Reveal the top card of your library and put that card into your hand. You lose life equal to its mana value. You may repeat this process any number of times.
{4}
Aetherflux Reservoir
Artifact
Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.
Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.
{2}
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
{1}
Altar of the Brood
Artifact
Whenever another permanent enters the battlefield under your control, each opponent mills a card.
{W}
Angel's Grace
Instant
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
You can't lose the game this turn and your opponents can't win the game this turn. Until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead.
{1}{W}{B}
Anguished Unmaking
Instant
Exile target nonland permanent. You lose 3 life.
{1}{U}
Arcane Denial
Instant
Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.
--
Arcane Sanctum
Land
Arcane Sanctum enters the battlefield tapped.
{T}: Add {W}, {U}, or {B}.
{2}
Azorius Signet
Artifact
{1}, {T}: Add {W}{U}.
--
Bojuka Bog
Land
Bojuka Bog enters the battlefield tapped.
When Bojuka Bog enters the battlefield, exile target player's graveyard.
{T}: Add {B}.
{U}
Brainstorm
Instant
Draw three cards, then put two cards from your hand on top of your library in any order.
{1}{B}
Cabal Ritual
Instant
Add {B}{B}{B}.
Threshold -- Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard.
--
Caves of Koilos
Land
{T}: Add {C}.
{T}: Add {W} or {B}. Caves of Koilos deals 1 damage to you.
--
Cephalid Coliseum
Land
{T}: Add {U}. Cephalid Coliseum deals 1 damage to you.
Threshold -- {U}, {T}, Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.
{U}
Chain of Vapor
Instant
Return target nonland permanent to its owner's hand. Then that permanent's controller may sacrifice a land. If the player does, they may copy this spell and may choose a new target for that copy.
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
--
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
--
Concealed Courtyard
Land
Concealed Courtyard enters the battlefield tapped unless you control two or fewer other lands.
{T}: Add {W} or {B}.
{U}{U}
Counterspell
Instant
Counter target spell.
{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.")
{B}
Dark Ritual
Instant
Add {B}{B}{B}.
--
Darkslick Shores
Land
Darkslick Shores enters the battlefield tapped unless you control two or fewer other lands.
{T}: Add {U} or {B}.
{1}{B}
Demonic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{2}
Dimir Signet
Artifact
{1}, {T}: Add {U}{B}.
{1}{U}{U}
Disallow
Instant
Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
{U}
Dispel
Instant
Counter target instant spell.
{1}{U}{U}
Dissipate
Instant
Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
{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.)
{B}{B}{B}
Doomsday
Sorcery
Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.
--
Drowned Catacomb
Land
Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.
{W}
Enlightened Tutor
Instant
Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.
--
Exotic Orchard
Land
{T}: Add one mana of any color that a land an opponent controls could produce.
{3}{W}
Felidar Guardian
Creature - Cat Beast
When Felidar Guardian enters the battlefield, you may exile another target permanent you control, then return that card to the battlefield under its owner's control.
1 /
4
{2}
Fellwar Stone
Artifact
{T}: Add one mana of any color that a land an opponent controls could produce.
{2}{U}{U}
Foil
Instant
You may discard an Island card and another card rather than pay this spell's mana cost.
Counter target spell.
{2}{U}
Forbidden Alchemy
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard.
Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
--
Forbidden Orchard
Land
{T}: Add one mana of any color.
Whenever you tap Forbidden Orchard for mana, target opponent creates a 1/1 colorless Spirit creature token.
{2}{U}
Frantic Search
Instant
Draw two cards, then discard two cards. Untap up to three lands.
{2}
Genesis Chamber
Artifact
Whenever a nontoken creature enters the battlefield, if Genesis Chamber is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.
{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.
--
Glacial Fortress
Land
Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.
--
Godless Shrine
Land - Plains Swamp
({T}: Add {W} or {B}.)
As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
--
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.
{4}
Helm of Obedience
Artifact
{X}, {T}: Target opponent mills a card, then repeats this process until a creature card or X cards have been put into their graveyard this way, whichever comes first. If one or more creature cards were put into that graveyard this way, sacrifice Helm of Obedience and put one of them onto the battlefield under your control. X can't be 0.
