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.

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.

Denizen of the Deep

When Denizen of the Deep enters, return each other creature you control to its owner’s hand.

Volcanic Fallout

This spell can’t be countered.
Volcanic Fallout deals 2 damage to each creature and each player.

Stronghold Furnace

If a source would deal damage to a permanent or player, it deals double that damage instead.
Whenever chaos ensues, Stronghold Furnace deals 1 damage to any target.

Blightning

Blightning deals 3 damage to target player or planeswalker. That player or that planeswalker’s controller discards two cards.

Waves of Aggression

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Merrow Levitator

: Target creature gains flying until end of turn.
Whenever you cast a blue spell, you may untap Merrow Levitator.

Illuminated Folio

, , Reveal two cards from your hand that share a color: Draw a card.

Nurturer Initiate

Whenever a player casts a green spell, you may pay . If you do, target creature gets +1/+1 until end of turn.

Traitor’s Roar

Tap target untapped creature. It deals damage equal to its power to its controller.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Mirrorweave

Each other creature becomes a copy of target nonlegendary creature until end of turn.

Squeaking Pie Grubfellows

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Squeaking Pie Grubfellows, you may reveal it. If you do, each opponent discards a card.

Reins of the Vinesteed

Enchant creature
Enchanted creature gets +2/+2.
When enchanted creature dies, you may return Reins of the Vinesteed from your graveyard to the battlefield attached to a creature that shares a creature type with that creature.

Pulling Teeth

Clash with an opponent. If you win, target player discards two cards. Otherwise, that player discards a card. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Runed Stalactite

Equipped creature gets +1/+1 and is every creature type.
Equip

Colfenor’s Urn

Whenever a creature with toughness 4 or greater is put into your graveyard from the battlefield, you may exile it.
At the beginning of the end step, if three or more cards have been exiled with Colfenor’s Urn, sacrifice it. If you do, return those cards to the battlefield under their owner’s control.

Wings of Velis Vel

Changeling (This card is every creature type.)
Until end of turn, target creature has base power and toughness 4/4, gains all creature types, and gains flying.

Knucklebone Witch

Whenever a Goblin you control is put into a graveyard from the battlefield, you may put a +1/+1 counter on Knucklebone Witch.