(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.

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

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

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

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

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

(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.

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.

(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.

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

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.

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.

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.

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

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.

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

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

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.

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.

(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.

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

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

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.

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

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.

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.

(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.

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

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.

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.

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

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

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.

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.

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

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.