When Abyssal Gorestalker enters the battlefield, each player sacrifices two creatures.

Return six target nonland permanents to their owners' hands.

Return all attacking creatures to their owner's hand.

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

Flying

Archfiend of the Dross enters the battlefield with four oil counters on it.

At the beginning of your upkeep, remove an oil counter from Archfiend of the Dross. Then if it has no oil counters on it, you lose the game.

Whenever a creature an opponent controls dies, its controller loses 2 life.

Return target permanent to its owner's hand.

As Choked Estuary enters the battlefield, you may reveal an Island or Swamp card from your hand. If you don't, Choked Estuary enters the battlefield tapped.

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

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

Creeping Tar Pit enters the battlefield tapped.

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

{1}{U}{B}: Creeping Tar Pit becomes a 3/2 blue and black Elemental creature until end of turn and can't be blocked this turn. It's still a land.

Enchant player

Whenever enchanted player is attacked, you draw a card. Each opponent attacking that player does the same.

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

Flying

At the beginning of your upkeep, sacrifice a creature other than Demonic Taskmaster.

Return all nonland permanents to their owners' hands.

Miracle {1}{U} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

{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.

Dismal Backwater enters the battlefield tapped.

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

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

Whenever a permanent deals damage to you, return it to its owner's hand.

Drinker of Sorrow can't block.

Whenever Drinker of Sorrow deals combat damage, sacrifice a permanent.

Flying

Whenever a player casts a spell, you lose 1 life.

Flying

Whenever Emissary of Despair deals combat damage to a player, that player loses 1 life for each artifact they control.

Return all creatures to their owners' hands.

Non-Eye creatures you control can't attack.

Whenever Evil Eye of Urborg becomes blocked by a creature, destroy that creature.

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

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

Whenever Flesh Reaver deals damage to a creature or opponent, Flesh Reaver deals that much damage to you.

At the beginning of your upkeep, sacrifice a permanent.

Whenever Greater Harvester deals combat damage to a player, that player sacrifices two permanents.

You can't cast creature spells.

At the beginning of your upkeep, you lose 2 life.

Morph {2}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Gudul Lurker can't be blocked.

Megamorph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Trample

At the beginning of your upkeep, discard a card if you don't control an Ogre.

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Create a token that's a copy of target creature you control, except the token has flying and it isn't legendary.

({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}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

At the beginning of your end step, target opponent gains control of up to one target creature you control. Put two +1/+1 counters on it and tap it. It's goaded for the rest of the game and it gains "This creature can't be sacrificed." (It attacks each combat if able and attacks a player other than you if able.)

Whenever a creature you own but don't control attacks, you draw a card.

Counter target spell that targets a permanent you control.

Draw a card.

Menace (This creature can't be blocked except by two or more creatures.)

Your opponents can't gain life.

{1}{B}: Knight of Dusk's Shadow gets +1/+1 until end of turn.

{T}: Add {C}.

{T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.

Flying, trample

At the beginning of your upkeep, sacrifice a creature other than Lord of the Pit. If you can't, Lord of the Pit deals 7 damage to you.

{T}: Add {C}.

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

Menace (This creature can't be blocked except by two or more creatures.)

Whenever Morkrut Necropod attacks or blocks, sacrifice another creature or land.

({T}: Add {U}.)

Mystic Sanctuary enters the battlefield tapped unless you control three or more other Islands.

When Mystic Sanctuary enters the battlefield untapped, you may put target instant or sorcery card from your graveyard on top of your library.

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.)

Counter target noncreature spell.

Equipped creature has shroud. (It can't be the target of spells or abilities.)

{U}{U}: Attach Neurok Stealthsuit to target creature you control.

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

Flash

If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card.

Trample

When Phantasmal Dreadmaw becomes the target of a spell or ability, sacrifice it.

At the beginning of your end step, sacrifice each other creature you control.

Discard two cards, Sacrifice Plague Reaver: Choose target opponent. Return Plague Reaver to the battlefield under that player's control at the beginning of their next upkeep.

When Possessed Skaab enters the battlefield, return target instant, sorcery, or creature card from your graveyard to your hand.

If Possessed Skaab would die, exile it instead.

When Rampaging Spiketail enters the battlefield, target creature you control gets +2/+0 and gains indestructible until end of turn.

Swampcycling {2} ({2}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

Exile target artifact or creature. Its controller creates a 1/1 blue Bird creature token with flying.

Foretell {U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

You may choose new targets for target spell.

Counter target creature spell.

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Flying

At the beginning of your upkeep, sacrifice an artifact other than Rust Elemental. If you can't, tap Rust Elemental and you lose 4 life.

Flying

Tribute 2 (As this creature enters the battlefield, an opponent of your choice may put two +1/+1 counters on it.)

When Shrike Harpy enters the battlefield, if tribute wasn't paid, target opponent sacrifices a creature.

Sky Diamond enters the battlefield tapped.

{T}: Add {U}.

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

Soulsworn Spirit can't be blocked.

When Soulsworn Spirit enters the battlefield, detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)

Deathtouch

Descend 4 -- Whenever Stinging Cave Crawler attacks, if there are four or more permanent cards in your graveyard, you draw a card and you lose 1 life.

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

Sunken Hollow 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}.)

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.

Enchant artifact

Enchanted artifact is a creature with base power and toughness 5/5 in addition to its other types.

When enchanted artifact is put into a graveyard, return that card to its owner's hand.

Triton Shorestalker can't be blocked.

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.)

Vigilance, menace

Descend 8 -- {4}{U}{B}: Return Uchbenbak, the Great Mistake from your graveyard to the battlefield with a finality counter on it. Activate only if there are eight or more permanent cards in your graveyard and only as a sorcery. (If a creature with a finality counter on it would die, exile it instead.)

Flying

Vampire Interloper can't block.

Return target creature to its owner's hand. Its controller loses 1 life.

Vedalken Infiltrator can't be blocked.

Metalcraft -- Vedalken Infiltrator gets +1/+0 as long as you control three or more artifacts.

Flying

When Voracious Fell Beast enters the battlefield, each opponent sacrifices a creature. Create a Food token for each creature sacrificed this way. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")