Karn's power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add {C} for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.

Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.

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

{1}, {T}, Sacrifice this artifact: Add one mana of any color. When this artifact is put into a graveyard from the battlefield, draw a card.

Tap two untapped artifacts you control: Untap target artifact.

As this artifact enters, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast.

Indestructible (Effects that say "destroy" don't destroy this artifact.) {T}: Add one mana of any color.

Indestructible Equipped creature has indestructible. Equip {2}

Each spell costs {3} more to cast except during its controller's turn.

When this artifact enters, draw a card. Sacrifice this artifact: Choose a basic land type. Each land you control becomes that type until end of turn.

{1}, {T}: Return target creature to its owner's hand unless its controller pays {1}.

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

Whenever you cast an artifact spell, you may put a charge counter on this artifact. Remove three charge counters from this artifact: Create a 3/3 colorless Golem artifact creature token.

Whenever a player casts an artifact spell, you may gain 1 life.

{T}: Add {C}{C}. {2}, {T}, Sacrifice this artifact: Draw two cards.

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

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) {1}, {T}, Sacrifice an artifact: Return target artifact you control to its owner's hand.

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for {1}.)

{2}, {T}: Draw a card, then discard a card.

{T}, Discard a card: Up to one target creature can't be blocked this turn. Whenever this artifact becomes untapped, you may pay {2}. If you do, draw a card.

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

{W}{U}{B}{R}{G}: Exile target permanent. If Legacy Weapon would be put into a graveyard from anywhere, reveal Legacy Weapon and shuffle it into its owner's library instead.

{2}, {T}: Copy target activated or triggered ability you control. You may choose new targets for the copy. {3}, {T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. {4}, {T}: Copy target permanent spell you control. (The copy becomes a token.)

{1}, {T}: Untap another target artifact. {3}, {T}: Target creature can't be blocked this turn.

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

{2}: This artifact becomes a copy of target artifact, creature, enchantment, or land until end of turn.

Whenever another nontoken artifact you control enters, you may pay {2}. If you do, create a token that's a copy of that artifact.

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.

This artifact enters tapped. {1}, {T}: Destroy all artifacts, creatures, and enchantments.

{T}: Target creature gets +1/+1 and gains flying, first strike, and trample until end of turn.

You may have this artifact enter as a copy of any artifact on the battlefield.

Imprint — When this artifact enters, you may exile a nonland card from your hand. Spells you cast that share a card type with the exiled card cost {2} less to cast.

Kicker {3} Indestructible When this artifact enters, if it was kicked, create two tapped tokens that are copies of this artifact. {T}: Add one mana of any color.

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

When this artifact enters, exile target card from a graveyard. {T}, Sacrifice this artifact: Exile each opponent's graveyard. {1}, {T}, Sacrifice this artifact: Draw a card.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and {T} no matter when it came under your control.) Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Fading 4 (This artifact enters with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.) At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on this artifact.

{1}, {T}, Discard a card: You gain 4 life. {1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token. {1}, {T}, Sacrifice a creature: Return target artifact card from your graveyard to your hand. {1}, {T}, Sacrifice an artifact: Draw a card.

Untap all artifacts you control during each other player's untap step.

You may cast spells as though they had flash.

Equipped creature has trample and can't be blocked by more than one creature. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

When this creature enters, return a nonland permanent you control to its owner's hand.

Trample Whenever another artifact enters, put a +1/+1 counter on this creature. Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Sacrifice an artifact: Put a +1/+1 counter on this creature. Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Remove a +1/+1 counter from this creature: Put target artifact card from your graveyard on top of your library. Modular 2 (This creature enters with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Flying Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Trample {3}{R}, Sacrifice an artifact: Bosh deals damage equal to the sacrificed artifact's mana value to any target.

Trample When this creature dies, you gain life equal to its power.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Indestructible (Damage and effects that say "destroy" don't destroy this creature.) If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.

Indestructible (Damage and effects that say "destroy" don't destroy this creature. If its toughness is 0 or less, it's still put into its owner's graveyard.)

Flash (You may cast this spell any time you could cast an instant.) Vigilance Indestructible (Damage and effects that say "destroy" don't destroy this creature. If its toughness is 0 or less, it's still put into its owner's graveyard.)

