You can't win the game and your opponents can't lose the game.
6 /
6
{1}{B}
Altar's Reap
Instant
As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.
--
Blighted Fen
Land
{T}: Add {C}.
{4}{B}, {T}, Sacrifice Blighted Fen: Target opponent sacrifices a creature.
{3}{B}
Blood for Bones
Sorcery
As an additional cost to cast this spell, sacrifice a creature.
Return a creature card from your graveyard to the battlefield, then return another creature card from your graveyard to your hand.
{4}{B}{B}
Bloodsoaked Altar
Artifact
{T}, Pay 2 life, Discard a card, Sacrifice a creature: Create a 5/5 black Demon creature token with flying. Activate only as a sorcery.
{1}
Bloodtallow Candle
Artifact
{6}, {T}, Sacrifice Bloodtallow Candle: Target creature gets -5/-5 until end of turn.
{5}{B}{B}
Butcher of Malakir
Creature - Vampire Warrior
Flying
Whenever Butcher of Malakir or another creature you control dies, each opponent sacrifices a creature.
5 /
4
{4}{B}{B}{B}
Chancellor of the Dross
Creature - Phyrexian Vampire
You may reveal this card from your opening hand. If you do, at the beginning of the first upkeep, each opponent loses 3 life, then you gain life equal to the life lost this way.
Flying, lifelink
6 /
6
{3}{B}{B}
Consume the Meek
Instant
Destroy each creature with mana value 3 or less. They can't be regenerated.
{1}{B}
Costly Plunder
Instant
As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards.
{2}
Cranial Archive
Artifact
{2}, Exile Cranial Archive: Target player shuffles their graveyard into their library. Draw a card.
{3}{B}
Dark Bargain
Instant
Look at the top three cards of your library. Put two of them into your hand and the other into your graveyard. Dark Bargain deals 2 damage to you.
{X}{B}
Death Wind
Instant
Target creature gets -X/-X until end of turn.
{B}
Death's Approach
Enchantment - Aura
Enchant creature
Enchanted creature gets -X/-X, where X is the number of creature cards in its controller's graveyard.
{5}{B}{B}
Deathbringer Regent
Creature - Dragon
Flying
When Deathbringer Regent enters the battlefield, if you cast it from your hand and there are five or more other creatures on the battlefield, destroy all other creatures.
5 /
6
{2}
Demon's Horn
Artifact
Whenever a player casts a black spell, you may gain 1 life.
{2}
Diamond Mare
Artifact Creature - Horse
As Diamond Mare enters the battlefield, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.
1 /
3
{2}{B}
Dirge of Dread
Sorcery
All creatures gain fear until end of turn. (They can't be blocked except by artifact creatures and/or black creatures.)
Cycling {1}{B} ({1}{B}, Discard this card: Draw a card.)
When you cycle Dirge of Dread, you may have target creature gain fear until end of turn.
{8}
Distended Mindbender
Creature - Eldrazi Insect
Emerge {5}{B}{B} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)
When you cast this spell, target opponent reveals their hand. You choose from it a nonland card with mana value 3 or less and a card with mana value 4 or greater. That player discards those cards.
5 /
5
{B}{B}
Drudge Spell
Enchantment
{B}, Exile two creature cards from your graveyard: Create a 1/1 black Skeleton creature token. It has "{B}: Regenerate this creature."
When Drudge Spell leaves the battlefield, destroy all Skeleton tokens. They can't be regenerated.
{1}{B}
Dusk Legion Zealot
Creature - Vampire Soldier
When Dusk Legion Zealot enters the battlefield, you draw a card and you lose 1 life.
1 /
1
{1}{B}
Eternal Taskmaster
Creature - Zombie
Eternal Taskmaster enters the battlefield tapped.
Whenever Eternal Taskmaster attacks, you may pay {2}{B}. If you do, return target creature card from your graveyard to your hand.
2 /
3
{B}{B}
Fear
Enchantment - Aura
Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)
Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)
{2}{B}
Fortuitous Find
Sorcery
Choose one or both --
• Return target artifact card from your graveyard to your hand.
• Return target creature card from your graveyard to your hand.
{3}{B}
Gavony Unhallowed
Creature - Zombie
Whenever another creature you control dies, put a +1/+1 counter on Gavony Unhallowed.
2 /
4
--
Grasping Dunes
Land - Desert
{T}: Add {C}.
{1}, {T}, Sacrifice Grasping Dunes: Put a -1/-1 counter on target creature. Activate only as a sorcery.
{2}{B}
Grim Haruspex
Creature - Human Wizard
Morph {B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
Whenever another nontoken creature you control dies, draw a card.
3 /
2
{3}
Hierophant's Chalice
Artifact
When Hierophant's Chalice enters the battlefield, target opponent loses 1 life and you gain 1 life.
{T}: Add {C}.
{4}{B}
Homicidal Seclusion
Enchantment
As long as you control exactly one creature, that creature gets +3/+1 and has lifelink.
{2}{B}{B}
Hornet Harasser
Creature - Goblin Shaman
When Hornet Harasser dies, target creature gets -2/-2 until end of turn.
2 /
2
{3}{B}{B}
Indulgent Tormentor
Creature - Demon
Flying
At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature or pays 3 life.
5 /
3
{4}{B}{B}
Laquatus's Champion
Creature - Nightmare Horror
When Laquatus's Champion enters the battlefield, target player loses 6 life.
When Laquatus's Champion leaves the battlefield, that player gains 6 life.
{B}: Regenerate Laquatus's Champion.
6 /
3
{1}{B}
Last Gasp
Instant
Target creature gets -3/-3 until end of turn.
{3}
Lightning Coils
Artifact
Whenever a nontoken creature you control dies, put a charge counter on Lightning Coils.
At the beginning of your upkeep, if Lightning Coils has five or more charge counters on it, remove all of them from it and create that many 3/1 red Elemental creature tokens with haste. Exile them at the beginning of the next end step.
{2}{B}
Liliana's Elite
Creature - Zombie
Liliana's Elite gets +1/+1 for each creature card in your graveyard.
1 /
1
{3}
Magistrate's Scepter
Artifact
{4}, {T}: Put a charge counter on Magistrate's Scepter.
{T}, Remove three charge counters from Magistrate's Scepter: Take an extra turn after this one.
{3}
Mana Geode
Artifact
When Mana Geode enters the battlefield, scry 1.
{T}: Add one mana of any color.
{3}
Manalith
Artifact
{T}: Add one mana of any color.
{3}{B}{B}
Massacre Girl
Legendary Creature - Human Assassin
Menace
When Massacre Girl enters the battlefield, each other creature gets -1/-1 until end of turn. Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.
4 /
4
{2}{B}
Mephitic Vapors
Sorcery
All creatures get -1/-1 until end of turn.
Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
{1}{B}
Nausea
Sorcery
All creatures get -1/-1 until end of turn.
{2}{B}{B}
Necromantic Thirst
Enchantment - Aura
Enchant creature
Whenever enchanted creature deals combat damage to a player, you may return target creature card from your graveyard to your hand.
{B}
Necrotic Wound
Instant
Undergrowth -- Target creature gets -X/-X until end of turn, where X is the number of creature cards in your graveyard. If that creature would die this turn, exile it instead.
{1}
Nihil Spellbomb
Artifact
{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.
{2}{B}
Ob Nixilis's Cruelty
Instant
Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead.
{2}{B}
Phyrexian Rager
Creature - Phyrexian Horror
When Phyrexian Rager enters the battlefield, you draw a card and you lose 1 life.
2 /
2
{2}{B}
Recover
Sorcery
Return target creature card from your graveyard to your hand.
Draw a card.
{1}{B}{B}
Relic Bane
Enchantment - Aura
Enchant artifact
Enchanted artifact has "At the beginning of your upkeep, you lose 2 life."
{3}{B}
Rising Miasma
Sorcery
All creatures get -2/-2 until end of turn.
Awaken 3--{5}{B}{B} (If you cast this spell for {5}{B}{B}, also put three +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)
{2}
Runed Servitor
Artifact Creature - Construct
When Runed Servitor dies, each player draws a card.
2 /
2
{1}{B}
Rush of Vitality
Instant
Target creature gets +1/+0 and gains lifelink and indestructible until end of turn. (Damage dealt by that creature also causes its controller to gain that much life, and it can't be destroyed by damage or effects that say "destroy.")
