Astral Cornucopia enters the battlefield with X charge counters on it. {T}: Choose a color. Add one mana of that color for each charge counter on Astral Cornucopia.

Coldsteel Heart enters the battlefield tapped. As Coldsteel Heart enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

{T}: Add one mana of any color in your commander's color identity. Sacrifice Commander's Sphere: Draw a card.

{T}: Add {C}{C}{C}. {3}, {T}, Sacrifice Dreamstone Hedron: Draw three cards.

When Elsewhere Flask enters the battlefield, draw a card. Sacrifice Elsewhere Flask: Choose a basic land type. Each land you control becomes that type until end of turn.

You may choose not to untap Entrancing Lyre during your untap step. {X}, {T}: Tap target creature with power X or less. It doesn't untap during its controller's untap step for as long as Entrancing Lyre remains tapped.

When Eye of Vecna enters the battlefield, you draw a card and you lose 2 life. At the beginning of your upkeep, you may pay {2}. If you do, you draw a card and you lose 2 life.

Equipped creature has double strike. (It deals both first-strike and regular combat damage.) Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Colorless creatures you control get +2/+2. Whenever you tap a permanent for {C}, add an additional {C}. Whenever you cast a colorless spell, you gain 2 life.

As Gauntlet of Power enters the battlefield, choose a color. Creatures of the chosen color get +1/+1. Whenever a basic land is tapped for mana of the chosen color, its controller adds an additional one mana of that color.

Spells your opponents cast cost {2} more to cast. At the beginning of your end step, each opponent loses 1 life.

As Hall of Triumph enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+1.

As Heraldic Banner enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+0. {T}: Add one mana of the chosen color.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

{1}, {T}: Tap target artifact, creature, or land.

As Jeweled Torque enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, you may pay {2}. If you do, you gain 2 life.

{T}: Add {C}. {4}, {T}: Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

When Mana Geode enters the battlefield, scry 1. {T}: Add one mana of any color.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) {T}: Add {C}. {T}, Sacrifice Orazca Relic: You gain 3 life and draw a card. Activate only if you have the city's blessing.

{2}, {T}: Tap target artifact or creature.

At the beginning of your end step, put an influence counter on Palantír of Orthanc and scry 2. Then target opponent may have you draw a card. If that player doesn't, you mill X cards, where X is the number of influence counters on Palantír of Orthanc, and that player loses life equal to the total mana value of those cards.

As Paradise Plume enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, you may gain 1 life. {T}: Add one mana of the chosen color.

{5}, {T}, Exile Perilous Vault: Exile all nonland permanents.

{8}, {T}: Search your library for a permanent card, put it onto the battlefield, then shuffle.

When Portal to Phyrexia enters the battlefield, each opponent sacrifices three creatures. At the beginning of your upkeep, put target creature card from a graveyard onto the battlefield under your control. It's a Phyrexian in addition to its other types.

As Prism Ring enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, you gain 1 life.

As Riptide Replicator enters the battlefield, choose a color and a creature type. Riptide Replicator enters the battlefield with X charge counters on it. {4}, {T}: Create an X/X creature token of the chosen color and type, where X is the number of charge counters on Riptide Replicator.

As Sanctuary Blade becomes attached to a creature, choose a color. Equipped creature gets +2/+0 and has protection from the last chosen color. Equip {3}

As Sarpadian Empires, Vol. VII enters the battlefield, choose white Citizen, blue Camarid, black Thrull, red Goblin, or green Saproling. {3}, {T}: Create a 1/1 creature token of the chosen color and type.

As Sol Grail enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

{T}: Add {C}{C}.

Spare Supplies enters the battlefield tapped. When Spare Supplies enters the battlefield, draw a card. {2}, {T}, Sacrifice Spare Supplies: Draw a card.

Sunset Pyramid enters the battlefield with three brick counters on it. {2}, {T}, Remove a brick counter from Sunset Pyramid: Draw a card. {2}, {T}: Scry 1.

Whenever a creature with power equal to its toughness enters the battlefield under your control, you may pay {1}. If you do, draw a card.

Indestructible When The One Ring enters the battlefield, if you cast it, you gain protection from everything until your next turn. At the beginning of your upkeep, you lose 1 life for each burden counter on The One Ring. {T}: Put a burden counter on The One Ring, then draw a card for each burden counter on The One Ring.

As Throne of Eldraine enters the battlefield, choose a color. {T}: Add four mana of the chosen color. Spend this mana only to cast monocolored spells of that color. {3}, {T}: Draw two cards. Spend only mana of the chosen color to activate this ability.

As Volrath's Laboratory enters the battlefield, choose a color and a creature type. {5}, {T}: Create a 2/2 creature token of the chosen color and type.

As Alloy Golem enters the battlefield, choose a color. Alloy Golem is the chosen color. (It's still an artifact.)

Trample, infect, indestructible If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it into its owner's library instead.

Vigilance (Attacking doesn't cause this creature to tap.) As Diamond Knight enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, put a +1/+1 counter on Diamond Knight.

As Diamond Mare enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, you gain 1 life.

If Faceless One is your commander, choose a color before the game begins. Faceless One is the chosen color. Choose a Background (You can have a Background as a second commander.)

Gearsmith Guardian gets +2/+0 as long as you control a blue creature.

Adamant — If at least three mana of the same color was spent to cast this spell, Henge Walker enters the battlefield with a +1/+1 counter on it.

When you cast this spell, draw four cards. Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.) When Kozilek, Butcher of Truth is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.

When you cast this spell, if you have fewer than seven cards in hand, draw cards equal to the difference. Menace Discard a card with mana value X: Counter target spell with mana value X.

As Lurebound Scarecrow enters the battlefield, choose a color. When you control no permanents of the chosen color, sacrifice Lurebound Scarecrow.

