Whenever you activate an ability, if it isn't a mana ability, you may pay {2}. If you do, copy that ability. You may choose new targets for the copy.

Imprint — When Duplicant enters the battlefield, you may exile target nontoken creature. As long as a card exiled with Duplicant is a creature card, Duplicant has the power, toughness, and creature types of the last creature card exiled with Duplicant. It's still a Shapeshifter.

+1: Reveal the top two cards of your library. An opponent chooses one of them. Put that card into your hand and exile the other with a silver counter on it. −1: Put a card you own with a silver counter on it from exile into your hand. −2: Create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."

Draw cards equal to the highest mana value among artifacts you control.

{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.

+1: Look at the top five cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order. −1: Target artifact becomes an artifact creature with base power and toughness 5/5. −4: Target player loses X life and you gain X life, where X is twice the number of artifacts you control.

+1: Create a 1/1 colorless Thopter artifact creature token with flying. 0: Draw a card. If you control three or more artifacts, draw two cards instead. −9: You get an emblem with "At the beginning of your end step, search your library for a permanent card, put it onto the battlefield, then shuffle."

+1: Draw a card. 0: Until your next turn, target artifact you control becomes a 5/5 creature in addition to its other types. −7: Put any number of cards from your hand onto the battlefield face down. They're 5/5 artifact creatures.

{T}: Add {C}. {1}{U}, {T}: Put target artifact card from your graveyard on top of your library.

{T}: Add {C}. {T}: Add {W} or {U}. Adarkar Wastes deals 1 damage to you.

{T}: Add {W}.

{T}: Add {C}. {2}, {T}, Sacrifice Buried Ruin: Return target artifact card from your graveyard to your hand.

{T}: Add {C}. {T}: Add {W} or {B}. Caves of Koilos deals 1 damage to you.

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

Indestructible {T}: Add {C}.

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

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

({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.

({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.

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 {U}.)

{T}: Add {C}. {4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

({T}: Add {W}.)

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

You have no maximum hand size. {T}: Add {C}.

{T}: Add {U}.

({T}: Add {B}.)

{T}: Add {C}. {T}: Add {U} or {B}. Underground River deals 1 damage to you.

{T}: Add {B}.

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate again. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

When Deepglow Skate enters the battlefield, double the number of each kind of counter on any number of target permanents.

Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Counter target spell, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Artifacts you control have indestructible. (Effects that say "destroy" don't destroy them. Artifact creatures with indestructible can't be destroyed by damage.)

Sacrifice a creature: Add {C}{C}.

Basalt Monolith doesn't untap during your untap step. {T}: Add {C}{C}{C}. {3}: Untap Basalt Monolith.

{1}, {T}: Add {U}{B}.

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

Sacrifice an artifact: Add {C}{C}.

{1}, {T}: Add {W}{B}.

Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") At the beginning of your upkeep, if you control ten or more Treasures, you win the game.

Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

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

Creature and planeswalker spells you cast have affinity for artifacts. (They cost {1} less to cast for each artifact you control.) +2: Tezzeret, Master of the Bridge deals X damage to each opponent, where X is the number of artifacts you control. You gain X life. −3: Return target artifact card from your graveyard to your hand. −8: Exile the top ten cards of your library. Put all artifact cards from among them onto the battlefield.

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

Exile target nonland permanent. You lose 3 life.

Search target player's library for a card and exile it. Then that player shuffles. Gravestorm (When you cast this spell, copy it for each permanent put into a graveyard this turn. You may choose new targets for the copies.)

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.")

Destroy all creatures. They can't be regenerated.

+4: Target player exiles a card from their hand. −3: Exile target permanent. −14: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn Liberated. Then put those cards onto the battlefield under your control.

Choose one — • Exile all artifacts. • Exile all creatures. • Exile all enchantments. • Exile all planeswalkers.

Nevinyrral's Disk enters the battlefield tapped. {1}, {T}: Destroy all artifacts, creatures, and enchantments.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

Exile target creature. Its controller gains life equal to its power.

Destroy any number of target planeswalkers. Choose a planeswalker you control. Put two loyalty counters on it for each planeswalker destroyed this way.

+2: Ugin, the Spirit Dragon deals 3 damage to any target. −X: Exile each permanent with mana value X or less that's one or more colors. −10: You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.

Exile target nonland permanent.

When Arena Rector dies, you may exile it. If you do, search your library for a planeswalker card, put it onto the battlefield, then shuffle.

Search your library for a planeswalker card, reveal it, put it into your hand, then shuffle.

Search your library for a card, put that card into your hand, then shuffle.

Vigilance When Djeru, With Eyes Open enters the battlefield, you may search your library for a planeswalker card, reveal it, put it into your hand, then shuffle. If a source would deal damage to a planeswalker you control, prevent 1 of that damage.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

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

Search your library for up to two planeswalker cards, reveal them, put them into your hand, then shuffle.

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