If X is 5 or more, this spell can't be countered and the damage can't be prevented.
{3}{U}{U}
Baral's Expertise
Sorcery
Return up to three target artifacts and/or creatures to their owners' hands.
You may cast a spell with mana value 4 or less from your hand without paying its mana cost.
{1}{U}
Baral, Chief of Compliance
Legendary Creature - Human Wizard
Instant and sorcery spells you cast cost {1} less to cast.
Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.
1 /
3
{8}{R}
Blasphemous Act
Sorcery
This spell costs {1} less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.
{U}
Brainstorm
Instant
Draw three cards, then put two cards from your hand on top of your library in any order.
{3}
Burnished Hart
Artifact Creature - Elk
{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
2 /
2
--
Cascade Bluffs
Land
{T}: Add {C}.
{U/R}, {T}: Add {U}{U}, {U}{R}, or {R}{R}.
{5}{R}
Charmbreaker Devils
Creature - Devil
At the beginning of your upkeep, return an instant or sorcery card at random from your graveyard to your hand.
Whenever you cast an instant or sorcery spell, Charmbreaker Devils gets +4/+0 until end of turn.
4 /
4
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
{X}{R}{R}
Comet Storm
Instant
Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.)
Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{2}{U}
Copy Enchantment
Enchantment
You may have Copy Enchantment enter the battlefield as a copy of any enchantment on the battlefield.
{U}{U}
Counterspell
Instant
Counter target spell.
{3}{R}{R}
Curse of Bloodletting
Enchantment - Aura Curse
Enchant player
If a source would deal damage to enchanted player, it deals double that damage to that player instead.
{1}{U}
Cyclonic Rift
Instant
Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{X}{R}
Devil's Play
Sorcery
Devil's Play deals X damage to any target.
Flashback {X}{R}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{3}{R}{R}
Dictate of the Twin Gods
Enchantment
Flash
If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.
{1}{U}{U}
Disallow
Instant
Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
{1}{U}{U}
Dissolve
Instant
Counter target spell. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
--
Dormant Volcano
Land
Dormant Volcano enters the battlefield tapped.
When Dormant Volcano enters the battlefield, sacrifice it unless you return an untapped Mountain you control to its owner's hand.
{T}: Add {C}{R}.
{1}{R}{R}
Dualcaster Mage
Creature - Human Wizard
Flash
When Dualcaster Mage enters the battlefield, copy target instant or sorcery spell. You may choose new targets for the copy.
2 /
2
{1}{U}{U}
Echo Mage
Creature - Human Wizard
Level up {1}{U} ({1}{U}: Put a level counter on this. Level up only as a sorcery.)
LEVEL 2-3
2/4
{U}{U}, {T}: Copy target instant or sorcery spell. You may choose new targets for the copy.
LEVEL 4+
2/5
{U}{U}, {T}: Copy target instant or sorcery spell twice. You may choose new targets for the copies.
2 /
3
--
Emergence Zone
Land
{T}: Add {C}.
{1}, {T}, Sacrifice Emergence Zone: You may cast spells this turn as though they had flash.
{2}{U}
Estrid's Invocation
Enchantment
You may have Estrid's Invocation enter the battlefield as a copy of an enchantment you control, except it has "At the beginning of your upkeep, you may exile this enchantment. If you do, return it to the battlefield under its owner's control."
{4}{R}{R}
Etali, Primal Storm
Legendary Creature - Elder Dinosaur
Whenever Etali, Primal Storm attacks, exile the top card of each player's library, then you may cast any number of spells from among those cards without paying their mana costs.
6 /
6
--
Evolving Wilds
Land
{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{2}{U}
Fabricate
Sorcery
Search your library for an artifact card, reveal it, put it into your hand, then shuffle.
{X}{R}{R}
Fault Line
Instant
Fault Line deals X damage to each creature without flying and each player.
{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.
{1}{R}{R}{R}
Furnace of Rath
Enchantment
If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.
{3}{R}{R}
Galvanoth
Creature - Beast
At the beginning of your upkeep, you may look at the top card of your library. You may cast it without paying its mana cost if it's an instant or sorcery spell.
3 /
3
{5}
Gilded Lotus
Artifact
{T}: Add three mana of any one color.
{2}{U}{U}
God-Eternal Kefnet
Legendary Creature - Zombie God
Flying
You may reveal the first card you draw each turn as you draw it. Whenever you reveal an instant or sorcery card this way, copy that card and you may cast the copy. That copy costs {2} less to cast.
When God-Eternal Kefnet dies or is put into exile from the battlefield, you may put it into its owner's library third from the top.
4 /
5
--
Great Furnace
Artifact Land
{T}: Add {R}.
--
Halimar Depths
Land
Halimar Depths enters the battlefield tapped.
When Halimar Depths enters the battlefield, look at the top three cards of your library, then put them back in any order.
{T}: Add {U}.
{R}{R}
Increasing Vengeance
Instant
Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies.
Flashback {3}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{2}{R}{ // }{2}{R}
Insult // Injury
Sorcery // Sorcery
Damage can't be prevented this turn. If a source you control would deal damage this turn, it deals double that damage instead.
Aftermath (Cast this spell only from your graveyard. Then exile it.)
Injury deals 2 damage to target creature and 2 damage to target player or planeswalker.
--
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}.)
--
Izzet Boilerworks
Land
Izzet Boilerworks enters the battlefield tapped.
When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand.
{T}: Add {U}{R}.
{3}
Izzet Keyrune
Artifact
{T}: Add {U} or {R}.
{U}{R}: Until end of turn, Izzet Keyrune becomes a 2/1 blue and red Elemental artifact creature.
Whenever Izzet Keyrune deals combat damage to a player, you may draw a card. If you do, discard a card.
{2}
Izzet Signet
Artifact
{1}, {T}: Add {U}{R}.
{3}{U}{R}
Keranos, God of Storms
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to blue and red is less than seven, Keranos isn't a creature.
Reveal the first card you draw on each of your turns. Whenever you reveal a land card this way, draw a card. Whenever you reveal a nonland card this way, Keranos deals 3 damage to any target.
6 /
5
--
Mage-Ring Network
Land
{T}: Add {C}.
{1}, {T}: Put a storage counter on Mage-Ring Network.
{T}, Remove any number of storage counters from Mage-Ring Network: Add {C} for each storage counter removed this way.
{4}{U}{R}
Melek, Izzet Paragon
Legendary Creature - Weird Wizard
Play with the top card of your library revealed.
You may cast instant and sorcery spells from the top of your library.
Whenever you cast an instant or sorcery spell from your library, copy it. You may choose new targets for the copy.
2 /
4
{3}
Mirage Mirror
Artifact
{2}: Mirage Mirror becomes a copy of target artifact, creature, enchantment, or land until end of turn.
--
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}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Myriad Landscape
Land
Myriad Landscape enters the battlefield tapped.
{T}: Add {C}.
{2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.
{U}
Mystical Tutor
Instant
Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.
{U}{U}
Narset's Reversal
Instant
Copy target instant or sorcery spell, then return it to its owner's hand. You may choose new targets for the copy.
{2}{R}{R}
Neheb, Dreadhorde Champion
Legendary Creature - Zombie Minotaur Warrior
Trample
Whenever Neheb, Dreadhorde Champion deals combat damage to a player or planeswalker, you may discard any number of cards. If you do, draw that many cards and add that much {R}. Until end of turn, you don't lose this mana as steps and phases end.
5 /
4
{2}{U}{U}{R}{R}
Niv-Mizzet, Dracogenius
Legendary Creature - Dragon Wizard
Flying
Whenever Niv-Mizzet, Dracogenius deals damage to a player, you may draw a card.
{U}{R}: Niv-Mizzet, Dracogenius deals 1 damage to any target.
5 /
5
{U}{U}{U}{R}{R}{R}
Niv-Mizzet, Parun
Legendary Creature - Dragon Wizard
This spell can't be countered.
Flying
Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target.
Whenever a player casts an instant or sorcery spell, you draw a card.
5 /
5
{2}{U}{U}{R}{R}
Niv-Mizzet, the Firemind
Legendary Creature - Dragon Wizard
Flying
Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target.
{T}: Draw a card.
4 /
4
{5}
Paradox Engine
Legendary Artifact
Whenever you cast a spell, untap all nonland permanents you control.
{7}
Platinum Angel
Artifact Creature - Angel
Flying
You can't lose the game and your opponents can't win the game.
4 /
4
{U}
Ponder
Sorcery
Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.
{U}
Pongify
Instant
Destroy target creature. It can't be regenerated. Its controller creates a 3/3 green Ape creature token.
{U}
Preordain
Sorcery
Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{1}{R}
Price of Progress
Instant
Price of Progress deals damage to each player equal to twice the number of nonbasic lands that player controls.
{4}
Primal Amulet
Artifact
Instant and sorcery spells you cast cost {1} less to cast.
