+2: Exile the top three cards of target opponent's library.
-X: Put a creature card with mana value X exiled with Ashiok, Nightmare Weaver onto the battlefield under your control. That creature is a Nightmare in addition to its other types.
-10: Exile all cards from all opponents' hands and graveyards.
L:
3
{4}
Bonehoard
Artifact - Equipment
Living weapon (When this Equipment enters the battlefield, create a 0/0 black Phyrexian Germ creature token, then attach this to it.)
Equipped creature gets +X/+X, where X is the number of creature cards in all graveyards.
Equip {2}
{2}{U}
Bruvac the Grandiloquent
Legendary Creature - Human Advisor
If an opponent would mill one or more cards, they mill twice that many cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)
1 /
4
{2}{U}{U}
Charix, the Raging Isle
Legendary Creature - Leviathan Crab
Spells your opponents cast that target Charix, the Raging Isle cost {2} more to cast.
{3}: Charix gets +X/-X until end of turn, where X is the number of Islands you control.
0 /
17
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{3}{U}{B}
Consuming Aberration
Creature - Horror
Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards.
Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.
* /
*
{1}{U}{U}
Court of Cunning
Enchantment
When Court of Cunning enters the battlefield, you become the monarch.
At the beginning of your upkeep, any number of target players each mill two cards. If you're the monarch, each of those players mills ten cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)
{4}{U}{U}
Cut Your Losses
Sorcery
Casualty 2 (As you cast this spell, you may sacrifice a creature with power 2 or greater. When you do, copy this spell and you may choose a new target for the copy.)
Target player mills half their library, rounded down.
{3}{B}
Deadly Rollick
Instant
If you control a commander, you may cast this spell without paying its mana cost.
Exile target creature.
{1}{B}
Demonic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{1}{U}{B}
Dimir Doppelganger
Creature - Shapeshifter
{1}{U}{B}: Exile target creature card from a graveyard. Dimir Doppelganger becomes a copy of that card, except it has this ability.
0 /
2
{2}
Dimir Signet
Artifact
{1}, {T}: Add {U}{B}.
{U}{B}
Disciple of Deceit
Creature - Human Rogue
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.
1 /
3
{2}{U}{U}
Dreamborn Muse
Creature - Spirit
At the beginning of each player's upkeep, that player mills X cards, where X is the number of cards in their hand.
2 /
2
{U}{B}
Drown in the Loch
Instant
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.
--
Drowned Catacomb
Land
Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.
{3}{U}{B}
Extract from Darkness
Sorcery
Each player mills two cards. Then you put a creature card from a graveyard onto the battlefield under your control.
{5}{U}{U}
Fleet Swallower
Creature - Fish
Whenever Fleet Swallower attacks, target player mills half their library, rounded up.
6 /
6
{U}{U}{U}
Fractured Sanity
Sorcery
Each opponent mills fourteen cards.
Cycling {1}{U} ({1}{U}, Discard this card: Draw a card.)
When you cycle Fractured Sanity, each opponent mills four cards.
{2}{U}
Fraying Sanity
Enchantment - Aura Curse
Enchant player
At the beginning of each end step, enchanted player mills X cards, where X is the number of cards put into their graveyard from anywhere this turn.
{2}{U}
Freed from the Real
Enchantment - Aura
Enchant creature
{U}: Tap enchanted creature.
{U}: Untap enchanted creature.
{4}{B}{B}
Geth, Lord of the Vault
Legendary Creature - Phyrexian Zombie
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.
5 /
5
{U}{B}
Glimpse the Unthinkable
Sorcery
Target player mills ten cards.
{2}{B}{B}
Grisly Spectacle
Instant
Destroy target nonartifact creature. Its controller mills cards equal to that creature's power.
{U}
Hedron Crab
Creature - Crab
Landfall -- Whenever a land enters the battlefield under your control, target player mills three cards.
