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

As Agadeem, the Undercrypt enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.

{T}: Add {B}.

Commander creatures you own have "Whenever an artifact or creature you control is put into a graveyard from the battlefield, each opponent loses 1 life."

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

Sacrifice a creature: Add {C}{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.

Barad-dûr enters the battlefield tapped unless you control a legendary creature.

{T}: Add {B}.

{X}{X}{B}, {T}: Amass Orcs X. Activate only if a creature died this turn.

Barren Moor enters the battlefield tapped.

{T}: Add {B}.

Cycling {B} ({B}, Discard this card: Draw a card.)

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.

{T}, Sacrifice a creature: Blasting Station deals 1 damage to any target.

Whenever a creature enters the battlefield, you may untap Blasting Station.

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.

Spectacle {B} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

Draw a card for each creature that died under your control this turn.

As an additional cost to cast this spell, sacrifice a creature or discard a card.

Destroy target creature or planeswalker.

Black creature spells you cast cost {1} less to cast.

Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

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

{T}: Add {C}.

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

Carrion Feeder can't block.

Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Castle Locthwain enters the battlefield tapped unless you control a Swamp.

{T}: Add {B}.

{1}{B}{B}, {T}: Draw a card, then you lose life equal to the number of cards in your hand.

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

{T}: Add {B}.

Whenever a creature you control dies, put a corpse counter on Crowded Crypt.

{4}{B}{B}, {T}, Sacrifice Crowded Crypt: Create a 2/2 black Zombie creature token with decayed for each corpse counter on Crowded Crypt. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)

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

Add {B}{B}{B}{B}.

Add {B}{B}{B}.

Target creature gets -1/-1 until end of turn for each Swamp you control.

You may sacrifice three black creatures rather than pay this spell's mana cost.

Trample

Flash

Whenever a creature you control dies, each opponent sacrifices a creature.

Return target creature card from your graveyard to the battlefield.

Flashback--Sacrifice three creatures. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

Exile target creature or planeswalker.

Creatures you control get +1/+1 and have flying and indestructible.

At the beginning of your upkeep, sacrifice a creature. If you can't, sacrifice Eldrazi Monument.

As an additional cost to cast this spell, sacrifice X creatures.

Destroy X target creatures.

Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's mana value.

When you control seven or more Thrulls, sacrifice Endrek Sahr, Master Breeder.

Imprint -- When Extraplanar Lens enters the battlefield, you may exile target land you control.

Whenever a land with the same name as the exiled card is tapped for mana, its controller adds one mana of any type that land produced.

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

Flying

Devour 1 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with that many +1/+1 counters on it.)

Whenever Fell Beast of Mordor enters the battlefield or attacks, target opponent loses X life and you gain X life, where X is the number of +1/+1 counters on it.

As Gauntlet of Power enters the battlefield, choose a color.

Creatures of the chosen color get +1/+1.

Whenever a basic land is tapped for mana of the chosen color, its controller adds an additional one mana of that color.

Enchant creature

Enchanted creature has deathtouch and indestructible.

Morph--Sacrifice another creature. (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

As Gift of Doom is turned face up, you may attach it to a creature.

Menace

When God-Eternal Bontu enters the battlefield, sacrifice any number of other permanents, then draw that many cards.

When God-Eternal Bontu dies or is put into exile from the battlefield, you may put it into its owner's library third from the top.

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.

{T}: Add {C}.

{T}, Sacrifice a creature: You gain 1 life.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Destroy target creature or planeswalker. Each creature that convoked Lethal Scheme connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

Sacrifice any number of artifacts, enchantments, and/or tokens. Return that many creature cards from your graveyard to the battlefield.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

Flash

When Liliana's Standard Bearer enters the battlefield, draw X cards, where X is the number of creatures that died under your control this turn.

Whenever a creature you control dies, put a loyalty counter on Lolth, Spider Queen.

0: You draw a card and you lose 1 life.

-3: Create two 2/1 black Spider creature tokens with menace and reach.

-8: You get an emblem with "Whenever an opponent is dealt combat damage by one or more creatures you control, if that player lost less than 8 life this turn, they lose life equal to the difference."

Flying

When Malevolent Witchkite enters the battlefield, sacrifice any number of artifacts, enchantments, and/or tokens, then draw that many cards.

