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.)

Flying

{2}{U}, Discard two cards: Return Advanced Stitchwing from your graveyard to the battlefield tapped.

Agonizing Syphon deals 3 damage to any target and you gain 3 life.

Flying

If damage would be dealt to you, prevent that damage and mill twice that many cards.

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

Arvinox, the Mind Flail isn't a creature unless you control three or more permanents you don't own.

At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.

Spells and abilities your opponents control can't cause their controller to search their library.

-1: Target player mills four cards. Then exile each opponent's graveyard.

Lifelink, haste

Create a 1/1 blue and black Horror creature token with flying.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Equipped creature has first strike, trample, and haste.

Equip {1}

Whenever you draw a card, put a +1/+1 counter on Chasm Skulker.

When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.)

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

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

Sacrifice Commander's Sphere: Draw a card.

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.

Mill three cards, then you may return a creature card from your graveyard to your hand. (To mill a card, put the top card of your library into your graveyard.)

Flying

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

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.

Look at the top three cards of your library. Put two of them into your hand and the other into your graveyard. Dark Bargain deals 2 damage to you.

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

Dimir Guildgate enters the battlefield tapped.

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

Dismal Backwater enters the battlefield tapped.

When Dismal Backwater enters the battlefield, you gain 1 life.

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

Reach

Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.)

As long as Doom Weaver is paired with another creature, each of those creatures has "When this creature dies, draw cards equal to its power."

Flying, trample

Pay 2 life: Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Untap all nonland permanents you control.

Whenever a creature dealt damage by Dread Slaver this turn dies, return it to the battlefield under your control. That creature is a black Zombie in addition to its other colors and types.

Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.

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

When Drownyard Amalgam enters the battlefield, target player mills three cards. (They put the top three cards of their library into their graveyard.)

{2}{U}: Drownyard Amalgam can't be blocked this turn.

As an additional cost to cast this spell, sacrifice a creature, discard a card, or pay 4 life.

When Dusk Mangler enters the battlefield, each opponent sacrifices a creature, discards a card, and loses 4 life.

You may cast Eternal Scourge from exile.

When Eternal Scourge becomes the target of a spell or ability an opponent controls, exile Eternal Scourge.

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

Return up to one target creature card from your graveyard to your hand. Venture into the dungeon. (Enter the first room or advance to the next room.)

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

Equipped creature gets +3/+0 and has vigilance and trample.

Whenever equipped creature dies, attach Forebear's Blade to target creature you control.

Equip {3}

Flying

When Foul Watcher enters the battlefield, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Delirium -- Foul Watcher gets +1/+0 as long as there are four or more card types among cards in your graveyard.

Whenever a creature you control becomes blocked, you may return it to its owner's hand.

Whenever one or more creatures you control deal combat damage to a player, draw a card.

Grimdancer enters the battlefield with your choice of two different counters on it from among menace, deathtouch, and lifelink.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Whenever Guiltfeeder attacks and isn't blocked, defending player loses 1 life for each card in their graveyard.

Equipped creature has vigilance, trample, and haste.

Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

{T}, Sacrifice a creature: Return target creature card from your graveyard to the battlefield. Activate only during your upkeep.

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

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Spells can't be countered.

Each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost.

Equipped creature gets +3/+0 and has trample and lifelink.

Equip {3}

Whenever an opponent casts or copies an instant or sorcery spell, they lose 1 life.

Choose one --

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

• Put a card you own from outside the game into your hand.

Dominate Monster -- When Mind Flayer enters the battlefield, gain control of target creature for as long as you control Mind Flayer.

The "legend rule" doesn't apply to permanents you control.

Each legendary creature you control gets +1/+1.

Each nontoken creature you control gets +1/+1 for each other creature you control with the same name as that creature.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Nightmare's power and toughness are each equal to the number of Swamps you control.

{T}: Mill two cards.

{2}, Exile Perpetual Timepiece: Shuffle any number of target cards from your graveyard into your library.

Trample

Whenever a source deals damage to Phyrexian Obliterator, that source's controller sacrifices that many permanents.

Plague Mare can't be blocked by white creatures.

When Plague Mare enters the battlefield, creatures your opponents control get -1/-1 until end of turn.

Port of Karfell enters the battlefield tapped.

{T}: Add {U}.

{3}{U}{B}{B}, {T}, Sacrifice Port of Karfell: Mill four cards, then return a creature card from your graveyard to the battlefield tapped. (To mill a card, put the top card of your library into your graveyard.)

Flying

When Psychic Symbiont enters the battlefield, target opponent discards a card and you draw a card.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand.

Whenever you draw a card, each opponent loses 1 life.

Create a token that's a copy of target creature you control.

Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Choose one --

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

• Return two target creature cards that share a creature type from your graveyard to your hand.

Equipped creature gets +1/+0, has flying, and is a Bird in addition to its other types.

Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

You have no maximum hand size.

{T}: Add {C}.

{T}: Add one mana of any color.

At the beginning of your upkeep, put a night counter on Replicating Ring. Then if it has eight or more night counters on it, remove all of them and create eight colorless snow artifact tokens named Replicated Ring with "{T}: Add one mana of any color."

Until end of turn, target creature gets +1/+0 and gains lifelink and "When this creature dies, return it to the battlefield tapped under its owner's control."

(Gain the next level as a sorcery to add its ability.)

Whenever a creature you control deals combat damage to a player, exile the top card of that player's library face down. You may look at it for as long as it remains exiled.

{1}{U}{B}: Level 2

Creatures you control have menace.

{2}{U}{B}: Level 3

You may play cards exiled with Rogue Class, and you may spend mana as though it were mana of any color to cast those spells.

Flying

Whenever you attack with one or more creatures, target player mills that many cards. (To mill a card, a player puts the top card of their library into their graveyard.)

{2}{U}: Put Screaming Swarm from your graveyard into your library second from the top.

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

Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

{U/P}: Change a target of target spell or ability to Spellskite. ({U/P} can be paid with either {U} or 2 life.)

Delirium -- {1}{B}: Stallion of Ashmouth gets +1/+1 until end of turn. Activate only if there are four or more card types among cards in your graveyard.

({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}.)

Each opponent exiles cards from the top of their library until that player has exiled cards with total mana value 20 or more.

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.

{T}: Add {C}.

{2}, {T}: Target legendary creature becomes a God in addition to its other types. Put a +1/+1 counter on it.

{4}, {T}, Sacrifice Tyrite Sanctum: Put an indestructible counter on target God.

Umbris, Fear Manifest gets +1/+1 for each card your opponents own in exile.

Whenever Umbris or another Nightmare or Horror enters the battlefield under your control, target opponent exiles cards from the top of their library until they exile a land card.

Return target creature card from your graveyard to the battlefield with a lifelink counter on it.

Underworld Charger can't block.

Escape--{4}{B}, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Underworld Charger escapes with two +1/+1 counters on it.

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

Waterfront District enters the battlefield tapped.

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

{2}{U}{B}, {T}, Sacrifice Waterfront District: Draw a card.

({T}: Add {B}.)

Witch's Cottage enters the battlefield tapped unless you control three or more other Swamps.

When Witch's Cottage enters the battlefield untapped, you may put target creature card from your graveyard on top of your library.

(Gain the next level as a sorcery to add its ability.)

You have no maximum hand size.

{2}{U}: Level 2

When this Class becomes level 2, draw two cards.

{4}{U}: Level 3

Whenever you draw a card, put a +1/+1 counter on target creature you control.