Bow to My Command

(An ongoing scheme remains face up until it's abandoned.)
As you set this scheme in motion, choose an opponent.
Creatures the chosen player controls can't attack you or planeswalkers you control.
At the beginning of your opponents' end step, they may tap any number of untapped creatures they control with total power 8 or greater. If they do, abandon this scheme.

Chaotic Aether

When you encounter Chaotic Aether, each blank roll of the planar die is a {CHAOS} roll until a player planeswalks away from a plane. (Then planeswalk away from this phenomenon.)

Barrin

Sacrifice a permanent: Return target creature to its owner's hand.

Aplan Mortarium

Byzantium Radiation — At the beginning of your upkeep, put an exposure counter on Aplan Mortarium. Then you lose life equal to the number of exposure counters on it.
Whenever chaos ensues, create two 2/2 black Alien Angel artifact creature tokens with first strike, vigilance, and "Whenever an opponent casts a creature spell, this permanent isn't a creature until end of turn."

Bant

All creatures have exalted. (Whenever a creature attacks alone, it gets +1/+1 until end of turn for each instance of exalted among permanents its controller controls.)
Whenever chaos ensues, put a divinity counter on target green, white, or blue creature. That creature has indestructible for as long as it has a divinity counter on it.

Alora, Cheerful Scout

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, it perpetually gets +1/+1.

Elvish Champion Avatar

You begin the game with a 1/1 green Elf creature token on the battlefield. It has "{T}: Add {G}."

Coal Hill School

Whenever a player casts a historic spell, that player draws a card. (Artifacts, legendaries, and Sagas are historic.)
Whenever chaos ensues, return target historic card from your graveyard to your hand.

Eladamri, Lord of Leaves Avatar

At the beginning of each player's first main phase, that player adds {G}{G}.

Every Dream a Nightmare

When you set this scheme in motion, each opponent discards a card. You draw a card for each land card discarded this way.

Birds of Paradise Avatar

Lands you control have "{T}: Add one mana of any color."

Edge of Malacol

If a creature you control would untap during your untap step, put two +1/+1 counters on it instead.
Whenever chaos ensues, untap each creature you control.

Every Hope Shall Vanish

When you set this scheme in motion, each opponent reveals their hand. Choose a nonland card from each of those hands. Those players discard those cards.

Crovax

Whenever a creature you control deals damage to a creature or player, you gain 1 life.

Ambergris, Agent of Destruction

Haste
Whenever Ambergris, Agent of Destruction attacks, you may discard your hand and draw two cards. If you do, Ambergris deals X damage to each opponent, where X is the number of cards you've discarded this turn.

Erhnam Djinn Avatar

Whenever you cast a creature spell, create a 1/1 green Saproling creature token.

Enigma Sphinx Avatar

Whenever you cast a colored artifact spell for the first time each turn, search your library for a colored artifact card chosen at random whose mana value is less than that spell's mana value. You may play that card without paying its mana cost. If you don't, put that card on the bottom of your library.

Celestine Reef

Creatures without flying or islandwalk can't attack.
Whenever chaos ensues, until a player planeswalks, you can't lose the game and your opponents can't win the game.

Ambergris, Agent of Progress

Haste
Whenever Ambergris, Agent of Progress attacks, you may discard your hand and draw three cards.

Dance of Flame

Whenever a Reveler attacks, Dance of Flame deals 1 damage to each player.

Choose Your Champion

When you set this scheme in motion, target opponent chooses a player. Until your next turn, only you and the chosen player can cast spells and attack with creatures.

Embrace My Diabolical Vision

When you set this scheme in motion, each player shuffles their hand and graveyard into their library. You draw seven cards, then each other player draws four cards.

Because I Have Willed It

(An ongoing scheme remains face up until it's abandoned.)
Spells you cast cost {1} less to cast.
At the beginning of your opponents' end step, if they cast four or more spells this turn, abandon this scheme.

Dakkon Blackblade Avatar

You may play any colored card from your hand as a copy of a basic land card chosen at random that can produce mana of one of the card's colors.

Cliffside Market

When you planeswalk to Cliffside Market and at the beginning of your upkeep, you may exchange life totals with target player.
Whenever chaos ensues, exchange control of two target permanents that share a card type.

Agyrem

Whenever a white creature dies, return it to the battlefield under its owner's control at the beginning of the next end step.
Whenever a nonwhite creature dies, return it to its owner's hand at the beginning of the next end step.
Whenever chaos ensues, creatures can't attack you until a player planeswalks.

Akroma, Angel of Wrath Avatar

Whenever a creature you control enters, it gains two abilities chosen at random from among flying, first strike, trample, haste, protection from black, protection from red, and vigilance.

