When Black Cat dies, target opponent discards a card at random.

When Court of Ambition enters the battlefield, you become the monarch. At the beginning of your upkeep, each opponent loses 3 life unless they discard a card. If you're the monarch, instead each opponent loses 6 life unless they discard two cards.

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.)

At the beginning of your upkeep, each player discards a card.

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.

Each player discards three cards.

Target opponent reveals their hand. You choose a creature or planeswalker 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.

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

Flying When Fell Specter enters the battlefield, target opponent discards a card. Whenever an opponent discards a card, that player loses 2 life.

Target player discards two cards. Morbid — If a creature died this turn, instead that player reveals their hand, you choose two cards from it, then that player discards those cards.

Target player discards a card, then mills a card.

+1: Each player discards a card. −2: Target player sacrifices a creature. −6: Separate all permanents target player controls into two piles. That player sacrifices all permanents in the pile of their choice.

Whenever an opponent discards a card, that player loses 2 life.

{T}, Sacrifice Liliana's Steward: Target opponent discards a card. Activate only as a sorcery.

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Target player discards two cards.

Target player discards a card for each Swamp you control.

At the beginning of each player's upkeep, that player discards a card.

Whenever an opponent casts a spell, that player loses 5 life unless they discard a card.

Target player discards a card. If a land card is discarded this way, return Psychic Miasma to its owner's hand.

Whenever an opponent discards a card, that player loses 2 life. Raid — At the beginning of your end step, if you attacked this turn, target opponent discards a card.

Target opponent discards two cards. Mill two cards.

Flying, haste Whenever Rankle, Master of Pranks deals combat damage to a player, choose any number — • Each player discards a card. • Each player loses 1 life and draws a card. • Each player sacrifices a creature.

Choose one — • Target opponent reveals their hand and discards all colorless nonland cards. • Target opponent reveals their hand and discards all multicolored cards.

Flying, lifelink Whenever The Haunt of Hightower attacks, defending player discards a card. Whenever a card is put into an opponent's graveyard from anywhere, put a +1/+1 counter on The Haunt of Hightower.

Kicker {B}{B} (You may pay an additional {B}{B} as you cast this spell.) Protection from white Whenever an opponent discards a card, put a +1/+1 counter on Tourach, Dread Cantor. When Tourach enters the battlefield, if it was kicked, target opponent discards two cards at random.

Flying Whenever Urgoros, the Empty One deals combat damage to a player, that player discards a card at random. If the player can't, you draw a card.

Whenever an opponent discards a creature card, create a 2/2 black Zombie creature token. Whenever an opponent discards a land card, add {B}{B}. Whenever an opponent discards a noncreature, nonland card, draw a card.

At the beginning of each player's upkeep, if that player has no cards in hand, you draw a card and you lose 1 life. Madness {1}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Whenever an opponent discards a card, you may draw a card.

Target player draws two cards and loses 2 life.

Target player draws two cards and loses 2 life.

At the beginning of each end step, if an opponent discarded a card this turn, you draw a card and you lose 1 life. {4}{B}{B}: Each opponent with no cards in hand loses 10 life.

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile target player's graveyard. {T}: Add {B}.

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 {C}. {2}, {T}: Each player draws a card, then discards a card.

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}.

Lifelink

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip {0}

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

{T}: Add one mana of any color. {4}, {T}: Each player who controls a permanent named Bonder's Ornament draws a card.

{T}: Add one mana of any color in your commander's color identity. Sacrifice Commander's Sphere: Draw a card.

Add {B}{B}{B}.

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")

When Mana Geode enters the battlefield, scry 1. {T}: Add one mana of any color.

If you would draw a card while you have no cards in hand, draw two cards instead. If you would gain life while you have 5 or less life, you gain twice that much life instead. {T}: Add one mana of any color.

Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.

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

Destroy target nonblack creature.

Target creature gets -4/-4 until end of turn.

Destroy target creature with power X or less.

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

Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted deals 1 damage to that player. −2: Destroy target creature. Its controller draws two cards.

When Portal to Phyrexia enters the battlefield, each opponent sacrifices three creatures. At the beginning of your upkeep, put target creature card from a graveyard onto the battlefield under your control. It's a Phyrexian in addition to its other types.

Enchant creature Enchanted creature gets -1/-1 for each Swamp you control.

Destroy target creature with power 3 or less.

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.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)