({C} represents colorless mana.) When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value.

{T}: Add one mana of any color. {T}: Target creature becomes the color or colors of your choice until end of turn.

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.

Protection from multicolored (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything multicolored.) Whenever a nonbasic land enters the battlefield under an opponent's control, you gain 1 life.

({C} represents colorless mana.) When Thought-Knot Seer enters the battlefield, target opponent reveals their hand. You choose a nonland card from it and exile that card. When Thought-Knot Seer leaves the battlefield, target opponent draws a card.

Flying, vigilance, trample When Triplicate Titan dies, create a 3/3 colorless Golem artifact creature token with flying, a 3/3 colorless Golem artifact creature token with vigilance, and a 3/3 colorless Golem artifact creature token with trample.

When you cast this spell, exile two target permanents. Indestructible Whenever Ulamog, the Ceaseless Hunger attacks, defending player exiles the top twenty cards of their library.

({C} represents colorless mana.) Target creature gets +3/-3 until end of turn.

As an additional cost to cast this spell, reveal a colorless creature card from your hand. Exile target creature if its power is less than or equal to the revealed card's power.

{T}: Add {C}. {1}, {T}: Add one mana of any color. {4}, {T}, Sacrifice Cave of Temptation: Put two +1/+1 counters on target creature. Activate only as a sorcery.

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add {C}. {4}: Put two +1/+1 counters on Crawling Barrens. Then you may have it become a 0/0 Elemental creature until end of turn. It's still a land.

{T}: Add {C}. {1}, {T}, Sacrifice Cryptic Caves: Draw a card. Activate only if you control five or more lands.

When Crystal Grotto enters the battlefield, scry 1. {T}: Add {C}. {1}, {T}: Add one mana of any color.

Indestructible {T}: Add {C}.

{T}: Add {C}. {2}, {T}, Sacrifice Demolition Field: Destroy target nonbasic land an opponent controls. That land's controller may search their library for a basic land card, put it onto the battlefield, then shuffle. You may search your library for a basic land card, put it onto the battlefield, then shuffle.

{T}: Add {C}. When Dunes of the Dead is put into a graveyard from the battlefield, create a 2/2 black Zombie creature token.

{T}: Add {C}. {1}, {T}, Sacrifice Emergence Zone: You may cast spells this turn as though they had flash.

{T}: Add {C}. {2}, {T}, Sacrifice Field of Ruin: Destroy target nonbasic land an opponent controls. Each player searches their library for a basic land card, puts it onto the battlefield, then shuffles.

{T}: Add {C}. {1}, {T}: Add one mana of any color. {1}, {T}, Tap an untapped Gate you control: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

{T}: Add {C}. ({C} represents colorless mana.) {T}, Tap an untapped creature you control: Add one mana of any color.

Mirrorpool enters the battlefield tapped. {T}: Add {C}. {2}{C}, {T}, Sacrifice Mirrorpool: Copy target instant or sorcery spell you control. You may choose new targets for the copy. {4}{C}, {T}, Sacrifice Mirrorpool: Create a token that's a copy of target creature you control.

{T}: Add {C}. {2}: Mishra's Foundry becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {1}, {T}: Target attacking Assembly-Worker gets +2/+2 until end of turn.

{T}: Add {C}. {1}, {T}: Add one mana of any color.

When Radiant Fountain enters the battlefield, you gain 2 life. {T}: Add {C}.

{T}: Add {C}. {2}, {T}, Sacrifice Roadside Reliquary: Draw a card if you control an artifact. Draw a card if you control an enchantment.

{T}: Add {C}. {4}, {T}, Sacrifice Sequestered Stash: Mill five cards. Then you may put an artifact card from your graveyard on top of your library.

Shimmerdrift Vale enters the battlefield tapped. As Shimmerdrift Vale enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

When Sunscorched Desert enters the battlefield, it deals 1 damage to target player or planeswalker. {T}: Add {C}.

{T}: Add {C}. {T}, Tap an untapped creature you control: Add one mana of any color.

As Temple of the Dragon Queen enters the battlefield, you may reveal a Dragon card from your hand. Temple of the Dragon Queen enters the battlefield tapped unless you revealed a Dragon card this way or you control a Dragon. As Temple of the Dragon Queen enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

{T}: Add {C}. {3}, {T}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Uncharted Haven enters the battlefield tapped. As Uncharted Haven enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

{T}: Add {C}. {1}, {T}: Add one mana of any color.

{T}: Add {C}.

Colorless spells you cast cost {2} less to cast. +1: Exile the top card of your library face down and look at it. Create a 2/2 colorless Spirit creature token. When that token leaves the battlefield, put the exiled card into your hand. −3: Destroy target permanent that's one or more colors.

As Caged Sun enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+1. Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.

Impossible Girl — If Clara Oswald is your commander, choose a color before the game begins. Clara Oswald is the chosen color. If a triggered ability of a Doctor you control triggers, that ability triggers an additional time. Doctor's companion (You can have two commanders if the other is the Doctor.)

{T}: Choose a color of a permanent you control. Add one mana of that color.

Whenever an opponent draws a card, you may pay {1}. If you do, draw a card.

You may look at the top card of your library any time. You may cast artifact spells and colorless spells from the top of your library. {T}, Pay 1 life: Exile the top card of your library.

Nyx Lotus enters the battlefield tapped. {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

As Painter's Servant enters the battlefield, choose a color. All cards that aren't on the battlefield, spells, and permanents are the chosen color in addition to their other colors.

As Seal of the Guildpact enters the battlefield, choose two colors. Each spell you cast costs {1} less to cast for each of the chosen colors it is.

If a land is tapped for two or more mana, it produces {C} instead of any other type and amount. Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn.