| Me, the ImmortalDoctor Who · 1021 | Doctor Who | 1021 | Rare | €3.01 |
| Methods of the MightyMarvel Super Heroes Commander · 21 | Marvel Super Heroes Commander | 21 | Rare | €0.25 |
| Methods of the MightyMarvel Super Heroes Commander · 315 | Marvel Super Heroes Commander | 315 | Rare | €0.69 |
| Meticulous ArchiveMurders at Karlov Manor · 264 | Murders at Karlov Manor | 264 | Rare | €14.21 |
| Meticulous ArchiveMurders at Karlov Manor · 328 | Murders at Karlov Manor | 328 | Rare | $16.61 |
| Meticulous ArchiveMurders at Karlov Manor Promos · 264p | Murders at Karlov Manor Promos | 264p | Rare | €14.53 |
| Meticulous ArchiveMurders at Karlov Manor Promos · 264s | Murders at Karlov Manor Promos | 264s | Rare | $19.78 |
| Meticulous ArtisanTarkir: Dragonstorm · 112 | Tarkir: Dragonstorm | 112 | Common | €0.05 |
| Meticulous CommonsReality Fracture · 184 | Reality Fracture | 184 | Common | €0.06 |
| Meticulous ExcavationThe Brothers' War · 16 | The Brothers' War | 16 | Uncommon | €0.14 |
| MetrognomeUrza's Saga · 301 | Urza's Saga | 301 | Rare | $0.48 |
| Metropolis AngelStreets of New Capenna · 203 | Streets of New Capenna | 203 | Uncommon | €0.14 |
| Metropolis ReformerMarch of the Machine: The Aftermath · 4 | March of the Machine: The Aftermath | 4 | Rare | €1.32 |
| Metropolis ReformerMarch of the Machine: The Aftermath · 54 | March of the Machine: The Aftermath | 54 | Rare | €1.71 |
| Metropolis ReformerMarch of the Machine: The Aftermath · 104 | March of the Machine: The Aftermath | 104 | Rare | $1.57 |
| Metropolis ReformerMarch of the Machine: The Aftermath · 152 | March of the Machine: The Aftermath | 152 | Rare | €2.11 |
| Metropolis ReformerMarch of the Machine: The Aftermath · 189 | March of the Machine: The Aftermath | 189 | Rare | €4.46 |
| Metropolis ReformerMarch of the Machine: The Aftermath Promos · 4p | March of the Machine: The Aftermath Promos | 4p | Rare | €1.38 |
| Metropolis ReformerFoundations Commander · 40 | Foundations Commander | 40 | Rare | $0.32 |
| Metropolis SpriteGatecrash · 42 | Gatecrash | 42 | Common | €0.04 |
| Metropolis SpriteCore Set 2020 · 66 | Core Set 2020 | 66 | Common | €0.05 |
| Metropolis SpriteThe List Tokens · M20-66 | The List Tokens | M20-66 | Common | — |
| Mezzio MuggerNew Capenna Commander · 49 | New Capenna Commander | 49 | Rare | $0.36 |
| Mezzio MuggerNew Capenna Commander · 149 | New Capenna Commander | 149 | Rare | €0.62 |
| Mezzio MuggerNew Capenna Commander Promos · 49p | New Capenna Commander Promos | 49p | Rare | €0.50 |
| Mezzio MuggerMagic Online Promos · 99935 | Magic Online Promos | 99935 | Rare | — |
| Miara, Thorn of the GladeCommander Legends · 133 | Commander Legends | 133 | Uncommon | €0.19 |
| Miara, Thorn of the GladeCommander Legends · 566 | Commander Legends | 566 | Uncommon | €0.43 |
| Miara, Thorn of the GladeKaldheim Commander · 51 | Kaldheim Commander | 51 | Uncommon | €0.10 |
| Miara, Thorn of the GladeMagic Online Promos · 86268 | Magic Online Promos | 86268 | Uncommon | — |
| Miasma DemonDuskmourn: House of Horror · 109 | Duskmourn: House of Horror | 109 | Uncommon | €0.08 |
| Miasmic MummyAmonkhet · 100 | Amonkhet | 100 | Common | $0.07 |
| Miasmic MummyJumpstart · 256 | Jumpstart | 256 | Common | €0.13 |
| Miasmic MummyThe List Tokens · AKH-100 | The List Tokens | AKH-100 | Common | €0.12 |
| Miasmic MummyAmonkhet Remastered · 116 | Amonkhet Remastered | 116 | Common | — |
| Miasmic MummyArena New Player Experience Extras · 29 | Arena New Player Experience Extras | 29 | Common | — |
| Mica, Reader of RuinsSecrets of Strixhaven · 124 | Secrets of Strixhaven | 124 | Uncommon | €0.12 |
| MichelangeloTeenage Mutant Ninja Turtles Eternal Front Cards · 4 | Teenage Mutant Ninja Turtles Eternal Front Cards | 4 | — | — |
| Michelangelo, Game MasterTeenage Mutant Ninja Turtles · 118 | Teenage Mutant Ninja Turtles | 118 | Common | €0.04 |
| Michelangelo, Game Master // Michelangelo, Game MasterTeenage Mutant Ninja Turtles Art Series · 13 | Teenage Mutant Ninja Turtles Art Series | 13 | — | — |
| Michelangelo, ImproviserTeenage Mutant Ninja Turtles · 119 | Teenage Mutant Ninja Turtles | 119 | Mythic Rare | $2.01 |
| Michelangelo, ImproviserTeenage Mutant Ninja Turtles · 219 | Teenage Mutant Ninja Turtles | 219 | Mythic Rare | €4.81 |
| Michelangelo, ImproviserTeenage Mutant Ninja Turtles · 304 | Teenage Mutant Ninja Turtles | 304 | Mythic Rare | €2,203.24 |
| Michelangelo, Mutant BFFTeenage Mutant Ninja Turtles · 120 | Teenage Mutant Ninja Turtles | 120 | Uncommon | €0.12 |
| Michelangelo, Mutant BFFTeenage Mutant Ninja Turtles · 198 | Teenage Mutant Ninja Turtles | 198 | Uncommon | €0.13 |
| Michelangelo, On the SceneTeenage Mutant Ninja Turtles Eternal · 124 | Teenage Mutant Ninja Turtles Eternal | 124 | Mythic Rare | $0.59 |
| Michelangelo, On the Scene // Michelangelo, On the SceneTeenage Mutant Ninja Turtles Art Series · 49 | Teenage Mutant Ninja Turtles Art Series | 49 | — | — |
| Michelangelo's TechniqueTeenage Mutant Ninja Turtles · 122 | Teenage Mutant Ninja Turtles | 122 | Rare | €0.31 |
| Michelangelo's TechniqueTeenage Mutant Ninja Turtles · 239 | Teenage Mutant Ninja Turtles | 239 | Rare | €0.42 |
| Michelangelo, the HeartTeenage Mutant Ninja Turtles Eternal · 5 | Teenage Mutant Ninja Turtles Eternal | 5 | Mythic Rare | €0.62 |