Altar of Mogis

At the beginning of the Horde's first main phase, reveal an additional card from the top of the Horde's library. The Horde casts that card.
Hero's Reward — When Altar of Mogis is put into a graveyard from anywhere, the Horde sacrifices two Minotaurs.

Ashling, the Extinguisher Avatar

{5}: Destroy all nonland permanents. Activate only once and only during your turn.

Chronatog Avatar

You have no maximum hand size.
{0}: Draw three cards. You skip your next turn. Activate only once each turn.

Distract the Hydra

Each player may sacrifice a creature. Each player who sacrificed a creature this way chooses a Head and taps it. Each player who didn't sacrifice a creature loses 3 life.

Ambergris, Agent of Balance

Haste
Whenever Ambergris, Agent of Balance attacks, you may discard your hand and draw two cards. When you do, put X +1/+1 counters on another target creature you control, where X is the number of cards you've discarded this turn.

Ambergris, Agent of Law

Haste
Whenever Ambergris, Agent of Law attacks, you may discard your hand and draw two cards. If you do, other creatures you control get +X/+X until end of turn, where X is the number of cards you've discarded this turn.

Alora, Cheerful Mastermind

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, create a 1/1 white Soldier creature token.

Arcbound Overseer Avatar

At the beginning of your upkeep, you may put a +1/+1 counter on target creature you control.
At the beginning of your upkeep, you may put a charge counter on target permanent you control.

Ashnod

Whenever a creature deals damage to you, destroy it.

Akoum

Players may cast enchantment spells as though they had flash.
Whenever chaos ensues, destroy target creature that isn't enchanted.

Dance, Pathetic Marionette

When you set this scheme in motion, each opponent reveals cards from the top of their library until they reveal a creature card. Choose one of the revealed creature cards and put it onto the battlefield under your control. Put all other cards revealed this way into their owners' graveyards.

Antarctic Research Base

When you planeswalk to Antarctic Research Base and at the beginning of your upkeep, investigate.
Whenever chaos ensues, put X +1/+1 counters on target creature you control, where X is the number of artifacts you control. It becomes a Plant in addition to its other types.

Aretopolis

When you planeswalk to Aretopolis and at the beginning of your upkeep, put a scroll counter on Aretopolis, then you gain life equal to the number of scroll counters on it.
When Aretopolis has ten or more scroll counters on it, planeswalk.
Whenever chaos ensues, put a scroll counter on Aretopolis, then draw cards equal to the number of scroll counters on it.

Caught in a Parallel Universe

When you encounter Caught in a Parallel Universe, each player chooses a creature controlled by the player to their left. Each player creates a token that's a copy of the creature they chose, except it has menace. (Then planeswalk away from this phenomenon.)

Esper

Artifact spells cost {1} less to cast.
Whenever chaos ensues, creatures you control that are white, blue, and/or black become artifacts in addition to their other types until end of turn. Then each artifact creature you control gains vigilance, menace, and lifelink until end of turn.

Dauntless Escort Avatar

Creatures you control have exalted. (Whenever a creature you control attacks alone, it gets +1/+1 until end of turn for each instance of exalted among permanents you control.)

A Display of My Dark Power

When you set this scheme in motion, until your next turn, whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Bosh, Iron Golem Avatar

{X}, Sacrifice an artifact with mana value X: Bosh, Iron Golem Avatar deals X damage to any target.

Ertai

Creatures you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Diamond Faerie Avatar

{S}: Target creature you control gets +1/+1 until end of turn.

Bowie Base One

At the beginning of your end step, goad target creature controlled by the player to your left. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)
Whenever chaos ensues, target creature gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

Amy's Home

When you planeswalk to Amy's Home and at the beginning of your upkeep, you may exile a nonland card from your hand with a number of time counters on it equal to its mana value. If it doesn't have suspend, it gains suspend.
Whenever chaos ensues, time travel. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter.)

Academy at Tolaria West

At the beginning of your end step, if you have no cards in hand, draw seven cards.
Whenever chaos ensues, discard your hand.

Behold My Grandeur

When you set this scheme in motion, add {U}{B}{R}.
When you set this scheme in motion, if you control six or more lands, you may search your library for a card with mana value 6 or greater, reveal it, put it into your hand, then shuffle.

1996 World Champion

Cannot be the target of spells or effects. World Champion has power and toughness equal to the life total of target opponent.
{0}: Discard your hand to search your library for 1996 World Champion and reveal it to all players. Shuffle your library and put 1996 World Champion on top of it. Use this ability only at the beginning of your upkeep, and only if 1996 World Champion is in your library.

Cloak of the Philosopher

Equipped creature gets +1/+1.
{2}: Untap equipped creature.
Equip {2}

Axe of the Warmonger

Equipped creature gets +2/+1 and has haste.
Equip {2}

Behold the Power of Destruction

When you set this scheme in motion, destroy all nonland permanents target opponent controls.

