Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control."

When Abyssal Gorestalker enters the battlefield, each player sacrifices two creatures.

Flying, lifelink

Whenever Aclazotz attacks, each opponent discards a card. For each opponent who can't, you draw a card.

Whenever an opponent discards a land card, create a 1/1 black Bat creature token with flying.

When Aclazotz dies, return it to the battlefield tapped and transformed under its owner's control.

(Transforms from Aclazotz, Deepest Betrayal.)

{T}: Add {B}.

{2}{B}, {T}: Transform Temple of the Dead. Activate only if a player has one or fewer cards in hand and only as a sorcery.

{T}, Sacrifice another creature or artifact: Each opponent loses 1 life and you gain 1 life.

When Acquisitions Expert enters the battlefield, target opponent reveals a number of cards from their hand equal to the number of creatures in your party. You choose one of those cards. That player discards that card. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

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}.

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

Flying

At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.

Each opponent discards two cards. If you control a Vampire, each opponent loses 2 life and you gain 2 life.

Until end of turn, target creature gets +2/+0 and gains "When this creature dies or is put into exile from the battlefield, return it to its owner's hand."

You draw two cards and each opponent discards two cards. Each player loses 2 life.

When Baleful Beholder enters the battlefield, choose one --

• Antimagic Cone -- Each opponent sacrifices an enchantment.

• Fear Ray -- Creatures you control gain menace until end of turn. (A creature with menace can't be blocked except by two or more creatures.)

Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Whenever Banshee of the Dread Choir deals combat damage to a player, that player discards 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.

({2/B} can be paid with any two mana or with {B}. This card's mana value is 6.)

Search your library for a card with mana value less than or equal to the number of lands you control, reveal it, put it into your hand, then shuffle.

Will of the council -- Starting with you, each player votes for sickness or psychosis. If sickness gets more votes, creatures your opponents control get -2/-2 until end of turn. If psychosis gets more votes or the vote is tied, each opponent discards two cards.

Menace (This creature can't be blocked except by two or more creatures.)

Blackbloom Rogue gets +3/+0 as long as an opponent has eight or more cards in their graveyard.

Blackbloom Bog enters the battlefield tapped.

{T}: Add {B}.

Bojuka Bog enters the battlefield tapped.

When Bojuka Bog enters the battlefield, exile target player's graveyard.

{T}: Add {B}.

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)

I -- You may sacrifice a creature. If you do, each opponent discards a card.

II -- Return target creature card from your graveyard to your hand.

III -- Target opponent may sacrifice a nonland, nontoken permanent. If they don't, they lose 2 life and you draw a card.

When Burglar Rat enters the battlefield, each opponent discards a card.

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.)

Flying

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

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

{T}: Add {C}.

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

Council's dilemma -- Starting with you, each player votes for death or taxes. Each opponent sacrifices a creature for each death vote and discards a card for each taxes vote.

When this Case enters the battlefield, create a 2/1 black Skeleton creature token and suspect it. (It has menace and can't block.)

To solve -- You control no suspected Skeletons. (If unsolved, solve at the beginning of your end step.)

Solved -- {1}{B}, Sacrifice this Case: Search your library for a card, put it into your hand, then shuffle. Activate only as a sorcery.

Charcoal Diamond enters the battlefield tapped.

{T}: Add {B}.

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

Sacrifice Commander's Sphere: Draw a card.

At the beginning of your upkeep, each player discards a card. Each opponent who discarded a card that shares a card type with the card you discarded loses 3 life. (Players reveal the discarded cards simultaneously.)

{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.)

Add {B}{B}{B}.

At the beginning of each opponent's upkeep, if that player has one or fewer cards in hand, Davriel, Rogue Shadowmage deals 2 damage to them.

-1: Target player discards a card.

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

Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Flash

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

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

Target player reveals their hand. You choose an artifact or creature card from it. That player discards that card.

Whenever a Swamp enters the battlefield under your control, choose one --

• You draw a card and you lose 1 life.

• Dread Presence deals 2 damage to any target and you gain 2 life.

Everglades enters the battlefield tapped.

