As an additional cost to cast this spell, sacrifice a blue permanent.
Counter target spell.
{1}
Altar of the Brood
Artifact
Whenever another permanent enters the battlefield under your control, each opponent mills a card.
{U}
Apathy
Enchantment - Aura
Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may discard a card at random. If the player does, untap that creature.
{X}{R}
Banefire
Sorcery
Banefire deals X damage to any target.
If X is 5 or more, this spell can't be countered and the damage can't be prevented.
{X}{R}
Blaze
Sorcery
Blaze deals X damage to any target.
{R}
Blazing Salvo
Instant
Blazing Salvo deals 3 damage to target creature unless that creature's controller has Blazing Salvo deal 5 damage to them.
{U/R}
Blistercoil Weird
Creature - Weird
Whenever you cast an instant or sorcery spell, Blistercoil Weird gets +1/+1 until end of turn. Untap it.
1 /
1
{X}{X}{R}
Bonfire of the Damned
Sorcery
Bonfire of the Damned deals X damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.
Miracle {X}{R} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)
{X}{R}
Burn from Within
Sorcery
Burn from Within deals X damage to any target. If a creature is dealt damage this way, it loses indestructible until end of turn. If that creature would die this turn, exile it instead.
{R}
Burst Lightning
Instant
Kicker {4} (You may pay an additional {4} as you cast this spell.)
Burst Lightning deals 2 damage to any target. If this spell was kicked, it deals 4 damage instead.
{U}
Cathartic Adept
Creature - Human Wizard
{T}: Target player mills a card.
1 /
1
{1}
Codex Shredder
Artifact
{T}: Target player mills a card. (They put the top card of their library into their graveyard.)
{5}, {T}, Sacrifice Codex Shredder: Return target card from your graveyard to your hand.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{X}{X}{R}
Conflagrate
Sorcery
Conflagrate deals X damage divided as you choose among any number of targets.
Flashback--{R}{R}, Discard X cards. (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{1}
Consulate Dreadnought
Artifact - Vehicle
Crew 6 (Tap any number of creatures you control with total power 6 or more: This Vehicle becomes an artifact creature until end of turn.)
7 /
11
{U}
Cosi's Trickster
Creature - Merfolk Wizard
Whenever an opponent shuffles their library, you may put a +1/+1 counter on Cosi's Trickster.
1 /
1
{X}{R}
Crater's Claws
Sorcery
Crater's Claws deals X damage to any target.
Ferocious -- Crater's Claws deals X plus 2 damage instead if you control a creature with power 4 or greater.
{R}
Curse of Opulence
Enchantment - Aura Curse
Enchant player
Whenever enchanted player is attacked, create a Gold token. Each opponent attacking that player does the same. (A Gold token is an artifact with "Sacrifice this artifact: Add one mana of any color.")
{U}
Delver of Secrets
Creature - Human Wizard
At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform Delver of Secrets.
1 /
1
--
Insectile Aberration
Creature - Human Insect
Flying
1 /
1
{X}{R}
Demonfire
Sorcery
Demonfire deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead.
Hellbent -- If you have no cards in hand, this spell can't be countered and the damage can't be prevented.
{X}{R}
Disintegrate
Sorcery
Disintegrate deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.
{U}
Divert
Instant
Change the target of target spell with a single target unless that spell's controller pays {2}.
{U}
Dream Twist
Instant
Target player mills three cards.
Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{U}
Drowner Initiate
Creature - Merfolk Wizard
Whenever a player casts a blue spell, you may pay {1}. If you do, target player mills two cards.
1 /
1
{U}
Extract
Sorcery
Search target player's library for a card and exile it. Then that player shuffles.
{1}
Feldon's Cane
Artifact
{T}, Exile Feldon's Cane: Shuffle your graveyard into your library.
{X}{R}
Fireball
Sorcery
This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.
{R}
Firebolt
Sorcery
Firebolt deals 2 damage to any target.
Flashback {4}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{R}
Firestorm
Instant
As an additional cost to cast this spell, discard X cards.
