{U}, {T}: Add {C}{C}{C}.

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

Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

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

Blue creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, target creature an opponent controls doesn't untap during its controller's next untap step.

{T}: Add {C}.

{T}: Add {C}. {1}, {T}, Sacrifice this artifact: Draw a card.

{T}: Add {C}{U}. Spend this mana only to activate abilities.

Flying {T}: Add one mana of any color.

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

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

{T}: Add {U}.

This artifact enters tapped. {T}: Add {U}.

As this creature enters, choose a color. Chameleon Spirit's power and toughness are each equal to the number of permanents of the chosen color your opponents control.

{1}{U}: Target spell or permanent becomes the color of your choice until end of turn.

As this creature enters, 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 this enchantment enters, choose a color. All nonland permanents are the chosen color.

Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black spell" to "target blue spell." This effect lasts indefinitely.)

Any number of target creatures become the color of your choice until end of turn. Draw a card.

As this enchantment enters, choose a color word. All instances of color words in the text of spells and permanents are changed to the chosen color word.

Cumulative upkeep {U} (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.) Green creatures have "Cumulative upkeep {1}."

Choose one — • Counter target spell with mana value 2 or less. • Counter target red or green spell with mana value 6 or less.

Enchant green or white creature Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you discard a card."

Whenever a creature becomes the target of a spell or ability, return that creature to its owner's hand. (It won't be affected by the spell or ability.)

Each creature your opponents control is an Illusion in addition to its other types and has "When this creature becomes the target of a spell or ability, sacrifice it."

{1}{U}: Counter target red spell.

Enchant permanent As long as enchanted permanent is red or green, it has "At the beginning of your upkeep, sacrifice this permanent unless you pay its mana cost."

Choose one — • Destroy target red permanent. • Return target Mountain to its owner's hand.

Counter target red or green spell.

Counter target blue spell.

Return all green permanents to their owners' hands.

Counter target blue spell. If it was a Jace planeswalker spell, scry 2.

Each player chooses a color. Then exile each permanent unless it's colorless or it's only the color its controller chose.

Target opponent reveals their hand. You draw a card for each Mountain and red card in it.

Flying As an additional cost to cast blue permanent spells, you may pay 2 life. Those spells cost {U} less to cast if you paid life this way. This effect reduces only the amount of blue mana you pay. Whenever you cast a blue permanent spell, draw a card.

Whenever an opponent casts a green spell, you draw a card.

Target opponent reveals their hand. You draw a card for each Forest and green card in it.

Red spells cost {2} more to cast.

Creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped nongreen creatures they control and pay {2} for each creature chosen this way. If the player does, untap those creatures.

Nonbasic lands are Islands.

Red creature spells and green creature spells cost {1} more to cast.

Players can't cast spells that share a color with the spell most recently cast this turn.

{T}: Add {C}. Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

This land enters tapped. When this land enters, sacrifice it unless you return an untapped Island you control to its owner's hand. {T}: Add {C}{U}.

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life. {T}: Add {C}. {4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

{T}: Add {C}. {T}, Pay 1 life: Add {U}. {1}{U}, {T}, Sacrifice a Desert: Target player mills four cards. (They put the top four cards of their library into their graveyard.)

({T}: Add {U}.)

{T}: Add {C}. {T}: Add {U}. Spend this mana only to cast a creature spell. {U}, {T}: Surveil 2. Activate only if a Bird, Frog, Otter, or Rat entered the battlefield under your control this turn.

This land enters tapped. {T}: Add {C}. {2}, {T}, Sacrifice this land: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

This land enters tapped. {T}: Add {C}. {T}, Tap an untapped creature you control: Add one mana of any color. {2}, Sacrifice this land: Draw a card.

Exchange control of two target creatures controlled by different players. If you control neither creature, draw three cards.

Spree (Choose one or more additional costs.) + {2} — Exchange control of two target creatures. + {1} — Exchange control of two target artifacts. + {1} — Exchange control of two target enchantments.

Exchange control of two target creatures you don't control. Flashback {8}{U}{U}. This spell costs {X} less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

{X}, {T}: Search your library for a creature card with mana value X or less, reveal it, put it into your hand, then shuffle.

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.

Search your library for a card, then shuffle and put that card third from the top.

Counter target instant or sorcery spell. Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

When this enchantment enters, search your library for seven cards, exile them in a face-down pile, and shuffle that pile. Then shuffle your library. If you would draw a card, you may instead put the top card of the pile you exiled into your hand.

When Skyship Weatherlight enters, search your library for any number of artifact and/or creature cards, exile them, then shuffle. {4}, {T}: Choose a card at random that was exiled with Skyship Weatherlight. Put that card into its owner's hand.

+1: Untap up to two target artifacts. −X: Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle. −5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.

When this creature enters, you may search your library for an artifact card with mana value 2, reveal that card, put it into your hand, then shuffle.