Whenever you cast an instant or sorcery spell, put a charge counter on Primal Amulet. Then if there are four or more charge counters on it, you may remove those counters and transform it.
--
Primal Wellspring
Land
(Transforms from Primal Amulet.)
{T}: Add one mana of any color. When that mana is spent to cast an instant or sorcery spell, copy that spell and you may choose new targets for the copy.
{2}{U}{R}
Ral, Storm Conduit
Legendary Planeswalker - Ral
Whenever you cast or copy an instant or sorcery spell, Ral, Storm Conduit deals 1 damage to target opponent or planeswalker.
+2: Scry 1.
-2: When you cast your next instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.
L:
4
{1}{R}{R}
Reiterate
Instant
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Copy target instant or sorcery spell. You may choose new targets for the copy.
--
Reliquary Tower
Land
You have no maximum hand size.
{T}: Add {C}.
{U}{U}
Reset
Instant
Cast this spell only during an opponent's turn after their upkeep step.
Untap all lands you control.
{2}{U}
Rhystic Study
Enchantment
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
{X}{R}
Rolling Earthquake
Sorcery
Rolling Earthquake deals X damage to each creature without horsemanship and each player.
--
Scorched Ruins
Land
If Scorched Ruins would enter the battlefield, sacrifice two untapped lands instead. If you do, put Scorched Ruins onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add {C}{C}{C}{C}.
{6}{R}
Searing Flesh
Sorcery
Searing Flesh deals 7 damage to target opponent or planeswalker.
{8}{R}
Searing Wind
Instant
Searing Wind deals 10 damage to any target.
--
Seat of the Synod
Artifact Land
{T}: Add {U}.
--
Skyline Cascade
Land
Skyline Cascade enters the battlefield tapped.
When Skyline Cascade enters the battlefield, target creature an opponent controls doesn't untap during its controller's next untap step.
{T}: Add {U}.
{1}{R}
Smash to Smithereens
Instant
Destroy target artifact. Smash to Smithereens deals 3 damage to that artifact's controller.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{4}
Solemn Simulacrum
Artifact Creature - Golem
When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
When Solemn Simulacrum dies, you may draw a card.
2 /
2
{3}{U}{U}
Spell Swindle
Instant
Counter target spell. Create X Treasure tokens, where X is that spell's mana value. (They're artifacts 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}{U}{R}
Storm the Vault
Legendary Enchantment
Whenever one or more creatures you control deal combat damage to a player, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
At the beginning of your end step, if you control five or more artifacts, transform Storm the Vault.
--
Vault of Catlacan
Legendary Land
(Transforms from Storm the Vault.)
{T}: Add one mana of any color.
{T}: Add {U} for each artifact you control.
--
Sulfur Falls
Land
Sulfur Falls enters the battlefield tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.
{1}{R}{R}
Sulfuric Vortex
Enchantment
At the beginning of each player's upkeep, Sulfuric Vortex deals 2 damage to that player.
If a player would gain life, that player gains no life instead.
--
Swiftwater Cliffs
Land
Swiftwater Cliffs enters the battlefield tapped.
When Swiftwater Cliffs enters the battlefield, you gain 1 life.
{T}: Add {U} or {R}.
--
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}.
--
Terrain Generator
Land
{T}: Add {C}.
{2}, {T}: You may put a basic land card from your hand onto the battlefield tapped.
{2}
Thaumatic Compass
Artifact
{3}, {T}: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
At the beginning of your end step, if you control seven or more lands, transform Thaumatic Compass.
--
Spires of Orazca
Land
(Transforms from Thaumatic Compass.)
{T}: Add {C}.
{T}: Untap target attacking creature an opponent controls and remove it from combat.
{4}{U}{R}
Thousand-Year Storm
Enchantment
Whenever you cast an instant or sorcery spell, copy it for each other instant and sorcery spell you've cast before it this turn. You may choose new targets for the copies.
{4}{U}{U}
Torrential Gearhulk
Artifact Creature - Construct
Flash
When Torrential Gearhulk enters the battlefield, you may cast target instant card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
5 /
6
{2}{U}{U}
Turnabout
Instant
Choose artifact, creature, or land. Tap all untapped permanents of the chosen type target player controls, or untap all tapped permanents of that type that player controls.
{U}{U}
Twincast
Instant
Copy target instant or sorcery spell. You may choose new targets for the copy.
{1}
Voltaic Key
Artifact
{1}, {T}: Untap target artifact.
{2}{U}
Windfall
Sorcery
Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.