{T}: Add one mana of any color in your commander's color identity.

Sacrifice a creature: Add {C}{C}.

Charcoal Diamond enters the battlefield tapped. {T}: Add {B}.

Coldsteel Heart enters the battlefield tapped. As Coldsteel Heart enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

When Eye of Vecna enters the battlefield, you draw a card and you lose 2 life. At the beginning of your upkeep, you may pay {2}. If you do, you draw a card and you lose 2 life.

{T}: Add one mana of any color that a land an opponent controls could produce.

At the beginning of combat on your turn, equipped creature or a creature you control named Vecna gets +X/+X until end of turn, where X is the number of cards in your hand. Equip—Pay 1 life for each card in your hand. Equip {2}

{T}: Add {C}. {1}, {T}, Sacrifice Mind Stone: Draw a card.

Sacrifice a creature: Add one mana of any color.

Equipped creature gets +1/-1. Whenever equipped creature dies, draw two cards. Equip {1}

At the beginning of your upkeep, you may put a soot counter on Smokestack. At the beginning of each player's upkeep, that player sacrifices a permanent for each soot counter on Smokestack.

{T}: Add {C}{C}.

At the beginning of your end step, if you lost 2 or more life this turn, create a 2/2 black Zombie creature token. {T}, Exile The Book of Vile Darkness and artifacts you control named Eye of Vecna and Hand of Vecna: Create Vecna, a legendary 8/8 black Zombie God creature token with indestructible and all triggered abilities of the exiled cards.

You have no maximum hand size. {T}: Add {C}.

Whenever Ayara, First of Locthwain or another black creature enters the battlefield under your control, each opponent loses 1 life and you gain 1 life. {T}, Sacrifice another black creature: Draw a card.

Flying Echo {2}{B} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When Bone Shredder enters the battlefield, destroy target nonartifact, nonblack creature.

At the beginning of your end step, you may sacrifice an artifact, creature, enchantment, land, or planeswalker. If you do, each opponent may sacrifice a permanent that shares a card type with it. For each opponent who doesn't, that player loses 2 life and you draw a card.

Clattering Augur can't block. When Clattering Augur enters the battlefield, you draw a card and you lose 1 life. {2}{B}{B}: Return Clattering Augur from your graveyard to your hand.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Whenever you tap a Swamp for mana, add an additional {B}.

{B}{B}, {T}: Destroy target green creature.

Whenever a creature deals combat damage to one of your opponents, its controller may pay 1 life. If they do, they draw a card. {4}{B}{B}{B}, Discard X cards: Exile the top X cards of target opponent's library. You may play lands and cast spells from among cards exiled this way without paying their mana costs.

Whenever you draw your second card each turn, each opponent loses 2 life and you gain 2 life. When Gixian Puppeteer dies, return another target creature card with mana value 3 or less from your graveyard to the battlefield.

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.)

When Greedy Freebooter dies, scry 1 and create a Treasure token. (To scry 1, look at the top card of your library. You may put that card on the bottom. A Treasure token is an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Secrets of the Soul — {T}, Sacrifice another creature: Add an amount of {B} equal to the sacrificed creature's mana value.

At the beginning of your end step, if you control no creatures with decayed, create a 2/2 black Zombie creature token with decayed. (It can't block. When it attacks, sacrifice it at end of combat.)

({B/P} can be paid with either {B} or 2 life.) Lifelink For each {B} in a cost, you may pay 2 life rather than pay that mana. Whenever you cast a black spell, put a +1/+1 counter on K'rrik, Son of Yawgmoth.

{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)

When Novice Occultist dies, you draw a card and you lose 1 life.

At the beginning of each upkeep, if you control no Snakes, create a 1/1 black Snake creature token with deathtouch.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Whenever Order of Yawgmoth deals damage to a player, that player discards a card.

When Phyrexian Delver enters the battlefield, return target creature card from your graveyard to the battlefield. You lose life equal to that card's mana value.

You may choose not to untap Phyrexian Gremlins during your untap step. {T}: Tap target artifact. It doesn't untap during its controller's untap step for as long as Phyrexian Gremlins remains tapped.

When Phyrexian Rager enters the battlefield, you draw a card and you lose 1 life.

Whenever a creature you control dies, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

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.")

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) {T}: Add {C}.

When Priest of Gix enters the battlefield, add {B}{B}{B}.

{1}{B}: Return Reassembling Skeleton from your graveyard to the battlefield tapped.

Phalanx Commander — When Royal Warden enters the battlefield, create two tapped 2/2 black Necron Warrior artifact creature tokens. Unearth {3}{B} ({3}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

{T}, Sacrifice a black or artifact creature: Add an amount of {B} equal to the sacrificed creature's mana value.

Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad, the Grim deals 1 damage to each opponent. {1}{B}: Each player mills a card. (They each put the top card of their library into their graveyard.)

Whenever a creature dies, put a charge counter on Black Market. At the beginning of your precombat main phase, add {B} for each charge counter on Black Market.

At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature. If a land is tapped for mana, it produces {B} instead of any other type and amount.

Sacrifice a creature: Destroy target artifact. Activate only during your upkeep and only once each turn.

Whenever a creature you control dies, each other player sacrifices a creature.

When Hecatomb enters the battlefield, sacrifice Hecatomb unless you sacrifice four creatures. Tap an untapped Swamp you control: Hecatomb deals 1 damage to any target.

Whenever a nontoken creature you control dies, create a 2/2 black Zombie creature token.

Whenever a player casts a spell, that player discards a card.

At the beginning of your upkeep, you draw a card and you lose 1 life.

Cumulative upkeep {B} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) At the beginning of your end step, draw a card for each age counter on Phyrexian Etchings. When Phyrexian Etchings is put into a graveyard from the battlefield, you lose 2 life for each age counter on it.

{1}{B}, Pay 2 life: Return target creature card from your graveyard to your hand.

Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") At the beginning of your upkeep, if you control ten or more Treasures, you win the game.

{B}{B}, Pay 2 life, Sacrifice a Swamp: Return target creature card from your graveyard to the battlefield.

Add {B}{B}{B}.

{2}, {T}: Add {B} for each Swamp you control.

{T}: Add {C}. {2}, {T}, Sacrifice Demolition Field: Destroy target nonbasic land an opponent controls. That land's controller may search their library for a basic land card, put it onto the battlefield, then shuffle. You may search your library for a basic land card, put it onto the battlefield, then shuffle.

{T}: Add {C}. {T}, Sacrifice a creature: Add {B}{B}.

You have no maximum hand size. {T}: Add {C}.

({T}: Add {B}.)

Discard your hand. Search your library for three cards, put them into your hand, then shuffle.

Target player draws two cards and loses 2 life.

Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.

As an additional cost to cast this spell, pay X life. All creatures get -X/-X until end of turn.