Whenever an opponent discards a card, Abyssal Nocturnus gets +2/+2 and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

+1: Each opponent discards a card and loses 2 life.

-3: Gain control of target creature until end of turn. Untap it. It gains haste until end of turn. Sacrifice it at the beginning of the next end step if it has mana value 3 or less.

-8: Each opponent loses life equal to the number of cards in their graveyard.

You may mill two cards. Then return up to two creature cards from your graveyard to your hand. (To mill two cards, put the top two cards of your library into your graveyard.)

Flying

Whenever you cycle or discard another card, put a -1/-1 counter on each creature your opponents control.

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

Backup 1 (When this creature enters the battlefield, put a +1/+1 counter on target creature. If that's another creature, it gains the following abilities until end of turn.)

Deathtouch

Whenever this creature deals combat damage to a player or battle, return target creature card from your graveyard to the battlefield.

{T}: Add {C}.

Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

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.)

At the beginning of combat on your turn, you may discard a card. If you do, choose a creature. Whenever that creature deals combat damage to a player this turn, you draw two cards.

Flying

Whenever Balor attacks or dies, choose one or more. Each mode must target a different player.

• Target opponent draws three cards, then discards three cards at random.

• Target opponent sacrifices a nontoken artifact.

• Balor deals damage to target opponent equal to the number of cards in their hand.

As an additional cost to cast this spell, discard a card or pay 3 life.

Destroy target creature or planeswalker.

Sacrifice Blood Pet: Add {B}.

Blood Petal Celebrant has first strike as long as it's attacking.

When Blood Petal Celebrant dies, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")

{1}{B}, Discard a card: Bloodsworn Squire gains indestructible until end of turn. Tap it. Then if there are four or more creature cards in your graveyard, transform Bloodsworn Squire. (Damage and effects that say "destroy" don't destroy it.)

Bloodsworn Knight's power and toughness are each equal to the number of creature cards in your graveyard.

{1}{B}, Discard a card: Bloodsworn Knight gains indestructible until end of turn. Tap it. (Damage and effects that say "destroy" don't destroy it.)

Each player draws three cards, then discards three cards at random.

({T}: Add {B} or {R}.)

Canyon Slough enters the battlefield tapped.

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

Discard a card: You may cast a creature spell from your graveyard this turn. Activate only once each turn.

Whenever a nontoken creature enters the battlefield under your control, if you didn't cast it from your hand, it gains haste until your next turn.

+1: Create two 3/1 red Elemental creature tokens with haste. Exile them at the beginning of the next end step.

0: Discard all the cards in your hand, then draw that many cards plus one.

-X: Chandra, Flamecaller deals X damage to each creature.

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

Whenever you discard a card, you may exile that card from your graveyard. If you do, you may play that card this turn.

Add {B}{B}{B}.

Each player loses X life, discards X cards, sacrifices X creatures, then sacrifices X lands.

Whenever you cast a noncreature spell, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Delirium -- As long as there are four or more card types among cards in your graveyard, Dragon's Rage Channeler gets +2/+2, has flying, and attacks each combat if able.

When Entomber Exarch enters the battlefield, choose one --

• Return target creature card from your graveyard to your hand.

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

As long as your opponents control no creatures, Erebos's Titan has indestructible. (Damage and effects that say "destroy" don't destroy it.)

Whenever a creature card leaves an opponent's graveyard, you may discard a card. If you do, return Erebos's Titan from your graveyard to your hand.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Draw two cards, then discard two cards.

Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

{2}{R}, {T}: Create a token that's a copy of target creature card in your graveyard, except it's an artifact in addition to its other types. It gains haste. Sacrifice it at the beginning of the next end step.

Flying

When Fell Specter enters the battlefield, target opponent discards a card.

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

As Foreboding Ruins enters the battlefield, you may reveal a Swamp or Mountain card from your hand. If you don't, Foreboding Ruins enters the battlefield tapped.