When Everglades enters the battlefield, sacrifice it unless you return an untapped Swamp you control to its owner's hand.

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

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."

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.)

{T}: Add three mana of any one color.

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

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

Flying, menace

When Junji, the Midnight Sky dies, choose one --

• Each opponent discards two cards and loses 2 life.

• Put target non-Dragon creature card from a graveyard onto the battlefield under your control. You lose 2 life.

For each creature, its controller sacrifices it unless they pay X life.

{T}: Add {B}.

Whenever a creature you control dies, draw a card.

+1: Create a 2/2 black Zombie creature token.

-4: Each player sacrifices two creatures.

-9: Each opponent chooses a permanent they control of each permanent type and sacrifices the rest.

+1: Each player discards a card. Each opponent who can't loses 3 life.

-3: Target creature gets -X/-X until end of turn, where X is the number of cards in your graveyard.

-7: You get an emblem with "At the beginning of combat on your turn, put target creature card from a graveyard onto the battlefield under your control. It gains haste."

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."

Choose target creature. You lose 2 life. Until end of turn, that creature gains "When this creature dies, return it to the battlefield tapped under its owner's control."

Malakir Mire enters the battlefield tapped.

{T}: Add {B}.

Each opponent sacrifices a creature or enchantment.

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}.

Roll a d20.

1--9 | Choose an opponent. That player sacrifices a creature.

10--19 | Each opponent sacrifices a creature.

20 | Each opponent sacrifices a creature with the greatest power among creatures that player controls.

Skip your draw step.

Whenever you discard a card, exile that card from your graveyard.

Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.

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

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

Pelakka Caverns enters the battlefield tapped.

{T}: Add {B}.

{T}: Add {C}.

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

Suspend 2--{1}{B} (Rather than cast this card from your hand, pay {1}{B} and exile it with two time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

Search your library for a card, put that card into your hand, then shuffle.

Persist (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.)

Whenever an opponent discards a card, you may put a quest counter on Quest for the Nihil Stone.

At the beginning of each opponent's upkeep, if that player has no cards in hand and Quest for the Nihil Stone has two or more quest counters on it, you may have that player lose 5 life.

{T}: Add one mana of any color.

Tap an untapped legendary creature you control: Add one mana of any color.

{1}{B}, {T}, Sacrifice another creature: Draw X cards, where X is that creature's power.

Choose a Background (You can have a Background as a second commander.)

Menace

When Sheoldred enters the battlefield, each opponent sacrifices a nontoken creature or planeswalker.

{4}{B}: Exile Sheoldred, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery and only if an opponent has eight or more cards in their graveyard.

(As this Saga enters and after your draw step, add a lore counter.)

I -- For each opponent, destroy up to one target creature or planeswalker that player controls.

II -- Each opponent discards three cards, then mills three cards.

III -- Put all creature cards from all graveyards onto the battlefield under your control. Exile The True Scriptures, then return it to the battlefield (front face up).

Choose one --

• Each opponent sacrifices a nontoken creature.

• Each opponent sacrifices a creature token.

• Each opponent sacrifices a planeswalker.

Equipped creature gets +1/-1.

Whenever equipped creature dies, draw two cards.

Equip {1}

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

({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}.)

({T}: Add {B}.)

{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.

Menace

Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control.

{T}: Target player loses 3 life unless they sacrifice a nonland permanent or discard a card.

{3}{B}: Untap Tergrid's Lantern.

As The Black Gate enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.

{T}: Add {B}.

{1}{B}, {T}: Choose a player with the most life or tied for most life. Target creature can't be blocked by creatures that player controls this turn.

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

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

When Tithing Blade enters the battlefield, each opponent sacrifices a creature.

Craft with creature {4}{B} ({4}{B}, Exile this artifact, Exile a creature you control or a creature card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.

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.)

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."

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

Draw two cards.

({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.

Worn Powerstone enters the battlefield tapped.

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

Protection from Humans

Pay 1 life, Sacrifice another creature: Put a -1/-1 counter on up to one target creature and draw a card.

{B}{B}, Discard a card: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)