| ClambassadorsUnglued · 18 | Unglued | 18 | Common | €0.24 |
| Clam-I-AmUnglued · 19 | Unglued | 19 | Common | $0.30 |
| Clamilton EstateBlack Lotus Unknown Planechase · PLA012 | Black Lotus Unknown Planechase | PLA012 | Common | — |
| Clammy ProwlerDuskmourn: House of Horror · 45 | Duskmourn: House of Horror | 45 | Common | €0.09 |
| Clamorous IroncladAetherdrift · 117 | Aetherdrift | 117 | Common | €0.05 |
| Clamorous IroncladAetherdrift · 312 | Aetherdrift | 312 | Common | €0.09 |
| Clamor ShamanRavnica Allegiance · 96 | Ravnica Allegiance | 96 | Uncommon | €0.09 |
| Clam SessionUnglued · 20 | Unglued | 20 | Common | €0.12 |
| Clan CrafterCommander Legends: Battle for Baldur's Gate · 614 | Commander Legends: Battle for Baldur's Gate | 614 | Mythic Rare | $1.31 |
| Clan CrafterCommander Legends: Battle for Baldur's Gate · 651 | Commander Legends: Battle for Baldur's Gate | 651 | Mythic Rare | €0.58 |
| Clan DefianceCommander 2016 · 187 | Commander 2016 | 187 | Rare | €0.30 |
| Clan DefianceRavnica: Clue Edition · 182 | Ravnica: Clue Edition | 182 | Rare | €0.18 |
| Clan DefianceGatecrash · 151 | Gatecrash | 151 | Rare | €0.16 |
| Clan DefianceStarter Commander Decks · 220 | Starter Commander Decks | 220 | Rare | $0.15 |
| Clandestine ChameleonUnfinity · 134 | Unfinity | 134 | Uncommon | €0.06 |
| Clandestine ChameleonUnfinity · 420 | Unfinity | 420 | Uncommon | $0.77 |
| Clandestine MeddlerMurders at Karlov Manor · 82 | Murders at Karlov Manor | 82 | Uncommon | €0.05 |
| Clandestine MeddlerMurders at Karlov Manor · 82† | Murders at Karlov Manor | 82† | Uncommon | $0.04 |
| Clan GuildmageRavnica Allegiance · 162 | Ravnica Allegiance | 162 | Uncommon | €0.04 |
| Clara OswaldDoctor Who · 9 | Doctor Who | 9 | Rare | €0.17 |
| Clara OswaldDoctor Who · 332 | Doctor Who | 332 | Rare | €1.75 |
| Clara OswaldDoctor Who · 614 | Doctor Who | 614 | Rare | €4.28 |
| Clara OswaldDoctor Who · 923 | Doctor Who | 923 | Rare | €5.48 |
| Clarion CatharsInnistrad: Double Feature · 14 | Innistrad: Double Feature | 14 | Common | €0.07 |
| Clarion CatharsInnistrad: Midnight Hunt · 14 | Innistrad: Midnight Hunt | 14 | Common | €0.05 |
| Clarion ConquerorTarkir: Dragonstorm Promos · 5p | Tarkir: Dragonstorm Promos | 5p | Rare | $2.10 |
| Clarion ConquerorTarkir: Dragonstorm Promos · 5s | Tarkir: Dragonstorm Promos | 5s | Rare | €2.92 |
| Clarion ConquerorTarkir: Dragonstorm · 5 | Tarkir: Dragonstorm | 5 | Rare | €2.59 |
| Clarion ConquerorTarkir: Dragonstorm · 400 | Tarkir: Dragonstorm | 400 | Mythic Rare | €13.97 |
| Clarion ConquerorTarkir: Dragonstorm · 410 | Tarkir: Dragonstorm | 410 | Mythic Rare | €76.21 |
| Clarion Conqueror // Clarion ConquerorTarkir: Dragonstorm · 377 | Tarkir: Dragonstorm | 377 | Rare | $3.01 |
| Clarion SpiritKaldheim · 6 | Kaldheim | 6 | Uncommon | €0.18 |
| Clarion SpiritThe List Tokens · KHM-6 | The List Tokens | KHM-6 | Uncommon | $0.20 |
| Clarion UltimatumShards of Alara · 163 | Shards of Alara | 163 | Rare | €0.22 |
| Clash of ElementsReality Fracture · 126 | Reality Fracture | 126 | Uncommon | €0.08 |
| Clash of RealitiesBetrayers of Kamigawa · 97 | Betrayers of Kamigawa | 97 | Rare | €0.22 |
| Clash of the EikonsFinal Fantasy · 180 | Final Fantasy | 180 | Uncommon | €0.08 |
| Clash of the EikonsFinal Fantasy · 341 | Final Fantasy | 341 | Uncommon | €0.28 |
| Clash of TitansIkoria: Lair of Behemoths · 111 | Ikoria: Lair of Behemoths | 111 | Uncommon | €0.07 |
| Clash of WillsFriday Night Magic 2016 · 2 | Friday Night Magic 2016 | 2 | Rare | €0.26 |
| Clash of WillsMagic Origins · 49 | Magic Origins | 49 | Uncommon | $0.20 |
| Clash of WillsMagic Online Promos · 59671 | Magic Online Promos | 59671 | Uncommon | — |
| Clattering AugurModern Horizons 2 · 79 | Modern Horizons 2 | 79 | Uncommon | €0.12 |
| Clattering AugurJumpstart: Historic Horizons · 305 | Jumpstart: Historic Horizons | 305 | Uncommon | — |
| Clattering SkeletonsAdventures in the Forgotten Realms · 93 | Adventures in the Forgotten Realms | 93 | Common | €0.04 |
| Clattering SkeletonsAdventures in the Forgotten Realms · 312 | Adventures in the Forgotten Realms | 312 | Common | €0.14 |
| ClaustrophobiaBattlebond · 115 | Battlebond | 115 | Common | €0.02 |
| ClaustrophobiaDuel Decks: Jace vs. Vraska · 27 | Duel Decks: Jace vs. Vraska | 27 | Common | €0.03 |
| ClaustrophobiaDuel Decks: Merfolk vs. Goblins · 3 | Duel Decks: Merfolk vs. Goblins | 3 | Common | $0.06 |
| ClaustrophobiaGame Night 2019 · 17 | Game Night 2019 | 17 | Common | €0.07 |