Cogwork Tracker

Artifact Creature - Hound Construct

Reveal Cogwork Tracker as you draft it and note the player who passed it to you.

Cogwork Tracker attacks each turn if able.

Cogwork Tracker attacks a player you noted for cards named Cogwork Tracker each turn if able.

Colfenor's Urn

Artifact

Whenever a creature with toughness 4 or greater is put into your graveyard from the battlefield, you may exile it.

At the beginning of the end step, if three or more cards have been exiled with Colfenor's Urn, sacrifice it. If you do, return those cards to the battlefield under their owner's control.

Colossus of Akros

Artifact Creature - Golem

Defender, indestructible

: Monstrosity 10. (If this creature isn't monstrous, put ten +1/+1 counters on it and it becomes monstrous.)

As long as Colossus of Akros is monstrous, it has trample and can attack as though it didn't have defender.

Colossus of Sardia

Artifact Creature - Golem

Trample (If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker.)

Colossus of Sardia doesn't untap during your untap step.

: Untap Colossus of Sardia. Activate this ability only during your upkeep.

Buried under a thin layer of dirt, it was known for centuries as Mount Sardia.

Commander's Sphere

Artifact

: Add to your mana pool one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

It harmonizes with the essence of its master.

Composite Golem

Artifact Creature - Golem

Sacrifice Composite Golem: Add to your mana pool.

An artificer's experiment in cross-material engineering found its own purpose as an interpreter between cultures.

Conjurer's Bauble

Artifact

, Sacrifice Conjurer's Bauble: Put up to one target card from your graveyard on the bottom of your library. Draw a card.

It is the moment of discovery, the triumph of the mind, the reimagining of past glory.

Conjurer's Closet

Artifact

At the beginning of your end step, you may exile target creature you control, then return that card to the battlefield under your control.

"Tomorrow wears yesterday's face."
-Kordel the Cryptic

Contagion Clasp

Artifact

When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature.

, : Proliferate. (You choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there.)

Contagion Engine

Artifact

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls.

, : Proliferate, then proliferate again. (You choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there. Then do it again.)

Conversion Chamber

Artifact

, : Exile target artifact card from a graveyard. Put a charge counter on Conversion Chamber.

, , Remove a charge counter from Conversion Chamber: Put a 3/3 colorless Golem artifact creature token onto the battlefield.

Copper Carapace

Artifact - Equipment

Equipped creature gets +2/+2 and can't block.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

"We will fight as they do: our flesh protected behind metal."
-Tae Aquil, Viridan weaponsmith

Copper Myr

Artifact Creature - Myr

: Add to your mana pool.

The myr are like verdigris: an ever-present patina on the surface of a metal world.

Core Prowler

Artifact Creature - Horror

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

When Core Prowler dies, proliferate. (You choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there.)

Coretapper

Artifact Creature - Myr

: Put a charge counter on target artifact.

Sacrifice Coretapper: Put two charge counters on target artifact.

It converts the faintest surges of power from Mirrodin's core into usable energy, providing endless power for Memnarch's creations on the surface.

Corpse Cur

Artifact Creature - Hound

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

When Corpse Cur enters the battlefield, you may return target creature card with infect from your graveyard to your hand.

Courier's Capsule

Artifact

, , Sacrifice Courier's Capsule: Draw two cards.

In ages past, Esper couriers bore messages written on ornate scrolls. The medium has grown more sophisticated, but the principle remains the same.

Court Homunculus

Artifact Creature - Homunculus

Court Homunculus gets +1/+1 as long as you control another artifact.

Mages of Esper measure their wealth and status by the number of servants in their retinues.

Cranial Archive

Artifact

, Exile Cranial Archive: Target player shuffles his or her graveyard into his or her library. Draw a card.

The greatest idea the zombie ever had in its head wasn't even its own.

Cranial Plating

Artifact - Equipment

Equipped creature gets +1/+0 for each artifact you control.

: Attach Cranial Plating to target creature you control.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Crawlspace

Artifact

No more than two creatures can attack you each combat.

The goblins did not understand their attraction to the mana rig. They simply knew it was where they belonged.

Creepy Doll

Artifact Creature - Construct

Indestructible

Whenever Creepy Doll deals combat damage to a creature, flip a coin. If you win the flip, destroy that creature.

A child's porcelain doll went missing one night, as did a pair of kitchen shears and the town magistrate.

Crown of Convergence

Artifact

Play with the top card of your library revealed.

As long as the top card of your library is a creature card, creatures you control that share a color with that card get +1/+1.

: Put the top card of your library on the bottom of your library.

Crown of Doom

Artifact

Whenever a creature attacks you or a planeswalker you control, it gets +2/+0 until end of turn.

: Target player other than Crown of Doom's owner gains control of it. Activate this ability only during your turn.

Every head it rests upon winds up severed.

Crown of Empires

Artifact

, : Tap target creature. Gain control of that creature instead if you control artifacts named Scepter of Empires and Throne of Empires.

"With this crown, assert your authority."
-Crown inscription

Crucible of Worlds

Artifact

You may play land cards from your graveyard.

Amidst the darkest ashes grow the strongest seeds.

Crumbling Colossus

Artifact Creature - Golem

Trample (If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker.)

When Crumbling Colossus attacks, sacrifice it at end of combat.

Crystal Ball

Artifact

, : Scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

It glints with arcane truths to those who know how to glimpse them.

Crystal Rod

Artifact

Whenever a player casts a blue spell, you may pay . If you do, you gain 1 life.

Crystal Shard

Artifact

, or , : Return target creature to its owner's hand unless its controller pays .

Culling Dais

Artifact

, Sacrifice a creature: Put a charge counter on Culling Dais.

, Sacrifice Culling Dais: Draw a card for each charge counter on Culling Dais.

"Forswear the flesh and you will truly see."
-Jin-Gitaxias, Core Augur

Culling Scales

Artifact

At the beginning of your upkeep, destroy target nonland permanent with the lowest converted mana cost. (If two or more permanents are tied for lowest cost, target any one of them.)

Cumber Stone

Artifact

Creatures your opponents control get -1/-0.

"The stone is more potent than ever. The flesh that creeps into our land will become even more slovenly and weak."
-Niclavs, archmage of Esper

Custodian of the Trove

Artifact Creature - Golem

Defender

Custodian of the Trove enters the battlefield tapped.

Silumgar delights in repurposing the treasures of other clans to serve his own ravenous greed.

Cyclopean Snare

Artifact

, : Tap target creature, then return Cyclopean Snare to its owner's hand.

The spoiled, gluttonous halls of the Orzhov teem with gaudy, needless wealth. Even their security measures are made for beauty first, efficiency second.

Damping Matrix

Artifact

Activated abilities of artifacts and creatures can't be activated unless they're mana abilities.

Dancing Scimitar

Artifact Creature - Spirit

Flying (This creature can't be blocked except by creatures with flying or reach.)

A blade that has never known sheath, a hilt that has never known hand.

Darklit Gargoyle

Artifact Creature - Gargoyle

Flying

: Darklit Gargoyle gets +2/-1 until end of turn.

It shines in the darkness of its master's ambitions.

Darksteel Axe

Artifact - Equipment

Darksteel Axe is indestructible. (Effects that say "destroy" don't destroy it.)

Equipped creature gets +2/+0.

Equip

Heavier than it looks, tricky to wield, guaranteed to last.

Darksteel Brute

Artifact

Darksteel Brute is indestructible. ("Destroy" effects and lethal damage don't destroy it.)

: Darksteel Brute becomes a 2/2 Beast artifact creature until end of turn.