{1}{U}
Impulse
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
--
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}.)
--
Isolated Chapel
Land
Isolated Chapel enters the battlefield tapped unless you control a Plains or a Swamp.
{T}: Add {W} or {B}.
{2}{U}
Laboratory Maniac
Creature - Human Wizard
If you would draw a card while your library has no cards in it, you win the game instead.
2 /
2
{2}{B}{B}
Leyline of the Void
Enchantment
If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent's graveyard from anywhere, exile it instead.
{U}{B}
Lim-Dûl's Vault
Instant
Look at the top five cards of your library. As many times as you choose, you may pay 1 life, put those cards on the bottom of your library in any order, then look at the top five cards of your library. Then shuffle and put the last cards you looked at this way on top in any order.
{1}{U}
Mana Leak
Instant
Counter target spell unless its controller pays {3}.
{U/P}
Mental Misstep
Instant
({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.
{1}{U}
Miscalculation
Instant
Counter target spell unless its controller pays {2}.
Cycling {2} ({2}, Discard this card: Draw a card.)
{U}
Mystic Remora
Enchantment
Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.
{U}
Mystical Tutor
Instant
Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.
{B}{B}{B}
Necropotence
Enchantment
Skip your draw step.
Whenever you discard a card, exile that card from your graveyard.
Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.
{1}{U}
Negate
Instant
Counter target noncreature spell.
{1}{B}
Night's Whisper
Sorcery
You draw two cards and you lose 2 life.
{3}{W}{U}{B}
Oloro, Ageless Ascetic
Legendary Creature - Giant Soldier
At the beginning of your upkeep, you gain 2 life.
Whenever you gain life, you may pay {1}. If you do, draw a card and each opponent loses 1 life.
At the beginning of your upkeep, if Oloro, Ageless Ascetic is in the command zone, you gain 2 life.
4 /
5
{U}
Opt
Instant
Scry 1.
Draw a card.
{2}
Orzhov Signet
Artifact
{1}, {T}: Add {W}{B}.
{W}
Path to Exile
Instant
Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{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.
--
Prairie Stream
Land - Plains Island
({T}: Add {W} or {U}.)
Prairie Stream enters the battlefield tapped unless you control two or more basic lands.
{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}{U}
Remand
Instant
Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.
{1}{W}
Rest in Peace
Enchantment
When Rest in Peace enters the battlefield, exile all graveyards.
If a card or token would be put into a graveyard from anywhere, exile it instead.
--
Seachrome Coast
Land
Seachrome Coast enters the battlefield tapped unless you control two or fewer other lands.
{T}: Add {W} or {U}.
{1}
Sensei's Divining Top
Artifact
{1}: Look at the top three cards of your library, then put them back in any order.
{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.
{U}
Serum Visions
Sorcery
Draw a card. Scry 2.
{W}
Silence
Instant
Your opponents can't cast spells this turn.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{U}
Spell Snare
Instant
Counter target spell with mana value 2.
{2}{U}
Spellseeker
Creature - Human Wizard
When Spellseeker enters the battlefield, you may search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.
1 /
1
--
Sunken Hollow
Land - Island Swamp
({T}: Add {U} or {B}.)
Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{U}
Swan Song
Instant
Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
{2}
Talisman of Dominance
Artifact
{T}: Add {C}.
{T}: Add {U} or {B}. Talisman of Dominance deals 1 damage to you.
{2}
Talisman of Progress
Artifact
{T}: Add {C}.
{T}: Add {W} or {U}. Talisman of Progress deals 1 damage to you.
--
Tarnished Citadel
Land
{T}: Add {C}.
{T}: Add one mana of any color. Tarnished Citadel deals 3 damage to you.
{2}{W}
Teferi's Protection
Instant
Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)
Exile Teferi's Protection.
--
Underground River
Land
{T}: Add {C}.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.
{2}{W}{B}
Utter End
Instant
Exile target nonland permanent.
{B}
Vampiric Tutor
Instant
Search your library for a card, then shuffle and put that card on top. You lose 2 life.
{1}{W}{B}
Vindicate
Sorcery
Destroy target permanent.
--
Watery Grave
Land - Island Swamp
({T}: Add {U} or {B}.)
As Watery Grave enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.