{4}{B}
Ruthless Disposal
Sorcery
As an additional cost to cast this spell, discard a card and sacrifice a creature.
Two target creatures each get -13/-13 until end of turn.
{3}{B}
Scavenging Ghoul
Creature - Zombie
At the beginning of each end step, put a corpse counter on Scavenging Ghoul for each creature that died this turn.
Remove a corpse counter from Scavenging Ghoul: Regenerate Scavenging Ghoul.
2 /
2
{7}
Scour from Existence
Instant
Exile target permanent.
{3}
Seer's Lantern
Artifact
{T}: Add {C}.
{2}, {T}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
{2}{B}
Sick and Tired
Instant
Two target creatures each get -1/-1 until end of turn.
{3}{B}
Smoldering Butcher
Creature - Elemental Warrior
Wither (This deals damage to creatures in the form of -1/-1 counters.)
4 /
2
{1}
Soul Net
Artifact
Whenever a creature dies, you may pay {1}. If you do, you gain 1 life.
{1}{B}{B}
Succumb to Temptation
Instant
You draw two cards and you lose 2 life.
{1}{B}{B}
Sudden Spoiling
Instant
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Until end of turn, creatures target player controls lose all abilities and have base power and toughness 0/2.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{B}
Torture
Enchantment - Aura
Enchant creature
{1}{B}: Put a -1/-1 counter on enchanted creature.
{4}
Treasure Keeper
Artifact Creature - Construct
When Treasure Keeper dies, reveal cards from the top of your library until you reveal a nonland card with mana value 3 or less. You may cast that card without paying its mana cost. Put all revealed cards not cast this way on the bottom of your library in a random order.
3 /
3
{X}
Ugin's Conjurant
Creature - Spirit Monk
Ugin's Conjurant enters the battlefield with X +1/+1 counters on it.
If damage would be dealt to Ugin's Conjurant while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from Ugin's Conjurant.
0 /
0
{B}
Vampiric Rites
Enchantment
{1}{B}, Sacrifice a creature: You gain 1 life and draw a card.
{1}{B}
Vicious Offering
Instant
Kicker--Sacrifice a creature. (You may sacrifice a creature in addition to any other costs as you cast this spell.)
Target creature gets -2/-2 until end of turn. If this spell was kicked, that creature gets -5/-5 until end of turn instead.
{5}{B}{B}{B}
Vilis, Broker of Blood
Legendary Creature - Demon
Flying
{B}, Pay 2 life: Target creature gets -1/-1 until end of turn.
Whenever you lose life, draw that many cards. (Damage causes loss of life.)
8 /
8
{2}{B}
Virulent Plague
Enchantment
Creature tokens get -2/-2.
{1}
Wand of Vertebrae
Artifact
{T}: Mill a card.
{2}, {T}, Exile Wand of Vertebrae: Shuffle up to five target cards from your graveyard into your library.
{3}
Wine of Blood and Iron
Artifact
{4}: Target creature gets +X/+0 until end of turn, where X is its power. Sacrifice Wine of Blood and Iron at the beginning of the next end step.
{3}
Workshop Assistant
Artifact Creature - Construct
When Workshop Assistant dies, return another target artifact card from your graveyard to your hand.
1 /
2
{3}{B}
Ambition's Cost
Sorcery
You draw three cards and you lose 3 life.
{3}{B}
Ancient Craving
Sorcery
You draw three cards and you lose 3 life.
{1}{B}
Bloodcrazed Paladin
Creature - Vampire Knight
Flash
Bloodcrazed Paladin enters the battlefield with a +1/+1 counter on it for each creature that died this turn.
1 /
1
{B}
Bubbling Muck
Sorcery
Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional {B}.
--
Cabal Stronghold
Land
{T}: Add {C}.
{3}, {T}: Add {B} for each basic Swamp you control.
{B}
Dark Ritual
Instant
Add {B}{B}{B}.
{B}{B}
Dash Hopes
Instant
When you cast this spell, any player may pay 5 life. If a player does, counter Dash Hopes.
Counter target spell.
{B}{B}
Deathgrip
Enchantment
{B}{B}: Counter target green spell.
