Have

Nature Shields Its Own

(An ongoing scheme remains face up until it's abandoned.)
Whenever a creature attacks and isn't blocked, if you're the defending player, create a 0/1 green Plant creature token that's blocking that creature.
When four or more creatures attack you, abandon this scheme at end of combat.

My Wish Is Your Command

When you set this scheme in motion, each opponent reveals their hand. You may choose a noncreature, nonland card revealed this way and cast it without paying its mana cost.

Look Skyward and Despair

When you set this scheme in motion, create a 5/5 red Dragon creature token with flying.

Getting

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.

My Genius Knows No Bounds

When you set this scheme in motion, you may pay {X}. If you do, you gain X life and draw X cards.

Ignite the Cloneforge!

When you set this scheme in motion, create a token that's a copy of target permanent an opponent controls.

Perhaps You've Met My Cohort

When you set this scheme in motion, search your library for a planeswalker card, put it onto the battlefield, then shuffle your library.

Evil Comes to Fruition

When you set this scheme in motion, create seven 0/1 green Plant creature tokens. If you control ten or more lands, create seven 3/3 green Elemental creature tokens instead.

Only Blood Ends Your Nightmares

When you set this scheme in motion, each opponent sacrifices a creature. Then each opponent who didn't sacrifice a creature discards two cards.

The Fate of the Flammable

When you set this scheme in motion, target opponent chooses self or others. If that player chooses self, this scheme deals 6 damage to that player. If the player chooses others, this scheme deals 3 damage to each of your other opponents.

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.

I Know All, I See All

(An ongoing scheme remains face up until it's abandoned.)
Untap all permanents you control during each opponent's untap step.
At the beginning of each end step, if three or more cards were put into your graveyard this turn from anywhere, abandon this scheme.

Nothing Can Stop Me Now

(An ongoing scheme remains face up until it's abandoned.)
If a source an opponent controls would deal damage to you, prevent 1 of that damage.
At the beginning of each end step, if you've been dealt 5 or more damage this turn, abandon this scheme.

I Call on the Ancient Magics

When you set this scheme in motion, each other player searches their library for a card, reveals it, and puts it into their hand. Then you search your library for two cards and put them into your hand. Each player shuffles.

Your Puny Minds Cannot Fathom

When you set this scheme in motion, draw four cards. You have no maximum hand size until your next turn.

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.

Surrender Your Thoughts

When you set this scheme in motion, target opponent chooses self or others. If that player chooses self, that player discards four cards. If the player chooses others, each of your other opponents discards two cards.

Your Will Is Not Your Own

When you set this scheme in motion, gain control of target creature an opponent controls until end of turn. Untap that creature. It gets +3/+3 and gains trample and haste until end of turn.

Your Fate Is Thrice Sealed

When you set this scheme in motion, reveal the top three cards of your library. Put all land cards revealed this way onto the battlefield and the rest into your hand.

Plots That Span Centuries

When you set this scheme in motion, the next time you would set a scheme in motion, set three schemes in motion instead.

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.

Which of You Burns Brightest?

When you set this scheme in motion, you may pay {X}. If you do, this scheme deals X damage to target opponent or planeswalker and each creature that player or that planeswalker's controller controls.

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.

Into the Earthen Maw

When you set this scheme in motion, exile up to one target creature with flying, up to one target creature without flying, and all cards from up to one target opponent's graveyard.

Every Last Vestige Shall Rot

When you set this scheme in motion, you may pay {X}. If you do, put each nonland permanent target player controls with mana value X or less on the bottom of its owner's library.

Sliver Queen, Brood Mother

{3}: Create a 1/1 colorless Sliver creature token.

Tooth, Claw, and Tail

When you set this scheme in motion, destroy up to three target nonland permanents.

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.

Your Inescapable Doom

(An ongoing scheme remains face up.)
At the beginning of your end step, put a doom counter on this scheme, then this scheme deals damage equal to the number of doom counters on it to the opponent with the highest life total among your opponents. If two or more players are tied for highest life total, you choose one.

Know Naught but Fire

When you set this scheme in motion, it deals damage to each opponent equal to the number of cards in that player's hand.

The Pieces Are Coming Together

When you set this scheme in motion, draw two cards. Artifact spells you cast this turn cost {2} less to cast.

Nature Demands an Offering

When you set this scheme in motion, target opponent chooses a creature you don't control and puts it on top of its owner's library, then repeats this process for an artifact, an enchantment, and a land. Then the owner of each permanent chosen this way shuffles.

The Iron Guardian Stirs

When you set this scheme in motion, create a 4/6 colorless Golem artifact creature token.

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.

Mortal Flesh Is Weak

When you set this scheme in motion, each opponent's life total becomes the lowest life total among your opponents.

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.

Roots of All Evil

When you set this scheme in motion, create five 1/1 green Saproling creature tokens.

Introductions Are in Order

When you set this scheme in motion, choose one —
• Search your library for a creature card, reveal it, put it into your hand, then shuffle.
• You may put a creature card from your hand onto the battlefield.

Feed the Machine

When you set this scheme in motion, target opponent chooses self or others. If that player chooses self, the player sacrifices two creatures. If the player chooses others, each of your other opponents sacrifices a creature.

Realms Befitting My Majesty

When you set this scheme in motion, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Oracle

{0}: Untap target attacking creature you control and remove it from combat.

Imprison This Insolent Wretch

(An ongoing scheme remains face up until it's abandoned.)
When you set this scheme in motion, choose an opponent.
Permanents the chosen player controls don't untap during their untap step.
When the chosen player is attacked or becomes the target of a spell or ability, abandon this scheme.

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.

The Very Soil Shall Shake

(An ongoing scheme remains face up until it's abandoned.)
Creatures you control get +2/+2 and have trample.
When a creature you control dies, abandon this scheme.

I Delight in Your Convulsions

When you set this scheme in motion, each opponent loses 3 life. You gain life equal to the life lost this way.

My Crushing Masterstroke

When you set this scheme in motion, gain control of all nonland permanents your opponents control until end of turn. Untap those permanents. They gain haste until end of turn. Each of them attacks its owner this turn if able.

The Dead Shall Serve

When you set this scheme in motion, for each opponent, put up to one target creature card from that player's graveyard onto the battlefield under your control. Each of those creatures attacks its owner each combat if able.

My Undead Horde Awakens

(An ongoing scheme remains face up until it's abandoned.)
At the beginning of your end step, you may put target creature card from an opponent's graveyard onto the battlefield under your control.
When a creature put onto the battlefield with this scheme dies, abandon this scheme.

May Civilization Collapse

When you set this scheme in motion, target opponent chooses self or others. If that player chooses self, that player sacrifices two lands. If the player chooses others, each of your other opponents sacrifices a land.

I Bask in Your Silent Awe

(An ongoing scheme remains face up until it's abandoned.)
Each opponent can't cast more than one spell each turn.
At the beginning of your upkeep, if no opponent cast a spell since your last turn ended, abandon this scheme.

Behold the Power of Destruction

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

Rotted Ones, Lay Siege

When you set this scheme in motion, for each opponent, create a 2/2 black Zombie creature token that attacks that player each combat if able.