| CorruptMagic Player Rewards 2008 · 7 | Magic Player Rewards 2008 | 7 | Rare | €0.47 |
| CorruptIDW Comics Inserts · 12 | IDW Comics Inserts | 12 | Rare | €6.13 |
| Corrupted CrossroadsModern Horizons 3 Commander · 332 | Modern Horizons 3 Commander | 332 | Rare | €0.02 |
| Corrupted CrossroadsOath of the Gatewatch · 169 | Oath of the Gatewatch | 169 | Rare | €0.17 |
| Corrupted CrossroadsOath of the Gatewatch Promos · 169s | Oath of the Gatewatch Promos | 169s | Rare | €0.50 |
| Corrupted GrafstoneShadows over Innistrad Promos · 253s | Shadows over Innistrad Promos | 253s | Rare | €0.33 |
| Corrupted GrafstoneShadows over Innistrad · 253 | Shadows over Innistrad | 253 | Rare | €0.20 |
| Corrupted KeyMystery Booster Playtest Cards 2019 · 39 | Mystery Booster Playtest Cards 2019 | 39 | Rare | $0.73 |
| Corrupted KeyMystery Booster Playtest Cards 2021 · 39 | Mystery Booster Playtest Cards 2021 | 39 | Rare | $0.28 |
| Corrupt OfficialMercadian Masques · 128 | Mercadian Masques | 128 | Rare | €0.32 |
| Corsair CaptainFoundations · 506 | Foundations | 506 | Rare | $0.24 |
| Corsair CaptainJumpstart · 11 | Jumpstart | 11 | Rare | €0.32 |
| Corsair CaptainThe Lost Caverns of Ixalan Commander · 149 | The Lost Caverns of Ixalan Commander | 149 | Rare | €0.22 |
| Corsairs of UmbarTales of Middle-earth Commander · 19 | Tales of Middle-earth Commander | 19 | Rare | $0.38 |
| Corsairs of UmbarTales of Middle-earth Commander · 102 | Tales of Middle-earth Commander | 102 | Rare | $1.64 |
| Corsairs of UmbarTales of Middle-earth Commander · 421 | Tales of Middle-earth Commander | 421 | Rare | €1.63 |
| Cosima, God of the Voyage // The OmenkeelKaldheim · 50 | Kaldheim | 50 | Rare | €0.74 |
| Cosima, God of the Voyage // The OmenkeelKaldheim · 303 | Kaldheim | 303 | Rare | $0.54 |
| Cosima, God of the Voyage // The OmenkeelKaldheim Promos · 50s | Kaldheim Promos | 50s | Rare | €0.20 |
| Cosima, God of the Voyage // The OmenkeelThe List Tokens · KHM-50 | The List Tokens | KHM-50 | Rare | $0.79 |
| Cosima, God of the Voyage // The OmenkeelMagic Online Promos · 88258 | Magic Online Promos | 88258 | Rare | — |
| Cosi's TricksterZendikar · 45 | Zendikar | 45 | Rare | $0.46 |
| Cosmic CrucibleMarvel Super Heroes Commander · 79 | Marvel Super Heroes Commander | 79 | Rare | $0.40 |
| Cosmic CrucibleMarvel Super Heroes Commander · 397 | Marvel Super Heroes Commander | 397 | Rare | €1.18 |
| Cosmic EpiphanyDominaria United · 283 | Dominaria United | 283 | Rare | €0.17 |
| Cosmic EpiphanyDominaria United · 424 | Dominaria United | 424 | Rare | $0.29 |
| Cosmic EpiphanyMagic Online Promos · 103406 | Magic Online Promos | 103406 | Rare | — |
| Cosmic HorrorFourth Edition Foreign Black Border · 126 | Fourth Edition Foreign Black Border | 126 | Rare | €6.34 |
| Cosmic HorrorFourth Edition · 126 | Fourth Edition | 126 | Rare | $0.38 |
| Cosmic HorrorLegends · 92 | Legends | 92 | Rare | €12.29 |
| Cosmic HorrorMasters Edition III · 61 | Masters Edition III | 61 | Rare | — |
| Cosmic InterventionKaldheim Commander · 3 | Kaldheim Commander | 3 | Rare | €3.15 |
| Cosmic LarvaFifth Dawn · 63 | Fifth Dawn | 63 | Rare | $0.38 |
| Cosmium ConfluenceThe Lost Caverns of Ixalan · 181 | The Lost Caverns of Ixalan | 181 | Rare | €0.02 |
| Cosmium ConfluenceThe Lost Caverns of Ixalan · 379 | The Lost Caverns of Ixalan | 379 | Rare | €0.18 |
| Cosmium ConfluenceThe Lost Caverns of Ixalan Promos · 181p | The Lost Caverns of Ixalan Promos | 181p | Rare | €0.08 |
| Cosmium ConfluenceThe Lost Caverns of Ixalan Promos · 181s | The Lost Caverns of Ixalan Promos | 181s | Rare | €0.33 |
| CosmogoyfEdge of Eternities · 215 | Edge of Eternities | 215 | Rare | $0.28 |
| CosmogoyfEdge of Eternities · 313 | Edge of Eternities | 313 | Rare | $0.84 |
| CosmogoyfEdge of Eternities Promos · 215p | Edge of Eternities Promos | 215p | Rare | €0.24 |
| CosmogoyfEdge of Eternities Promos · 215s | Edge of Eternities Promos | 215s | Rare | $0.75 |
| Cosmos ChargerKaldheim · 51 | Kaldheim | 51 | Rare | €0.19 |
| Cosmos ChargerKaldheim · 342 | Kaldheim | 342 | Rare | €0.28 |
| Cosmos ChargerKaldheim Promos · 51p | Kaldheim Promos | 51p | Rare | €0.21 |
| Cosmos ChargerKaldheim Promos · 51s | Kaldheim Promos | 51s | Rare | €0.32 |
| Cosmos ChargerMagic Online Promos · 88244 | Magic Online Promos | 88244 | Rare | — |
| Cosmos ElixirKaldheim · 237 | Kaldheim | 237 | Rare | €2.57 |
| Cosmos ElixirKaldheim · 368 | Kaldheim | 368 | Rare | €3.29 |
| Cosmos ElixirKaldheim Promos · 237p | Kaldheim Promos | 237p | Rare | €2.62 |
| Cosmos ElixirKaldheim Promos · 237s | Kaldheim Promos | 237s | Rare | €1.93 |