Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control.
{1}{U}
Contentious Plan
Sorcery
Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Draw a card.
{1}{U}
Disdainful Stroke
Instant
Counter target spell with mana value 4 or greater.
{W}{U}
Dovin's Veto
Instant
This spell can't be countered.
Counter target noncreature spell.
{1}{W}{U}
Dovin, Grand Arbiter
Legendary Planeswalker - Dovin
+1: Until end of turn, whenever a creature you control deals combat damage to a player, put a loyalty counter on Dovin, Grand Arbiter.
-1: Create a 1/1 colorless Thopter artifact creature token with flying. You gain 1 life.
-7: Look at the top ten cards of your library. Put three of them into your hand and the rest on the bottom of your library in a random order.
L:
3
{2}{W/U}
Dovin, Hand of Control
Legendary Planeswalker - Dovin
Artifact, instant, and sorcery spells your opponents cast cost {1} more to cast.
-1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.
L:
5
{2}{W}{W}{U}{U}
Dream Trawler
Creature - Sphinx
Flying, lifelink
Whenever you draw a card, Dream Trawler gets +1/+0 until end of turn.
Whenever Dream Trawler attacks, draw a card.
Discard a card: Dream Trawler gains hexproof until end of turn. Tap it.
3 /
5
{X}{R}{R}
Electrodominance
Instant
Electrodominance deals X damage to any target. You may cast a spell with mana value X or less from your hand without paying its mana cost.
{4}{R}{R}
Embercleave
Legendary Artifact - Equipment
Flash
This spell costs {1} less to cast for each attacking creature you control.
When Embercleave enters the battlefield, attach it to target creature you control.
Equipped creature gets +1/+1 and has double strike and trample.
Equip {3}
{U/R}{U/R}{ // }{X}{U}{U}{R}{R}
Expansion // Explosion
Instant // Instant
Copy target instant or sorcery spell with mana value 4 or less. You may choose new targets for the copy.
Explosion deals X damage to any target. Target player draws X cards.
{X}{R}{R}
Finale of Promise
Sorcery
You may cast up to one target instant card and/or up to one target sorcery card from your graveyard each with mana value X or less without paying their mana costs. If a spell cast this way would be put into your graveyard, exile it instead. If X is 10 or more, copy each of those spells twice. You may choose new targets for the copies.
{X}{U}{U}
Finale of Revelation
Sorcery
Draw X cards. If X is 10 or more, instead shuffle your graveyard into your library, draw X cards, untap up to five lands, and you have no maximum hand size for the rest of the game.
Exile Finale of Revelation.
{U}{R}
Firemind's Research
Enchantment
Whenever you cast an instant or sorcery spell, put a charge counter on Firemind's Research.
{1}{U}, Remove two charge counters from Firemind's Research: Draw a card.
{1}{R}, Remove five charge counters from Firemind's Research: It deals 5 damage to any target.
{2}{U}
Flux Channeler
Creature - Human Wizard
Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
2 /
2
--
Hallowed Fountain
Land - Plains Island
({T}: Add {W} or {U}.)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{1}{R}
Heartfire
Instant
As an additional cost to cast this spell, sacrifice a creature or planeswalker.
Heartfire deals 4 damage to any target.
{X}{W}{W}
Heliod's Intervention
Instant
Choose one --
• Destroy X target artifacts and/or enchantments.
• Target player gains twice X life.
{4}{R}{R}
Inescapable Blaze
Instant
This spell can't be countered.
Inescapable Blaze deals 6 damage to any target.
{1}{U}{R}
Ionize
Instant
Counter target spell. Ionize deals 2 damage to that spell's controller.
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Karn's Bastion
Land
{T}: Add {C}.
{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
{1}{U}{R}{W}
Kykar, Wind's Fury
Legendary Creature - Bird Wizard
Flying
Whenever you cast a noncreature spell, create a 1/1 white Spirit creature token with flying.
Sacrifice a Spirit: Add {R}.
3 /
3
{1}{R}
Lava Coil
Sorcery
Lava Coil deals 4 damage to target creature. If that creature would die this turn, exile it instead.
{2}{W}
Mace of the Valiant
Artifact - Equipment
Equipped creature gets +1/+1 for each charge counter on Mace of the Valiant and has vigilance.
Whenever a creature enters the battlefield under your control, put a charge counter on Mace of the Valiant.
Equip {3}
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{1}{U}{U}
Narset, Parter of Veils
Legendary Planeswalker - Narset
Each opponent can't draw more than one card each turn.
-2: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
L:
5
{1}{U}
Negate
Instant
Counter target noncreature spell.
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{2}{R}{R}
Repeated Reverberation
Instant
When you next cast an instant spell, cast a sorcery spell, or activate a loyalty ability this turn, copy that spell or ability twice. You may choose new targets for the copies.
--
Sacred Foundry
Land - Mountain Plains
({T}: Add {R} or {W}.)
As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{1}{U/R}{U/R}
Saheeli, Sublime Artificer
Legendary Planeswalker - Saheeli
Whenever you cast a noncreature spell, create a 1/1 colorless Servo artifact creature token.
-2: Target artifact you control becomes a copy of another target artifact or creature you control until end of turn, except it's an artifact in addition to its other types.
L:
5
{1}{U}{U}
Sinister Sabotage
Instant
Counter target spell.
Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
{3}{W}
Smothering Tithe
Enchantment
Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
--
Steam Vents
Land - Island Mountain
({T}: Add {U} or {R}.)
As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{2}{R}{R}
Storm's Wrath
Sorcery
Storm's Wrath deals 4 damage to each creature and each planeswalker.
{1}{U}
Tale's End
Instant
Counter target activated ability, triggered ability, or legendary spell.
{1}{W}{U}
Teferi, Time Raveler
Legendary Planeswalker - Teferi
Each opponent can cast spells only any time they could cast a sorcery.
+1: Until your next turn, you may cast sorcery spells as though they had flash.
-3: Return up to one target artifact, creature, or enchantment to its owner's hand. Draw a card.
L:
4
--
Temple of Enlightenment
Land
Temple of Enlightenment enters the battlefield tapped.
When Temple of Enlightenment enters the battlefield, scry 1.
{T}: Add {W} or {U}.
--
Temple of Epiphany
Land
Temple of Epiphany enters the battlefield tapped.
When Temple of Epiphany enters the battlefield, scry 1.
{T}: Add {U} or {R}.
--
Temple of Triumph
Land
Temple of Triumph enters the battlefield tapped.
When Temple of Triumph enters the battlefield, scry 1.
{T}: Add {R} or {W}.
{X}{U}{U}
Thassa's Intervention
Instant
Choose one --
• Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order.
• Counter target spell unless its controller pays twice {X}.
{1}{U}{R}
The Royal Scions
Legendary Planeswalker - Will Rowan
+1: Draw a card, then discard a card.
+1: Target creature gets +2/+0 and gains first strike and trample until end of turn.
-8: Draw four cards. When you do, The Royal Scions deals damage to any target equal to the number of cards in your hand.
L:
5
{3}{W}
The Wanderer
Legendary Planeswalker
Prevent all noncombat damage that would be dealt to you and other permanents you control.
-2: Exile target creature with power 4 or greater.
L:
5
{3}{U}{U}
Thryx, the Sudden Storm
Legendary Creature - Elemental Giant
Flash
Flying
Spells you cast with mana value 5 or greater cost {1} less to cast and can't be countered.
4 /
5
{4}{W}
Wanderer's Strike
Sorcery
Exile target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)