({B/R} can be paid with either {B} or {R}.) Flying When Avatar of Discord enters the battlefield, sacrifice it unless you discard two cards.

{T}, Discard a card: Up to one target creature can't be blocked this turn. Whenever Key to the City becomes untapped, you may pay {2}. If you do, draw a card.

Trample Whenever Neheb, Dreadhorde Champion deals combat damage to a player or planeswalker, you may discard any number of cards. If you do, draw that many cards and add that much {R}. Until end of turn, you don't lose this mana as steps and phases end.

Discard your hand.

At the beginning of your upkeep, you may return Squee, Goblin Nabob from your graveyard to your hand.

Akoum Refuge enters the battlefield tapped. When Akoum Refuge enters the battlefield, you gain 1 life. {T}: Add {B} or {R}.

{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.)

Barren Moor enters the battlefield tapped. {T}: Add {B}. Cycling {B} ({B}, Discard this card: Draw a card.)

Bloodfell Caves enters the battlefield tapped. When Bloodfell Caves enters the battlefield, you gain 1 life. {T}: Add {B} or {R}.

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

{T}: Add {C}. {3}: Return Drownyard Temple from your graveyard to the battlefield tapped.

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

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

Forgotten Cave enters the battlefield tapped. {T}: Add {R}. Cycling {R} ({R}, Discard this card: Draw a card.)

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

Memorial to Folly enters the battlefield tapped. {T}: Add {B}. {2}{B}, {T}, Sacrifice Memorial to Folly: Return target creature card from your graveyard to your hand.

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}.

({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.

Rakdos Carnarium enters the battlefield tapped. When Rakdos Carnarium enters the battlefield, return a land you control to its owner's hand. {T}: Add {B}{R}.

{T}: Add {C}. {1}{B}{R}, {T}: Each player discards a card. Activate only as a sorcery.

Smoldering Crater enters the battlefield tapped. {T}: Add {R}. Cycling {2} ({2}, Discard this card: Draw a card.)

({T}: Add {B}.)

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

Flying Whenever a source an opponent controls deals damage to Archfiend of Spite, that source's controller loses that much life unless they sacrifice that many permanents. Madness {3}{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.)

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.)

Enchant player Whenever enchanted player draws a card, they lose 2 life and you gain 2 life. Madness {3}{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.)

Madness {X}{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.) Create three tapped 2/2 black Zombie creature tokens and you gain 3 life. If this spell's madness cost was paid, instead create X of those tokens and you gain X life.

Gain control of target creature until end of turn. Untap that creature. It gets +2/+0 and gains haste until end of turn. Madness {3}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

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.)

Flash When Muck Drubb enters the battlefield, change the target of target spell that targets only a single creature to Muck Drubb. Madness {2}{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 you discard a card, you may exile that card from your graveyard. {2}, {T}: Draw a card, then discard a card. {T}: Put a card exiled with Currency Converter into your graveyard. If it's a land card, create a Treasure token. If it's a nonland card, create a 2/2 black Rogue creature token.

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

Whenever you discard a creature card, put a +1/+1 counter on Surly Badgersaur. Whenever you discard a land card, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") Whenever you discard a noncreature, nonland card, Surly Badgersaur fights up to one target creature you don't control.

Return target black creature card from your graveyard to your hand. Madness {0} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

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.

Return target creature card from your graveyard to the battlefield. When you discard Edgar's Awakening, you may pay {B}. When you do, return target creature card from your graveyard to your hand.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.) {X}{B}: Put target artifact or creature card with mana value X from an opponent's graveyard onto the battlefield under your control tapped. Then that player mills X cards.

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.) When Grave Scrabbler enters the battlefield, if its madness cost was paid, you may return target creature card from a graveyard to its owner's hand.

{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.

When Revolutionist enters the battlefield, return target instant or sorcery card from your graveyard to your hand. Madness {3}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

{2}{B}: Return Sanitarium Skeleton from your graveyard to your hand.

Alchemist's Greeting deals 4 damage to target creature. Madness {1}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Madness {X}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) Avacyn's Judgment deals 2 damage divided as you choose among any number of targets. If this spell's madness cost was paid, it deals X damage divided as you choose among those permanents and/or players instead.

When Big Game Hunter enters the battlefield, destroy target creature with power 4 or greater. It can't be regenerated. Madness {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.)

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

Destroy target nonblack creature. Madness {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.)

Fiery Temper deals 3 damage to any target. Madness {R} (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 Gorgon Recluse blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat. Madness {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.)

Each opponent sacrifices a creature or enchantment.

Destroy target tapped creature. 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.)

As an additional cost to cast this spell, discard X cards. Nahiri's Wrath deals damage equal to the total mana value of the discarded cards to each of up to X target creatures and/or planeswalkers.

First strike When Nightshade Assassin enters the battlefield, you may reveal X black cards in your hand. If you do, target creature gets -X/-X until end of turn. 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.)

Flying When Overseer of the Damned enters the battlefield, you may destroy target creature. Whenever a nontoken creature an opponent controls dies, create a tapped 2/2 black Zombie creature token.

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

When Shadowgrange Archfiend enters the battlefield, each opponent sacrifices a creature with the greatest power among creatures they control. You gain life equal to the greatest power among creatures sacrificed this way. Madness—{2}{B}, Pay 8 life. (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Destroy target creature. Madness {B}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Anje's Ravager attacks each combat if able. Whenever Anje's Ravager attacks, discard your hand, then draw three cards. Madness {1}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

{2}, {T}, Sacrifice Armillary Sphere: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.

Whenever Conspiracy Theorist attacks, you may pay {1} and discard a card. If you do, draw a card. Whenever you discard one or more nonland cards, you may exile one of them from your graveyard. If you do, you may cast it this turn.

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.)

Discard a card, then draw a card. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Trample Whenever Stromkirk Occultist deals combat damage to a player, exile the top card of your library. Until end of turn, you may play that card. Madness {1}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

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

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.)

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

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

Whenever you discard one or more cards, create a tapped 2/2 black Zombie creature token. This ability triggers only once each turn.

Whenever you cycle or discard a card, you may pay {1}. If you do, each opponent loses 2 life and you gain 2 life.

Haste Whenever you discard a card, Glint-Horn Buccaneer deals 1 damage to each opponent. {1}{R}, Discard a card: Draw a card. Activate only if Glint-Horn Buccaneer is attacking.

Destroy all creatures you don't control and all planeswalkers you don't control.

Put target artifact or creature card from a graveyard onto the battlefield under your control. Shuffle Beacon of Unrest into its owner's library.

Exile up to five target creature cards from graveyards. An opponent separates those cards into two piles. Put all cards from the pile of your choice onto the battlefield under your control and the rest into their owners' graveyards.

{3}{B}{B}, {T}, Sacrifice X other creatures: Return X target creature cards from your graveyard to the battlefield. {5}{B}{B}: Put Champion of Stray Souls on top of your library from your graveyard.

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.) Whenever Flayer of the Hatebound or another creature enters the battlefield from your graveyard, that creature deals damage equal to its power to any target.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.