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}.

Flying

Whenever All-Seeing Arbiter enters the battlefield or attacks, draw two cards, then discard a card.

Whenever you discard a card, target creature an opponent controls gets -X/-0 until your next turn, where X is the number of different mana values among cards in your graveyard.

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

Counter target artifact or enchantment spell.

Enchant creature

Enchanted creature doesn't untap during its controller's untap step.

At the beginning of the upkeep of enchanted creature's controller, that player may discard a card at random. If the player does, untap that creature.

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

{U}, Discard an artifact card: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

Instant and sorcery spells you cast cost {1} less to cast.

Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

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

Destroy target creature or planeswalker.

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

Draw four cards, then choose X cards in your hand and discard the rest.

If a player would draw a card, instead they draw a card and reveal it. If it's a creature card, that player discards it unless they pay 3 life.

Draw two cards, then discard two cards.

If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.

{T}: Add {U}.

{T}: Add {B}.

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

Defender

{2}{B}: Transform Concealing Curtains. Activate only as a sorcery.

Menace

When this creature transforms into Revealing Eye, target opponent reveals their hand. You may choose a nonland card from it. If you do, that player discards that card, then draws a card.

Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.

Counter target spell.

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.

Target player discards a card.

Haunt (When this spell card is put into a graveyard after resolving, exile it haunting target creature.)

When the creature Cry of Contrition haunts dies, target player discards a card.

Destroy target creature with total power and toughness 5 or less.

Return target nonland permanent you don't control to its owner's hand.

Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

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

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

Target opponent reveals their hand. You choose a creature or planeswalker card from it. That player discards that card.

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

Inspired -- Whenever Disciple of Deceit becomes untapped, you may discard a nonland card. If you do, search your library for a card with the same mana value as that card, reveal it, put it into your hand, then shuffle.

Counter target instant spell.

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

Draw cards equal to the number of cards target opponent discarded this turn.

Choose one --

• Counter target spell with mana value less than or equal to the number of cards in its controller's graveyard.

• Destroy target creature with mana value less than or equal to the number of cards in its controller's graveyard.

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

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. If you don't control a Faerie, exile a card from your hand.

Flash

Flying

Whenever an opponent draws their second card each turn, you draw a card.

{3}{U}: Each player draws a card.

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

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

Counter target creature spell. If it was a legendary spell, the Ring tempts you.

Destroy target nonartifact creature.

Destroy target creature or planeswalker.

When Hopeless Nightmare enters the battlefield, each opponent discards a card and loses 2 life.

When Hopeless Nightmare is put into a graveyard from the battlefield, scry 2.

{2}{B}: Sacrifice Hopeless Nightmare.

Target player discards a card, then mills a card.

Destroy target creature. You lose 2 life.

({T}: Add {U}.)

({T}: Add {U}.)

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

Flying

Whenever a player casts their second spell each turn, Ledger Shredder connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Destroy target creature or planeswalker. Each creature that convoked Lethal Scheme connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

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

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

{T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.

When Miasmic Mummy enters the battlefield, each player discards a card.

{T}: Add {C}.

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

Counter target instant or sorcery spell unless its controller pays {3}.

{T}, Pay 1 life, Sacrifice Misty Rainforest: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle.

{T}, Tap an untapped artifact or creature you control: Add {C}.

Channel -- {4}{U}, Discard Moonsnare Prototype: The owner of target nonland permanent puts it on the top or bottom of their library.

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

Metalcraft -- {T}: Add one mana of any color. Activate only if you control three or more artifacts.

Suspend 3--{0} (Rather than cast this card from your hand, pay {0} and exile it with three 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.)

{T}: Add one mana of any color.

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

{T}: Add {C}.

{2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

Flash

You control your opponents while they're searching their libraries.

While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.

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

Scry 1.

Draw a card.

This spell costs {1} less to cast for each different mana value among cards in your graveyard.

Whenever you discard a nonland card, you may cast it from your graveyard.

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

Choose one --

• Target creature gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

• Target creature gets +2/-1 until end of turn.

• Target player discards a card.

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

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.

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.

Target player discards a card.

Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Whenever you cast a legendary spell, untap Rona, Herald of Invasion.

{T}: Draw a card, then discard a card.

{5}{B/P}: Transform Rona. Activate only as a sorcery. ({B/P} can be paid with either {B} or 2 life.)

Trample

Whenever a source deals damage to Rona, Tolarian Obliterator, that source's controller exiles a card from their hand at random. If it's a land card, you may put it onto the battlefield under your control. Otherwise, you may cast it without paying its mana cost.

Whenever you cycle or discard a card, you may pay {1}. If you do, put a -1/-1 counter on target creature.

{T}, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.

Counter target artifact or creature spell unless its controller pays {4}.

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).

Shipwreck Marsh enters the battlefield tapped unless you control two or more other lands.

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

Destroy target land.

Flying

Escape--{3}{U}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Skyway Robber escapes with "Whenever Skyway Robber deals combat damage to a player, you may cast an artifact, instant, or sorcery spell from among cards exiled with Skyway Robber without paying its mana cost."

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

{T}, Tap an untapped creature you control: Add one mana of any color.

{T}: Add {C}.

{T}, Sacrifice Strip Mine: Destroy target land.

{T}: Add {C}.

{U/B}, {T}: Add {U}{U}, {U}{B}, or {B}{B}.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

{T}: Add {C}.

{T}: Add {U} or {B}. Talisman of Dominance deals 1 damage to you.

When The Meathook Massacre enters the battlefield, each creature gets -X/-X until end of turn.

Whenever a creature you control dies, each opponent loses 1 life.

Whenever a creature an opponent controls dies, you gain 1 life.

As an additional cost to cast this spell, pay X life.

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

{T}: Add {C}.

{T}: Add {U} or {B}. Underground River deals 1 damage to you.

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

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.)

{T}, Pay 1 life, Sacrifice Verdant Catacombs: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.

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.

{T}: Add {C}.

{T}, Sacrifice Wasteland: Destroy target nonbasic land.

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

As Watery Grave enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.