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

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.

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

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

Nevinyrral's Disk enters the battlefield tapped. {1}, {T}: Destroy all artifacts, creatures, and enchantments.

{T}: Add {C}. {1}, {T}: Add one mana of any color.

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

Star Compass enters the battlefield tapped. {T}: Add one mana of any color that a basic land you control could produce.

{T}, Sacrifice Basal Thrull: Add {B}{B}.

Sacrifice Blood Pet: Add {B}.

Sacrifice Blood Vassal: Add {B}{B}.

Flying Whenever Butcher of Malakir or another creature you control dies, each opponent sacrifices a creature.

When Carrier Thrall dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."

When Demon's Disciple enters the battlefield, each player sacrifices a creature or planeswalker.

When Doomed Dissenter dies, create a 2/2 black Zombie creature token.

{B}, {T}, Sacrifice Doomed Necromancer: Return target creature card from your graveyard to the battlefield.

When Driver of the Dead dies, return target creature card with mana value 2 or less from your graveyard to the battlefield.

When Dutiful Attendant dies, return another target creature card from your graveyard to your hand.

When Elvish Doomsayer dies, each opponent discards a card.

Flying Whenever Falkenrath Noble or another creature dies, target player loses 1 life and you gain 1 life.

When Festering Mummy dies, you may put a -1/-1 counter on target creature.

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.

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.)

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.

{T}, Sacrifice a creature: Return target creature card from your graveyard to the battlefield. Activate only during your upkeep.

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

{T}: Add {B}.

Whenever a nontoken creature you control dies, Midnight Reaper deals 1 damage to you and you draw a card.

When Myr Sire dies, create a 1/1 colorless Phyrexian Myr artifact creature token.

When Nested Shambler dies, create X tapped 1/1 green Squirrel creature tokens, where X is Nested Shambler's power.

Whenever you tap a Swamp for mana, add an additional {B}. {B}: Nirkana Revenant gets +1/+1 until end of turn.

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

When Perilous Myr dies, it deals 2 damage to any target.

When Plaguecrafter enters the battlefield, each player sacrifices a creature or planeswalker. Each player who can't discards a card.

When Ravenous Chupacabra enters the battlefield, destroy target creature an opponent controls.

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

When Serrated Scorpion dies, it deals 2 damage to each opponent and you gain 2 life.

When Shambling Swarm dies, distribute three -1/-1 counters among one, two, or three target creatures. For each -1/-1 counter you put on a creature this way, remove a -1/-1 counter from that creature at the beginning of the next end step.

When Stitcher's Supplier enters the battlefield or dies, mill three cards.

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

{1}{B}{B}, Sacrifice a creature: Return target creature card from your graveyard to your hand.

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

At the beginning of your upkeep, if you have four or more creature cards in your graveyard, you may return target creature card from your graveyard to your hand.

As Palace Siege enters the battlefield, choose Khans or Dragons. • Khans — At the beginning of your upkeep, return target creature card from your graveyard to your hand. • Dragons — At the beginning of your upkeep, each opponent loses 2 life and you gain 2 life.

Destroy target nonartifact creature.

Destroy target creature or planeswalker.

Destroy target creature. You lose 2 life.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Destroy target creature.

As an additional cost to cast this spell, sacrifice a creature. Choose target creature card in your graveyard. Return that card and the sacrificed card to the battlefield under your control at the beginning of your next upkeep. Exile Rescue from the Underworld.

As an additional cost to cast this spell, sacrifice a creature. Add an amount of {B} equal to the sacrificed creature's mana value.

Ebon Stronghold enters the battlefield tapped. {T}: Add {B}. {T}, Sacrifice Ebon Stronghold: Add {B}{B}.

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

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

All creatures get -4/-4 until end of turn.

All creatures get -1/-1 until end of turn for each Swamp you control.

Each player sacrifices six creatures. You create six tapped 2/2 black Zombie creature tokens.

Return target nonlegendary creature card from your graveyard to the battlefield with a -1/-1 counter on it.

Destroy all creatures with mana value 3 or less.