{T}: Add {B} or {R}.

{T}: Add {C}.

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

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

{1}, {T}, Discard a card: Put a study counter on Grimoire of the Dead.

{T}, Remove three study counters from Grimoire of the Dead and sacrifice it: Put all creature cards from all graveyards onto the battlefield under your control. They're black Zombies in addition to their other colors and types.

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

Whenever you cast a creature spell, you may discard a card. If you do, draw a card.

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.

Choose two --

• Return target creature card from your graveyard to your hand.

• Target player discards a card.

• Destroy target artifact.

• Kolaghan's Command deals 2 damage to any target.

When Kroxa enters the battlefield, sacrifice it unless it escaped.

Whenever Kroxa enters the battlefield or attacks, each opponent discards a card, then each opponent who didn't discard a nonland card this way loses 3 life.

Escape--{B}{B}{R}{R}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Trample, haste

Whenever Lightning Skelemental deals combat damage to a player, that player discards two cards.

At the beginning of the end step, sacrifice Lightning Skelemental.

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

Lifelink

Whenever another nontoken creature you control dies, exile Liliana, Heretical Healer, then return her to the battlefield transformed under her owner's control. If you do, create a 2/2 black Zombie creature token.

+2: Each player discards a card.

-X: Return target nonlegendary creature card with mana value X from your graveyard to the battlefield.

-8: You get an emblem with "Whenever a creature dies, return it to the battlefield under your control at the beginning of the next end step."

{1}{R}, {T}, Sacrifice Magus of the Wheel: Each player discards their hand, then draws seven cards.

Undergrowth -- Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle.

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

Choose one. If you descended this turn, you may choose both instead. (You descended if a permanent card was put into your graveyard from anywhere.)

• Destroy target creature or planeswalker.

• Destroy target noncreature, nonland permanent with mana value 1 or less.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

Myriad Landscape enters the battlefield tapped.

{T}: Add {C}.

{2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

Necrogoyf's power is equal to the number of creature cards in all graveyards.

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

Madness {1}{B}{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.)

When Nezumi Informant enters the battlefield, each opponent discards a card.

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.)

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

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.

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.

Flying, first strike, haste

Whenever Rankle and Torbran deals combat damage to a player or battle, choose any number --

• Each player creates a Treasure token.

• Each player sacrifices a creature.

• If a source would deal damage to a player or battle this turn, it deals that much damage plus 2 instead.

Choose one or more --

• Each player discards two cards.

• Each player loses 4 life.

• Each player sacrifices two creatures.

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.

When Rotting Rats enters the battlefield, each player discards a card.

Unearth {1}{B} ({1}{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.)

Flying

Whenever a creature an opponent controls dies, you may gain 3 life.

Whenever an opponent discards a card, you may gain 3 life.

{1}, {T}: Add {B}{R}.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.

At the beginning of each opponent's upkeep, that player sacrifices a creature.

At the beginning of each end step, each player discards their hand.

({T}: Add {B} or {R}.)

Smoldering Marsh enters the battlefield tapped unless you control two or more basic lands.

({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.)

Temple of Malice enters the battlefield tapped.

When Temple of Malice enters the battlefield, scry 1.

{T}: Add {B} or {R}.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

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.

At the beginning of each end step, if a player discarded a card this turn, create a 1/1 black Bird creature token with flying and "This creature can't block."

{3}{B}, {T}: Each opponent discards a card. Activate only as a sorcery.

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

Draw two cards.

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.

Troll of Khazad-dûm can't be blocked except by three or more creatures.

Swampcycling {1} ({1}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

Return target creature card with mana value 3 or less from your graveyard to the battlefield.

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

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

Draw two cards.

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.

Deathtouch

At the beginning of your end step, if you descended this turn, each opponent may discard a card or sacrifice a permanent. Zoyowa Lava-Tongue deals 3 damage to each opponent who didn't. (You descended if a permanent card was put into your graveyard from anywhere.)