Flying, trample

You can't win the game and your opponents can't lose the game.

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 spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.

You draw a card at the beginning of the next turn's upkeep.

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

Flying

At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.

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.

You may have Auton Soldier enter the battlefield as a copy of any creature on the battlefield, except it isn't legendary, is an artifact in addition to its other types, and has myriad. (Whenever it attacks, for each opponent other than defending player, you may put a token that's a copy of this creature onto the battlefield tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Flying

At the beginning of your upkeep, target player draws a card and loses 1 life.

Equipped creature gets +2/+0 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)

{1}: Attach Bloodthirsty Blade to target creature an opponent controls. Activate only as a sorcery.

Flash

Polymorphine -- You may have Callidus Assassin enter the battlefield tapped as a copy of any creature on the battlefield, except it has "When this creature enters the battlefield, destroy up to one other target creature with the same name as this creature."

Changeling (This card is every creature type.)

Changeling Outcast can't block and can't be blocked.

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}.

You may have Clone enter the battlefield as a copy of any creature on the battlefield.

Coldsteel Heart enters the battlefield tapped.

As Coldsteel Heart enters the battlefield, choose a color.

{T}: Add one mana of the chosen color.

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

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

You have no maximum hand size.

{T}: Add one mana of any color.

Flying

Lieutenant -- As long as you control your commander, Demon of Wailing Agonies gets +2/+2 and has "Whenever Demon of Wailing Agonies deals combat damage to a player, that player sacrifices a creature."

Flying

At the beginning of each combat, any opponent may sacrifice a creature. If a player does, tap Desecration Demon and put a +1/+1 counter on it.

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

Counter target spell with mana value 4 or greater.

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.)

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

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

You may have Evil Twin enter the battlefield as a copy of any creature on the battlefield, except it has "{U}{B}, {T}: Destroy target creature with the same name as this creature."

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

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

You may have Flesh Duplicate enter the battlefield as a copy of any creature on the battlefield, except it has vanishing 3 if that creature doesn't have vanishing. (A permanent with vanishing 3 enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

You may have Gigantoplasm enter the battlefield as a copy of any creature on the battlefield, except it has "{X}: This creature has base power and toughness X/X."

Destroy target nonartifact creature.

Creature spells you cast cost {2} less to cast.

Creatures you control get -1/-1.

Flying

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Whenever Identity Thief attacks, you may exile another target nontoken creature. If you do, Identity Thief becomes a copy of that creature until end of turn. Return the exiled card to the battlefield under its owner's control at the beginning of the next end step.

Flying

At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature or pays 3 life.

Destroy target creature. You lose 2 life.

({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.

Flash

Flying

You may have Malleable Impostor enter the battlefield as a copy of a creature an opponent controls, except it's a Faerie Shapeshifter in addition to its other types and it has flying.

Flying

At the beginning of your upkeep, each opponent draws a card.

Flying, trample

When Mindwrack Demon enters the battlefield, mill four cards.

Delirium -- At the beginning of your upkeep, you lose 4 life unless there are four or more card types among cards in your graveyard.

You may have Mirrorhall Mimic enter the battlefield as a copy of any creature on the battlefield, except it's a Spirit in addition to its other types.

Disturb {3}{U}{U} (You may cast this card from your graveyard transformed for its disturb cost.)

Enchant creature

At the beginning of your upkeep, create a token that's a copy of enchanted creature, except it's a Spirit in addition to its other types.

If Ghastly Mimicry would be put into a graveyard from anywhere, exile it instead.

Flash

You may have Mocking Doppelganger enter the battlefield as a copy of a creature an opponent controls, except it has "Other creatures with the same name as this creature are goaded." (They attack each combat if able and attack a player other than you if able.)

Counter target noncreature spell.

Blue spells and red spells you cast cost {1} less to cast.

{1}{B}: Regenerate Nightscape Familiar.

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.

Choose a creature type. If you control more creatures of that type than each other player, you gain control of all creatures of that type. (This effect lasts indefinitely.)

({U/P} can be paid with either {U} or 2 life.)

You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

At the beginning of your upkeep, repeat the following process for each opponent in turn order. Reveal the top card of your library. That player may pay life equal to that card's mana value. If they do, exile that card. Otherwise, put it into your hand.

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

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.)

Flash

Enchant creature

Whenever enchanted creature is dealt damage, its controller loses that much life.

Exile target creature. Its controller manifests the top card of their library. (That player puts the top card of their library onto the battlefield face down as a 2/2 creature. If it's a creature card, it can be turned face up any time for its mana cost.)

Flying

Morbid -- At the beginning of each end step, if a creature died this turn, destroy target non-Demon creature.

Untap all creatures you control and all creatures target opponent controls. You and that opponent each gain control of all creatures the other controls until end of turn. Those creatures gain haste until end of turn.

You have no maximum hand size.

{T}: Add {C}.

Kicker {5} (You may pay an additional {5} as you cast this spell.)

Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.

{T}: Add {U}. If you played a land this turn, add {B} instead.

Flying

When Rune-Scarred Demon enters the battlefield, search your library for a card, put it into your hand, then shuffle.

This spell can't be copied.

Choose one. If an opponent has eight or more cards in their graveyard, you may choose both.

• Copy target spell. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

• Create a token that's a copy of target creature.

Flying

When Shadowborn Demon enters the battlefield, destroy target non-Demon creature.

At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature.

Sky Diamond enters the battlefield tapped.

{T}: Add {U}.

Put a +1/+1 counter on target creature. It phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

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

Each opponent sacrifices a creature or planeswalker with the highest mana value among creatures and planeswalkers they control.

Flying

As Sower of Discord enters the battlefield, choose two players.

Whenever damage is dealt to one of the chosen players, the other chosen player also loses that much life.

Spectacle {1}{B}{B} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

Flying, trample

At the beginning of your upkeep, Spawn of Mayhem deals 1 damage to each player. Then if you have 10 or less life, put a +1/+1 counter on Spawn of Mayhem.

Counter target noncreature spell unless its controller pays {1}.

Ferocious -- If you control a creature with power 4 or greater, counter that spell instead.

Flash

You may have Stunt Double enter the battlefield as a copy of any creature on the battlefield.

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

Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

{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 {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 {C}.

{T}: Add {U} or {B}. Activate only if you control a Swamp.

{T}: Add {C}.

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

You have no maximum hand size.

{T}: Add {C}.

You may have Undercover Operative enter the battlefield as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

{T}: Add {C}.

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

You may have Vizier of Many Faces enter the battlefield as a copy of any creature on the battlefield, except if Vizier of Many Faces was embalmed, the token has no mana cost, it's white, and it's a Zombie in addition to its other types.

Embalm {3}{U}{U}

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.