Flying

Whenever you create or sacrifice a token, each opponent loses 1 life.

Mortuary Mire enters the battlefield tapped.

When Mortuary Mire enters the battlefield, you may put target creature card from your graveyard on top of your library.

{T}: Add {B}.

Whenever a token you control leaves the battlefield, each opponent loses 1 life and you gain 1 life.

Whenever a token you control leaves the battlefield, put a +1/+1 counter on Nadier, Agent of the Duskenel.

When Nadier leaves the battlefield, create a number of 1/1 green Elf Warrior creature tokens equal to its power.

Partner (You can have two commanders if both have partner.)

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

Draw two cards. If the sacrificed creature was legendary, draw three cards instead.

Until end of turn, target creature you control gains "When this creature dies, return it to the battlefield tapped under its owner's control, then create a Wicked Role token attached to it." (Enchanted creature gets +1/+1. When this Aura is put into a graveyard, each opponent loses 1 life.)

Whenever another creature enters the battlefield under your control, target creature an opponent controls gets -1/-1 until end of turn.

Whenever Pawn of Ulamog or another nontoken creature you control dies, you may create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this creature: Add {C}."

{T}, Sacrifice Phyrexian Plaguelord: Target creature gets -4/-4 until end of turn.

Sacrifice a creature: Target creature gets -1/-1 until end of turn.

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

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.")

Polluted Mire enters the battlefield tapped.

{T}: Add {B}.

Cycling {2} ({2}, Discard this card: Draw a card.)

Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to its mana value.

You have no maximum hand size.

{T}: Add {C}.

Sacrifice any number of artifacts, creatures, and/or lands. Draw a card for each permanent sacrificed this way.

Lifelink

Blood Chalice -- Whenever another creature you control dies, Sanguinary Priest deals 1 damage to any target.

Devoid (This card has no color.)

Flying

At the beginning of your upkeep, sacrifice a creature.

Whenever you sacrifice a creature, draw a card.

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

As an additional cost to cast this spell, exile a creature you control.

Return target creature card from your graveyard to the battlefield. Put a +2/+2 counter on that creature if the exiled creature was a Thrull.

Sacrifice a creature: Put a charge counter on Spawning Pit.

{1}, Remove two charge counters from Spawning Pit: Create a 2/2 colorless Spawn artifact creature token.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

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.)

{T}: Add {B}.

Channel -- {3}{B}, Discard Takenuma, Abandoned Mire: Mill three cards, then return a creature or planeswalker card from your graveyard to your hand. This ability costs {1} less to activate for each legendary creature you control.

{T}: Add {C}{C}. Activate only if you control five or more lands.

+2: Create two 0/1 black Thrull creature tokens.

+1: You may sacrifice another creature or planeswalker. If you do, draw two cards, then draw another card if the sacrificed permanent was a commander.

-10: Gain control of all commanders. Put all commanders from the command zone onto the battlefield under your control.

Tevesh Szat, Doom of Fools can be your commander.

Partner

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.

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

{1}{B}, Sacrifice a creature: You gain 1 life and draw a card.

Whenever another artifact or creature you control is put into a graveyard from the battlefield, put an oil counter on Vat of Rebirth.

{2}{B}, {T}, Remove four oil counters from Vat of Rebirth: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

Choose two target creature cards in your graveyard. Sacrifice a creature. If you do, return the chosen cards to the battlefield tapped.

Sacrifice a creature: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

{T}: Add {C}.

{3}, {T}, Pay life equal to the number of colors in your commanders' color identity: Draw a card.

Flying

As long as Weatherlight Compleated has four or more phyresis counters on it, it's a Phyrexian creature in addition to its other types.

Whenever a creature you control dies, put a phyresis counter on Weatherlight Compleated. Then draw a card if it has seven or more phyresis counters on it. If it doesn't, scry 1.

{T}: Add {C}.

{5}, {T}, Pay 1 life: Create a 1/1 white and black Human Cleric creature token.

{5}, {T}, Sacrifice five creatures: Transform Westvale Abbey, then untap it.

Flying, lifelink, indestructible, haste

{T}, Sacrifice two creatures: Return target creature card from your graveyard to the battlefield.

({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.

Whenever Zulaport Cutthroat or another creature you control dies, each opponent loses 1 life and you gain 1 life.