| Colossal FighterStarter Deck: Yu-Gi-Oh! 5D's · 043 | Starter Deck: Yu-Gi-Oh! 5D's | 043 | Super Rare | €0.29 |
| Colossal Fighter/Assault ModeCrimson Crisis Sneak Peek Participation Card · 1 | Crimson Crisis Sneak Peek Participation Card | 1 | Super Rare | €0.80 |
| Colosseum - Cage of the Gladiator BeastsGladiator's Assault · 054 | Gladiator's Assault | 054 | Rare | €0.76 |
| Column SwitchExtreme Force · 064 | Extreme Force | 064 | Common | €0.05 |
| Combat WheelMaze of Millennia · 017 | Maze of Millennia | 017 | Rare | €0.04 |
| Combination AttackMagician's Force · 030 | Magician's Force | 030 | Rare | €0.02 |
| Combined Maneuver - Engage Zero!Legendary Modern Decks 2026 · 33 | Legendary Modern Decks 2026 | 33 | Ultra Rare | $0.16 |
| Combo FighterCyberdark Impact · 028 | Cyberdark Impact | 028 | Common | €0.06 |
| Combo MasterCyberdark Impact · 029 | Cyberdark Impact | 029 | Rare | $0.11 |
| Comic CatUnlisted Printings | Unlisted Printings | — | — | — |
| Comic HandDragons of Legend 2 · 026 | Dragons of Legend 2 | 026 | Secret Rare | €3.37 |
| Comics Hero King ArthurNumber Hunters · 041 | Number Hunters | 041 | Secret Rare | €0.18 |
| Commander CovingtonMachina Mayhem Structure Deck · 005 | Machina Mayhem Structure Deck | 005 | Common | €0.04 |
| Commander Gottoms, SwordmasterHidden Arsenal · 013 | Hidden Arsenal | 013 | Secret Rare | $0.23 |
| Commander of SwordsGalactic Overlord · 068 | Galactic Overlord | 068 | Common | €0.09 |
| Commander Souza, SwordmasterLegendary Modern Decks 2026 · 42 | Legendary Modern Decks 2026 | 42 | Ultra Rare | €0.08 |
| Command KnightCollectible Tins 2004 · 003 | Collectible Tins 2004 | 003 | Secret Rare | €0.09 |
| Command PerformanceThe New Challengers · 069 | The New Challengers | 069 | Common | €0.07 |
| Commencement DanceMagic Ruler · 062 | Magic Ruler | 062 | Common | €0.03 |
| Common CharityTactical Evolution · 072 | Tactical Evolution | 072 | Rare | €0.20 |
| Common SoulPower of the Duelist · 045 | Power of the Duelist | 045 | Common | €0.10 |
| Compass TokenUnlisted Printings | Unlisted Printings | — | — | — |
| Compulsory Escape DeviceReturn of the Duelist · 074 | Return of the Duelist | 074 | Common | $0.14 |
| Compulsory Evacuation DeviceInvasion of Chaos · 103 | Invasion of Chaos | 103 | Rare | €0.08 |
| Comrade Swordsman of LandstarCrossroads of Chaos · 033 | Crossroads of Chaos | 033 | Common | €0.16 |
| ConbirdablePhantom Nightmare · 084 | Phantom Nightmare | 084 | Common | €0.03 |
| Concentrating CurrentSoul Fusion · 064 | Soul Fusion | 064 | Common | €0.05 |
| Concours de Cuisine (Culinary Confrontation)Age of Overlord · 064 | Age of Overlord | 064 | Common | €0.14 |
| Condemned DarklordDuel Overload · 006 | Duel Overload | 006 | Ultra Rare | €0.27 |
| Condemned MaidenPrimal Origin · 038 | Primal Origin | 038 | Short Print | $0.36 |
| Condemned WitchSoul Fusion · 028 | Soul Fusion | 028 | Secret Rare | €0.04 |
| Condolence PuppetIgnition Assault · 059 | Ignition Assault | 059 | Common | €0.20 |
| Conduction Warrior Linear Magnum Plus MinusBurst Protocol · 099 | Burst Protocol | 099 | Super Rare | €0.47 |
| Conduction Warrior Plasma MagnumBurst Protocol · 034 | Burst Protocol | 034 | Super Rare | €0.25 |
| Conductor of NephthysPhantom Rage · 030 | Phantom Rage | 030 | Super Rare | $0.20 |
| Confiras de NouvellesWild Survivors · 030 | Wild Survivors | 030 | Super Rare | €0.12 |
| ConfiscationMagic Ruler · 038 | Magic Ruler | 038 | Super Rare | €0.95 |
| Confronting the "C"Judgment of the Light · 086 | Judgment of the Light | 086 | Rare | €0.11 |
| Confusion ChaffCrossroads of Chaos · 064 | Crossroads of Chaos | 064 | Common | €0.02 |
| Conquistador of the Golden LandSecret Slayers · 034 | Secret Slayers | 034 | Secret Rare | €0.15 |
| ConscriptionCybernetic Revolution · 058 | Cybernetic Revolution | 058 | Common | €0.05 |
| Consecrated LightAbsolute Powerforce · 033 | Absolute Powerforce | 033 | Short Print | $6.64 |
| Consolation PrizeSoul Fusion · 081 | Soul Fusion | 081 | Rare | €0.06 |
| Constellar AcubensDuel Terminal 7b · 068 | Duel Terminal 7b | 068 | Duel Terminal Normal Parallel Rare | €0.14 |
| Constellar AldebaranDuel Terminal 7a · 019 | Duel Terminal 7a | 019 | Duel Terminal Normal Parallel Rare | €0.13 |
| Constellar AlgiediDuel Terminal 7a · 020 | Duel Terminal 7a | 020 | Duel Terminal Normal Parallel Rare | €0.20 |
| Constellar AlreschaDuel Terminal 7b · 070 | Duel Terminal 7b | 070 | Duel Terminal Normal Parallel Rare | €0.08 |
| Constellar AntaresDuel Terminal 7b · 071 | Duel Terminal 7b | 071 | Duel Terminal Rare Parallel Rare | €0.06 |
| Constellar BeltGalactic Overlord · 064 | Galactic Overlord | 064 | Common | €0.11 |
| Constellar CaduceusBlazing Vortex · 022 | Blazing Vortex | 022 | Super Rare | €0.12 |