| Copy EnchantmentMagic Online Theme Decks · A21 | Magic Online Theme Decks | A21 | Rare | — |
| Copy LandModern Horizons 3 Commander · 47 | Modern Horizons 3 Commander | 47 | Rare | €0.92 |
| Copy LandModern Horizons 3 Commander · 99 | Modern Horizons 3 Commander | 99 | Rare | $0.31 |
| Coral HelmFourth Edition Foreign Black Border · 310 | Fourth Edition Foreign Black Border | 310 | Rare | €3.56 |
| Coral HelmFourth Edition · 310 | Fourth Edition | 310 | Rare | $0.32 |
| Coral HelmFifth Edition · 359 | Fifth Edition | 359 | Rare | $0.28 |
| Coral HelmAntiquities · 47 | Antiquities | 47 | Rare | $5.76 |
| Coralhelm ChroniclerZendikar Rising Promos · 54p | Zendikar Rising Promos | 54p | Rare | $0.15 |
| Coralhelm ChroniclerZendikar Rising Promos · 54s | Zendikar Rising Promos | 54s | Rare | €0.35 |
| Coralhelm ChroniclerZendikar Rising · 54 | Zendikar Rising | 54 | Rare | $0.07 |
| Coralhelm ChroniclerZendikar Rising · 327 | Zendikar Rising | 327 | Rare | €0.20 |
| Coralhelm ChroniclerMagic Online Promos · 83748 | Magic Online Promos | 83748 | Rare | — |
| Coralhelm CommanderThe Lost Caverns of Ixalan Commander · 148 | The Lost Caverns of Ixalan Commander | 148 | Rare | $0.26 |
| Coralhelm CommanderRise of the Eldrazi · 57 | Rise of the Eldrazi | 57 | Rare | $0.45 |
| Cordial VampireThe Lost Caverns of Ixalan Commander · 189 | The Lost Caverns of Ixalan Commander | 189 | Rare | €2.00 |
| Cordial VampireModern Horizons · 83 | Modern Horizons | 83 | Rare | €1.93 |
| Cordial VampireCrimson Vow Commander · 125 | Crimson Vow Commander | 125 | Rare | €1.50 |
| Cordial VampireJumpstart: Historic Horizons · 306 | Jumpstart: Historic Horizons | 306 | Rare | — |
| Cori Mountain MonasteryTarkir: Dragonstorm Promos · 252p | Tarkir: Dragonstorm Promos | 252p | Rare | $0.46 |
| Cori Mountain MonasteryTarkir: Dragonstorm Promos · 252s | Tarkir: Dragonstorm Promos | 252s | Rare | €1.13 |
| Cori Mountain MonasteryTarkir: Dragonstorm · 252 | Tarkir: Dragonstorm | 252 | Rare | €0.91 |
| Cori Mountain MonasteryTarkir: Dragonstorm · 393 | Tarkir: Dragonstorm | 393 | Rare | €1.77 |
| Cori-Steel CutterTarkir: Dragonstorm Promos · 103p | Tarkir: Dragonstorm Promos | 103p | Rare | $4.75 |
| Cori-Steel CutterTarkir: Dragonstorm Promos · 103s | Tarkir: Dragonstorm Promos | 103s | Rare | €8.32 |
| Cori-Steel CutterTarkir: Dragonstorm · 103 | Tarkir: Dragonstorm | 103 | Rare | $5.24 |
| Cori-Steel CutterTarkir: Dragonstorm · 343 | Tarkir: Dragonstorm | 343 | Rare | $4.88 |
| Cornered MarketMercadian Masques · 14 | Mercadian Masques | 14 | Rare | €0.46 |
| Corporeal ProjectionRavnica: Clue Edition · 28 | Ravnica: Clue Edition | 28 | Rare | €8.53 |
| Corpse AugurLegendary Cube Prize Pack · 40 | Legendary Cube Prize Pack | 40 | Rare | — |
| Corpse ConnoisseurSecret Lair Drop Tokens · 838 | Secret Lair Drop Tokens | 838 | Rare | $1.50 |
| Corpse DanceTempest · 116 | Tempest | 116 | Rare | €23.09 |
| Corpse DanceWorld Championship Decks 1999 Tokens · js116 | World Championship Decks 1999 Tokens | js116 | Rare | €6.01 |
| Corpse DanceTempest Remastered · 89 | Tempest Remastered | 89 | Rare | — |
| Corpse ExplosionStreets of New Capenna Promos · 179p | Streets of New Capenna Promos | 179p | Rare | $0.20 |
| Corpse ExplosionStreets of New Capenna Promos · 179s | Streets of New Capenna Promos | 179s | Rare | $0.33 |
| Corpse ExplosionStreets of New Capenna · 179 | Streets of New Capenna | 179 | Rare | €0.24 |
| Corpse ExplosionStreets of New Capenna · 435 | Streets of New Capenna | 435 | Rare | €0.18 |
| Corpse ExplosionMagic Online Promos · 99723 | Magic Online Promos | 99723 | Rare | — |
| Corpsejack MenaceCommander 2016 · 190 | Commander 2016 | 190 | Rare | €0.43 |
| Corpsejack MenaceCommander Anthology Volume II · 152 | Commander Anthology Volume II | 152 | Rare | €0.66 |
| Corpsejack MenaceReturn to Ravnica Promos · 152★ | Return to Ravnica Promos | 152★ | Rare | €1.06 |
| Corpsejack MenaceReturn to Ravnica · 152 | Return to Ravnica | 152 | Rare | €0.56 |
| Corpsejack MenaceTeenage Mutant Ninja Turtles Eternal · 56 | Teenage Mutant Ninja Turtles Eternal | 56 | Rare | €0.20 |
| Corpsejack MenaceMagic Online Promos · 46887 | Magic Online Promos | 46887 | Rare | — |
| Corpses of the LostThe Lost Caverns of Ixalan · 98 | The Lost Caverns of Ixalan | 98 | Rare | €0.23 |
| Corpses of the LostThe Lost Caverns of Ixalan · 366 | The Lost Caverns of Ixalan | 366 | Rare | €0.38 |
| Corpses of the LostThe Lost Caverns of Ixalan Promos · 98p | The Lost Caverns of Ixalan Promos | 98p | Rare | €0.29 |
| Corpses of the LostThe Lost Caverns of Ixalan Promos · 98s | The Lost Caverns of Ixalan Promos | 98s | Rare | €0.70 |
| CorpseweftDragons of Tarkir · 92 | Dragons of Tarkir | 92 | Rare | $0.15 |
| CorrosionVisions · 128 | Visions | 128 | Rare | €1.30 |