0 /
2
{2}{U}
Hover Barrier
Creature - Illusion Wall
Defender, flying
0 /
6
{X}{U}
Increasing Confusion
Sorcery
Target player mills X cards. If this spell was cast from a graveyard, that player mills twice that many cards instead.
Flashback {X}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
{U}
Jace's Phantasm
Creature - Illusion
Flying
Jace's Phantasm gets +4/+4 as long as an opponent has ten or more cards in their graveyard.
1 /
1
{3}{U}{U}
Jace, Memory Adept
Legendary Planeswalker - Jace
+1: Draw a card. Target player mills a card.
0: Target player mills ten cards.
-7: Any number of target players each draw twenty cards.
L:
4
{U}{U}{B}{B}
Lazav, Dimir Mastermind
Legendary Creature - Shapeshifter
Hexproof
Whenever a creature card is put into an opponent's graveyard from anywhere, you may have Lazav, Dimir Mastermind become a copy of that card, except its name is Lazav, Dimir Mastermind, it's legendary in addition to its other types, and it has hexproof and this ability.
3 /
3
{2}
Lightning Greaves
Artifact - Equipment
Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}
{1}{U}
Maddening Cacophony
Sorcery
Kicker {3}{U}
Each opponent mills eight cards. If this spell was kicked, instead each opponent mills half their library, rounded up.
{1}{U}{U}
Memory Erosion
Enchantment
Whenever an opponent casts a spell, that player mills two cards.
{U/B}{U/B}{U/B}{U/B}
Memory Plunder
Instant
You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost.
{5}{U}{U}
Mind's Dilation
Enchantment
Whenever an opponent casts their first spell each turn, that player exiles the top card of their library. If it's a nonland card, you may cast it without paying its mana cost.
{2}
Mindcrank
Artifact
Whenever an opponent loses life, that player mills that many cards. (Damage causes loss of life.)
{3}{U}{B}
Mirko Vosk, Mind Drinker
Legendary Creature - Vampire
Flying
Whenever Mirko Vosk, Mind Drinker deals combat damage to a player, that player reveals cards from the top of their library until they reveal four land cards, then puts those cards into their graveyard.
2 /
4
{1}{U}{B}
Mnemonic Betrayal
Sorcery
Exile all opponents' graveyards. You may cast spells from among those cards this turn, and you may spend mana as though it were mana of any type to cast those spells. At the beginning of the next end step, if any of those cards remain exiled, return them to their owners' graveyards.
Exile Mnemonic Betrayal.
{3}{U}{B}
Nemesis of Reason
Creature - Leviathan Horror
Whenever Nemesis of Reason attacks, defending player mills ten cards.
3 /
7
{1}{B}{B}
Nighthowler
Enchantment Creature - Horror
Bestow {2}{B}{B} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Nighthowler and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards.
0 /
0
{3}{U/B}{U/B}{U/B}
Oona, Queen of the Fae
Legendary Creature - Faerie Wizard
Flying
{X}{U/B}: Choose a color. Target opponent exiles the top X cards of their library. For each card of the chosen color exiled this way, create a 1/1 blue and black Faerie Rogue creature token with flying.
5 /
5
{2}{B}
Opposition Agent
Creature - Human Rogue
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.
3 /
2
{3}{U}{U}
Patient Rebuilding
Enchantment
At the beginning of your upkeep, target opponent mills three cards, then you draw a card for each land card put into their graveyard this way.
{3}{U}{B}
Phenax, God of Deception
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
Creatures you control have "{T}: Target player mills X cards, where X is this creature's toughness."
4 /
7
{2}{U}
Psychic Corrosion
Enchantment
Whenever you draw a card, each opponent mills two cards.
{1}{U}{B}
Psychic Strike
Instant
Counter target spell. Its controller mills two cards.
{2}{U}
Riddlekeeper
Creature - Homunculus
Whenever a creature attacks you or a planeswalker you control, that creature's controller mills two cards.
