Rakdos Black Zombies 

Adding a second color does make the strategy costly, but the upside is so much higher, given you are splashing the best color in Modern at present. Evolving this from the semi-optimal Mono-Black Zombie build, here is what you'll need to add to make Goblin Bombardment work within the strategy.  

Magic: The Gathering TCG Deck - Semi-Optimized Rakdos Zombies by Emma_Partlow

'Semi-Optimized Rakdos Zombies' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emma_Partlow

Event:

Rank:

Modern

Market Price: $385.60

Cards

Dreadhorde Butcher

Color Identity:B,R

Market Price: $0.84

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/187230_200w.jpg

Haste
Whenever Dreadhorde Butcher deals combat damage to a player or planeswalker, put a +1/+1 counter on Dreadhorde Butcher.
When Dreadhorde Butcher dies, it deals damage equal to its power to any target.

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Agadeem's Awakening

Color Identity:B

Market Price: $13.58

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222163_200w.jpg

Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less.

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Champion of the Perished

Color Identity:B

Market Price: $2.75

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/246013_200w.jpg

Whenever another Zombie enters the battlefield under your control, put a +1/+1 counter on Champion of the Perished.

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Haunted Ridge

Color Identity:B,R

Market Price: $6.63

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/247828_200w.jpg

Haunted Ridge enters the battlefield tapped unless you control two or more other lands.
{T}: Add {B} or {R}.

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Legion's End

Color Identity:B

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192565_200w.jpg

Exile target creature an opponent controls with mana value 2 or less and all other creatures that player controls with the same name as that creature. Then that player reveals their hand and exiles all cards with that name from their hand and graveyard.

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Geralf's Messenger

Color Identity:B

Market Price: $11.16

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/57683_200w.jpg

Geralf's Messenger enters the battlefield tapped.
When Geralf's Messenger enters the battlefield, target opponent loses 2 life.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

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Carrion Feeder

Color Identity:B

Market Price: $1.17

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/191578_200w.jpg

Carrion Feeder can't block.
Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

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Bontu's Last Reckoning

Color Identity:B

Market Price: $1.38

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/132232_200w.jpg

Destroy all creatures. Lands you control don't untap during your next untap step.

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Leyline of the Void

Color Identity:B

Market Price: $6.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192544_200w.jpg

If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent's graveyard from anywhere, exile it instead.

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Swamp

Color Identity:B

Market Price: $0.01

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/59661_200w.jpg

({T}: Add {B}.)

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Blood Crypt

Color Identity:B,R

Market Price: $15.55

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/182838_200w.jpg

({T}: Add {B} or {R}.)
As Blood Crypt enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

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Alpine Moon

Color Identity:R

Market Price: $8.07

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/169066_200w.jpg

As Alpine Moon enters the battlefield, choose a nonbasic land card name.
Lands your opponents control with the chosen name lose all land types and abilities, and they gain "{T}: Add one mana of any color."

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Lightning Bolt

Color Identity:R

Market Price: $2.29

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/216484_200w.jpg

Lightning Bolt deals 3 damage to any target.

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Undead Augur

Color Identity:B

Market Price: $0.25

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/248774_200w.jpg

Whenever Undead Augur or another Zombie you control dies, you draw a card and you lose 1 life.

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Inquisition of Kozilek

Color Identity:B

Market Price: $2.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/128476_200w.jpg

Target player reveals their hand. You choose a nonland card from it with mana value 3 or less. That player discards that card.

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Village Rites

Color Identity:B

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/230172_200w.jpg

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

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Feed the Swarm

Color Identity:B

Market Price: $0.43

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/254250_200w.jpg

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

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Headless Rider

Color Identity:B

Market Price: $1.91

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/253458_200w.jpg

Whenever Headless Rider or another nontoken Zombie you control dies, create a 2/2 black Zombie creature token.

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Unclaimed Territory

Market Price: $0.54

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/254252_200w.jpg

As Unclaimed Territory enters the battlefield, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

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Goblin Bombardment

Color Identity:R

Market Price: $1.08

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/239839_200w.jpg

Sacrifice a creature: Goblin Bombardment deals 1 damage to any target.

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Gravecrawler

Color Identity:B

Market Price: $15.12

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/113263_200w.jpg

Gravecrawler can't block.
You may cast Gravecrawler from your graveyard as long as you control a Zombie.

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Sulfurous Springs

Color Identity:B,R

Market Price: $18.55

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/15345_200w.jpg

{T}: Add {C}.
{T}: Add {B} or {R}. Sulfurous Springs deals 1 damage to you.

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Mainboard

Sideboard

By adding red, you unlock access to staples such as Lightning Bolt with the addition of Dreadhorde Butcher, a creature that can become out of hand if left unresolved. If the zombie warrior does die, it can deal damage to any target equal to its power, which makes it decent sacrifice fodder for either Carrion Feeder or Goblin Bombardment. If you are looking to fully optimize this list (or have the cards already), adding a playset of either Polluted Delta or Bloodstained Mire (removing 4 Swamps) will ensure you hit your red sources with ease. Ideally, running both playsets of fetch lands gives you the best probability to draw into more creatures, but these cards remain expensive at present. 

Either way, Rakdos Zombies gives you a great footing to take extra game actions while piling on the zombies for your opponent to answer. While zombies aren't the most powerful of MTG tribes at present, it's one of the most fun tribes, with a good chance of seeing more support in upcoming sets. It's without a doubt that another return to Innistrad will happen in the future, and it'll be interesting to see where zombies feature in Modern when that return happens.