Firestorm deals X damage to each of X targets.
{R}
Flame Jab
Sorcery
Flame Jab deals 1 damage to any target.
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)
{U}
Force Spike
Instant
Counter target spell unless its controller pays {1}.
{1}
Ghoulcaller's Bell
Artifact
{T}: Each player mills a card.
{U}
Gigadrowse
Instant
Replicate {U} (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)
Tap target permanent.
{U/P}
Gitaxian Probe
Sorcery
({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.
{R}
Goblin Arsonist
Creature - Goblin Shaman
When Goblin Arsonist dies, you may have it deal 1 damage to any target.
1 /
1
{R}
Goblin Fireslinger
Creature - Goblin Warrior
{T}: Goblin Fireslinger deals 1 damage to target player or planeswalker.
1 /
1
{R}
Goblin Grenade
Sorcery
As an additional cost to cast this spell, sacrifice a Goblin.
Goblin Grenade deals 5 damage to any target.
{1}
Grindstone
Artifact
{3}, {T}: Target player mills two cards. If two cards that share a color were milled this way, repeat this process.
{U}
Hedron Crab
Creature - Crab
Landfall -- Whenever a land enters the battlefield under your control, target player mills three cards.
0 /
2
{U}
High Tide
Instant
Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.
{X}{U}
Increasing Confusion
Sorcery
Target player mills X cards. If this spell was cast from a graveyard, that player mills twice that many cards instead.
Flashback {X}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
--
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}.)
--
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}.)
--
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 Cluestone
Artifact
{T}: Add {U} or {R}.
{U}{R}, {T}, Sacrifice Izzet Cluestone: Draw a card.
--
Izzet Guildgate
Land - Gate
Izzet Guildgate enters the battlefield tapped.
{T}: Add {U} or {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}.
{U}
Jace's Phantasm
Creature - Illusion
Flying
Jace's Phantasm gets +4/+4 as long as an opponent has ten or more cards in their graveyard.
1 /
1
{1}{U}{R}
Jori En, Ruin Diver
Legendary Creature - Merfolk Wizard
Whenever you cast your second spell each turn, draw a card.
2 /
3
{U}
Kraken Hatchling
Creature - Kraken
0 /
4
{1}
Library of Leng
Artifact
You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.
{R}
Lightning Bolt
Instant
Lightning Bolt deals 3 damage to any target.
{U}
Mizzium Skin
Instant
Target creature you control gets +0/+1 and gains hexproof until end of turn.
Overload {1}{U} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")
--
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}.)
--
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}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{U}
Obsessive Search
Instant
Draw a card.
Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
--
Opal Palace
Land
{T}: Add {C}.
{1}, {T}: Add one mana of any color in your commander's color identity. If you spend this mana to cast your commander, it enters the battlefield with a number of additional +1/+1 counters on it equal to the number of times it's been cast from the command zone this game.
{U}
Outwit
Instant
Counter target spell that targets a player.
--
Path of Ancestry
Land
Path of Ancestry enters the battlefield tapped.
{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{U}
Personal Tutor
Sorcery
Search your library for a sorcery card, reveal it, then shuffle and put that card on top.
{U}
Portent
Sorcery
Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle.
Draw a card at the beginning of the next turn's upkeep.
{1}
Profane Memento
Artifact
Whenever a creature card is put into an opponent's graveyard from anywhere, you gain 1 life.
{U}
Quest for Ancient Secrets
Enchantment
Whenever a card is put into your graveyard from anywhere, you may put a quest counter on Quest for Ancient Secrets.
Remove five quest counters from Quest for Ancient Secrets and sacrifice it: Target player shuffles their graveyard into their library.
{U}
Ray of Erasure
Instant
Target player mills a card.
Draw a card at the beginning of the next turn's upkeep.
{1}
Shriekhorn
Artifact
Shriekhorn enters the battlefield with three charge counters on it.
{T}, Remove a charge counter from Shriekhorn: Target player mills two cards.
{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.