Echo {4} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) Sacrifice an artifact: Put a +1/+1 counter on target creature.

Artifact spells you cast cost {1} less to cast.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Whenever a nontoken creature enters, if this artifact is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.

This creature enters with X +1/+1 counters on it. When this creature dies, create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on this creature. {1}, {T}: Put a +1/+1 counter on this creature.

Whenever this creature attacks or blocks, each player draws a card.

Flying Historic spells you cast cost {1} less to cast. (Artifacts, legendaries, and Sagas are historic.)

Flying When this creature dies, return another target artifact card from your graveyard to your hand.

Defender {T}: Put target card from a graveyard on the bottom of its owner's library.

Nonartifact spells cost {1} more to cast.

This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control. Sacrifice two artifacts: Return this card from your graveyard to your hand.

When this creature enters, destroy target nonland permanent an opponent controls.

Whenever you cast a historic spell, you may pay {1}. If you do, create a token that's a copy of this creature. (Artifacts, legendaries, and Sagas are historic.)

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Artifact creature spells you cast have affinity for artifacts. (They cost {1} less to cast for each artifact you control.)

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

When this creature dies, return another target artifact card from your graveyard to your hand.

Kicker {3} If this creature was kicked, it enters with a +1/+1 counter on it for each nonbasic land your opponents control. When this creature becomes the target of a spell, sacrifice it and create a number of 1/1 colorless Construct artifact creature tokens equal to its power.

Flying

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

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

This creature enters with five +1/+1 counters on it. {1}, Remove a +1/+1 counter from this creature: Create a 1/1 colorless Pentavite artifact creature token with flying. {1}, Sacrifice a Pentavite: Put a +1/+1 counter on this creature.

When this creature dies, create three 3/3 colorless Phyrexian Golem artifact creature tokens. Encore {12} ({12}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

When this creature enters, create two 3/3 colorless Golem artifact creature tokens. Whenever a player casts an instant or sorcery spell that targets only a single Golem, that player copies that spell for each other Golem that spell could target. Each copy targets a different one of those Golems.

Whenever this creature dies 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.

Flash You may cast artifact spells as though they had flash.

When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. When this creature dies, you may draw a card.

Flying At the beginning of your upkeep, if you control no Thopters other than this creature, return this creature to its owner's hand and create five 1/1 colorless Thopter artifact creature tokens with flying.

This land enters tapped. When this land enters, return a land you control to its owner's hand. If another Desert was returned this way, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) {T}: Add {C}{C}.

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

Indestructible {T}: Add {C}. {5}, {T}: Add five mana in any combination of colors.

{T}: Add {C}. {T}, Sacrifice this land: Put your commander into your hand from the command zone.

When this land enters, scry 1. {T}: Add {C}. {1}, {T}: Add one mana of any color.

Indestructible {T}: Add {C}.

{T}: Add {C}. {2}, {T}, Sacrifice this land: 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}. {1}, {T}, Sacrifice this land: You may cast spells this turn as though they had flash.

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}: Add {C}. {2}, {T}, Sacrifice this land: 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}. {T}: Choose target commander that entered this turn. Put a +1/+1 counter on it if it's a creature and a loyalty counter on it if it's a planeswalker.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {C}{C}.

{T}: Add {C}. {1}, {T}: Add one mana of any color. {4}, {T}: Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")

{T}: Add {C}. {T}, Sacrifice a creature: You gain 1 life.

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

{T}: Add {C}. {4}, {T}: Remove target attacking or blocking creature from combat.

{T}: Add {C}{C}{C}. Spend this mana only to cast artifact spells.

{T}: Add {C}. {4}, {T}: Exile target attacking creature an opponent controls. At the beginning of the next end step, return it to the battlefield tapped under its owner's control.

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

{T}: Add {C}. {1}, {T}, Sacrifice an artifact: You gain 1 life.

This land enters tapped. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast artifact spells or activate abilities of artifacts. Modular 1

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

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

{T}: Add {C}. {T}: Add {C}{C}. Spend this mana only to cast colorless spells. Activate only if you control seven or more lands.

{T}: Add {C}{C}. Activate only if you control five or more lands.