1 /
4
{7}{B}{B}
Rise of the Dark Realms
Sorcery
Put all creature cards from all graveyards onto the battlefield under your control.
{U}
Ruin Crab
Creature - Crab
Landfall -- Whenever a land enters the battlefield under your control, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.)
0 /
3
{3}
Sands of Delirium
Artifact
{X}, {T}: Target player mills X cards.
{3}{B}
Sewer Nemesis
Creature - Horror
As Sewer Nemesis enters the battlefield, choose a player.
Sewer Nemesis's power and toughness are each equal to the number of cards in the chosen player's graveyard.
Whenever the chosen player casts a spell, that player mills a card.
* /
*
{3}{U}
Shadow Kin
Creature - Shapeshifter
Flash
At the beginning of your upkeep, each player mills three cards. You may exile a creature card from among the cards milled this way. If you do, Shadow Kin becomes a copy of that card, except it has this ability.
2 /
2
{4}{U}{B}
Sire of Stagnation
Creature - Eldrazi
Devoid (This card has no color.)
Whenever a land enters the battlefield under an opponent's control, that player exiles the top two cards of their library and you draw two cards.
5 /
7
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{2}{U}{U}
Startled Awake
Sorcery
Target opponent mills thirteen cards.
{3}{U}{U}: Put Startled Awake from your graveyard onto the battlefield transformed. Activate only as a sorcery.
--
Persistent Nightmare
Creature - Nightmare
Skulk (This creature can't be blocked by creatures with greater power.)
When Persistent Nightmare deals combat damage to a player, return it to its owner's hand.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{3}{B}{B}
Syr Konrad, the Grim
Legendary Creature - Human Knight
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.)
5 /
4
{3}{U}{U}{B}{B}
Szadek, Lord of Secrets
Legendary Creature - Vampire
Flying
If Szadek, Lord of Secrets would deal combat damage to a player, instead put that many +1/+1 counters on Szadek and that player mills that many cards.
5 /
5
--
Tainted Isle
Land
{T}: Add {C}.
{T}: Add {U} or {B}. Activate only if you control a Swamp.
{4}{B}{B}
The Haunt of Hightower
Legendary Creature - Vampire
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.
3 /
3
{1}{U}{B}
Thief of Sanity
Creature - Specter
Flying
Whenever Thief of Sanity deals combat damage to a player, look at the top three cards of that player's library, exile one of them face down, then put the rest into their graveyard. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast it.
2 /
2
{1}{U}{U}
Thought Collapse
Instant
Counter target spell. Its controller mills three cards.
{3}
Thousand-Year Elixir
Artifact
You may activate abilities of creatures you control as though those creatures had haste.
{1}, {T}: Untap target creature.
{3}{U}{U}
Traumatize
Sorcery
Target player mills half their library, rounded down.
{3}{U}
Undead Alchemist
Creature - Zombie
If a Zombie you control would deal combat damage to a player, instead that player mills that many cards.
Whenever a creature card is put into an opponent's graveyard from their library, exile that card and create a 2/2 black Zombie creature token.
4 /
2
{1}{U}{U}
Wall of Frost
Creature - Wall
Defender
Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step.
0 /
7
{1}{B}
Wight of Precinct Six
Creature - Zombie
Wight of Precinct Six gets +1/+1 for each creature card in your opponents' graveyards.
1 /
1
{3}{U}{U}{B}
Wrexial, the Risen Deep
Legendary Creature - Kraken
Islandwalk, swampwalk (This creature can't be blocked as long as defending player controls an Island or a Swamp.)
Whenever Wrexial, the Risen Deep deals combat damage to a player, you may cast target instant or sorcery card from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.
5 /
8
{2}{U}
Zellix, Sanity Flayer
Legendary Creature - Horror
Hive Mind -- Whenever a player mills one or more creature cards, you create a 1/1 black Horror creature token.
{1}, {T}: Target player mills three cards.
Choose a Background (You can have a Background as a second commander.)