{B}
Defile
Instant
Target creature gets -1/-1 until end of turn for each Swamp you control.
{B}
Demonic Vigor
Enchantment - Aura
Enchant creature
Enchanted creature gets +1/+1.
When enchanted creature dies, return that card to its owner's hand.
{2}{B}{B}
Diabolic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{4}
Dingus Staff
Artifact
Whenever a creature dies, Dingus Staff deals 2 damage to that creature's controller.
{2}
Dowsing Dagger
Artifact - Equipment
When Dowsing Dagger enters the battlefield, target opponent creates two 0/2 green Plant creature tokens with defender.
Equipped creature gets +2/+1.
Whenever equipped creature deals combat damage to a player, you may transform Dowsing Dagger.
Equip {2}
--
Lost Vale
Land
(Transforms from Dowsing Dagger.)
{T}: Add three mana of any one color.
{2}
Genesis Chamber
Artifact
Whenever a nontoken creature enters the battlefield, if Genesis Chamber is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.
{3}{B}{B}
Gray Merchant of Asphodel
Creature - Zombie
When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)
2 /
4
{2}{B}
Grim Return
Instant
Choose target creature card in a graveyard that was put there from the battlefield this turn. Put that card onto the battlefield under your control.
{B}
Kaya's Ghostform
Enchantment - Aura
Enchant creature or planeswalker you control
When enchanted permanent dies or is put into exile, return that card to the battlefield under your control.
{X}{B}
Killing Wave
Sorcery
For each creature, its controller sacrifices it unless they pay X life.
{2}{B}{B}
Languish
Sorcery
All creatures get -4/-4 until end of turn.
{2}{B}{B}
Massacre
Sorcery
If an opponent controls a Plains and you control a Swamp, you may cast this spell without paying its mana cost.
All creatures get -2/-2 until end of turn.
{2}{B}{B}
Mutilate
Sorcery
All creatures get -1/-1 until end of turn for each Swamp you control.
{1}{B}
No Rest for the Wicked
Enchantment
Sacrifice No Rest for the Wicked: Return to your hand all creature cards in your graveyard that were put there from the battlefield this turn.
{3}
Nuisance Engine
Artifact
{2}, {T}: Create a 0/1 colorless Pest artifact creature token.
{3}{B}
Pitiless Plunderer
Creature - Human Pirate
Whenever another creature you control dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
1 /
4
{X}{B}{B}
Profane Command
Sorcery
Choose two --
• Target player loses X life.
• Return target creature card with mana value X or less from your graveyard to the battlefield.
• Target creature gets -X/-X until end of turn.
• Up to X target creatures gain fear until end of turn. (They can't be blocked except by artifact creatures and/or black creatures.)
{2}{B}
Read the Bones
Sorcery
Scry 2, then draw two cards. You lose 2 life.
{B}
Scheming Symmetry
Sorcery
Choose two target players. Each of them searches their library for a card, then shuffles and puts that card on top.
{B}{B}
Sign in Blood
Sorcery
Target player draws two cards and loses 2 life.
{B}
Spoils of Blood
Instant
Create an X/X black Horror creature token, where X is the number of creatures that died this turn.
{4}
Trading Post
Artifact
{1}, {T}, Discard a card: You gain 4 life.
{1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token.
{1}, {T}, Sacrifice a creature: Return target artifact card from your graveyard to your hand.
{1}, {T}, Sacrifice an artifact: Draw a card.
{B}
Tragic Slip
Instant
Target creature gets -1/-1 until end of turn.
Morbid -- That creature gets -13/-13 until end of turn instead if a creature died this turn.
{B}
Undying Evil
Instant
Target creature gains undying until end of turn. (When it 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.)
{2}{B}
Unholy Indenture
Enchantment - Aura
Enchant creature
When enchanted creature dies, return that card to the battlefield under your control with a +1/+1 counter on it.
{1}{B}
Withering Boon
Instant
As an additional cost to cast this spell, pay 3 life.
Counter target creature spell.
{2}{B}{B}
Yahenni's Expertise
Sorcery
All creatures get -3/-3 until end of turn.
You may cast a spell with mana value 3 or less from your hand without paying its mana cost.