Drench the Soil in Their Blood

When you set this scheme in motion, after this main phase, there is an additional combat phase followed by an additional main phase. Creatures you control gain vigilance until end of turn.

City of the Daleks

Whenever you attack, target opponent loses X life, where X is the number of artifacts you control.
Whenever chaos ensues, for each opponent, you create a 3/3 black Dalek artifact creature token with menace that attacks that opponent this turn if able. Those tokens gain haste. Sacrifice them at the beginning of the next end step.

Eloren Wilds

Whenever a player taps a permanent for mana, that player adds one mana of any type that permanent produced.
Whenever chaos ensues, target player can't cast spells until a player planeswalks.

All in Good Time

When you set this scheme in motion, take an extra turn after this one. Schemes can't be set in motion that turn.

Dalek Intensive Care

When you planeswalk to Dalek Intensive Care and at the beginning of your upkeep, exile a non-Dalek creature you control. If you do, create a 3/3 black Dalek artifact creature token with menace. It gains haste until end of turn.
Whenever chaos ensues, target Dalek you control deals damage equal to its power to target creature you don't control.

Ambergris, Agent of Tyranny

Haste
Whenever Ambergris, Agent of Tyranny attacks, you may discard your hand and draw two cards. When you do, target creature an opponent controls gets -X/-X until end of turn, where X is the number of cards you've discarded this turn.

Bloodhill Bastion

Whenever a creature enters, it gains double strike and haste until end of turn.
Whenever chaos ensues, exile target nontoken creature you control, then return it to the battlefield under your control.

Delight in the Hunt

When you set this scheme in motion, create a 3/3 black Horror creature token and prevent all damage that would be dealt to creatures you control this turn.

Alora, Cheerful Swashbuckler

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, create a Treasure token.

All Shall Smolder in My Wake

When you set this scheme in motion, destroy up to one target artifact, up to one target enchantment, and up to one target nonbasic land.

Approach My Molten Realm

When you set this scheme in motion, until your next turn, if a source would deal damage, it deals double that damage instead.

Alora, Cheerful Thief

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, a creature of your choice an opponent controls perpetually gets -1/-0.

Astral Arena

No more than one creature can attack each combat.
No more than one creature can block each combat.
Whenever chaos ensues, Astral Arena deals 2 damage to each creature.

Eight-and-a-Half-Tails Avatar

{1}: Until end of turn, target permanent you control gains protection from a color chosen at random from colors it doesn't have protection from.

Eladamri

{0}: The next 1 damage that would be dealt to target creature you control is dealt to you instead.

Braids, Conjurer Adept Avatar

{2}: Each player may put a land card from their hand onto the battlefield tapped.
{3}: Each player may put a noncreature artifact card from their hand onto the battlefield.
{4}: Each player may put a creature card from their hand onto the battlefield. Activate only as a sorcery.

Bow of the Hunter

Equipped creature has "{T}: This creature deals 2 damage to any target."
Equip {2}

Ashling the Pilgrim Avatar

{2}: Ashling the Pilgrim Avatar deals 1 damage to each creature and each player.

Choose Your Demise

When you set this scheme in motion, look at the top four cards of your library and separate them into a face-down pile and a face-up pile. An opponent chooses one of those piles. Put the cards in that pile into your hand and the rest on the bottom of your library in any order.

Disorienting Glower

Players can't cast spells until the Hydra's next turn.

A Reckoning Approaches

When you set this scheme in motion, look at the top six cards of your library. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in any order.

Dance of Panic

As long as five or more Revelers are on the battlefield, all Revelers have haste and attack each turn if able.

Consuming Rage

Whenever a Minotaur attacks this turn, it gets +2/+0 until end of turn. Destroy that creature at end of combat.

Enigma Ridges

When you planeswalk to Enigma Ridges, each player who controls fewer lands than the player who controls the most lands searches their library for a number of basic land cards less than or equal to the difference, reveals them, puts them into their hand, then shuffles.
Whenever chaos ensues, draw a card, then you may put a land card from your hand onto the battlefield.

Descend on the Prey

Whenever a Minotaur attacks this turn, it gains first strike until end of turn and must be blocked this turn if able.

Arcanis, the Omnipotent Avatar

{X}, Return a creature you control with mana value X to its owner's hand: Draw a number of cards chosen at random between 0 and X. X can't be 0.

Besieged Viking Village

All creatures have "Boast — {1}: Put a +1/+1 counter on this creature." (Activate only if that creature attacked this turn and only once each turn.)
Whenever chaos ensues, put an indestructible counter on target creature you control that attacked this turn.

Etched Oracle Avatar

You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast.

Alora, Cheerful Assassin

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, each opponent loses 2 life.