| Martyrs of KorlisMasters Edition IV · 20 | Masters Edition IV | 20 | Uncommon | — |
| Martyr's SoulJumpstart 2022 · 212 | Jumpstart 2022 | 212 | Common | €0.19 |
| Martyr's SoulModern Horizons · 19 | Modern Horizons | 19 | Common | €0.11 |
| Martyrs' TombApocalypse · 110 | Apocalypse | 110 | Uncommon | €0.09 |
| MarutCommander Legends: Battle for Baldur's Gate · 322 | Commander Legends: Battle for Baldur's Gate | 322 | Common | €0.09 |
| Marut // MarutBattle for Baldur's Gate Art Series · 21 | Battle for Baldur's Gate Art Series | 21 | — | — |
| Marvel Boy, Noh-VarrMarvel Super Heroes Commander · 743 | Marvel Super Heroes Commander | 743 | Uncommon | €0.12 |
| MarvelousMarvel Super Heroes Jumpstart Front Cards · 16 | Marvel Super Heroes Jumpstart Front Cards | 16 | — | — |
| Marvelous MeleeMarvel Super Heroes Commander · 549 | Marvel Super Heroes Commander | 549 | Common | €0.16 |
| Marvin, Murderous MimicDuskmourn: House of Horror · 253 | Duskmourn: House of Horror | 253 | Rare | €2.17 |
| Marvin, Murderous MimicDuskmourn: House of Horror · 367 | Duskmourn: House of Horror | 367 | Rare | €3.46 |
| Marvin, Murderous MimicDuskmourn: House of Horror Promos · 253p | Duskmourn: House of Horror Promos | 253p | Rare | €1.64 |
| Marvin, Murderous MimicDuskmourn: House of Horror Promos · 253s | Duskmourn: House of Horror Promos | 253s | Rare | €2.45 |
| Marvin, Murderous Mimic // Marvin, Murderous MimicDuskmourn: House of Horror Art Series · 45 | Duskmourn: House of Horror Art Series | 45 | — | €0.56 |
| Marvo, Deep OperativeMurders at Karlov Manor Commander · 7 | Murders at Karlov Manor Commander | 7 | Mythic Rare | $0.48 |
| Marvo, Deep OperativeMurders at Karlov Manor Commander · 315 | Murders at Karlov Manor Commander | 315 | Mythic Rare | €1.12 |
| Marwyn's KindredAlchemy: Dominaria · 16 | Alchemy: Dominaria | 16 | Mythic Rare | — |
| Marwyn, the ClearcutterReality Fracture · 249 | Reality Fracture | 249 | Uncommon | €0.08 |
| Marwyn, the ClearcutterReality Fracture · 310 | Reality Fracture | 310 | Uncommon | €0.18 |
| Marwyn, the NurturerDominaria · 172 | Dominaria | 172 | Rare | €5.02 |
| Marwyn, the NurturerKaldheim Commander · 68 | Kaldheim Commander | 68 | Rare | €2.22 |
| Marwyn, the NurturerFoundations Jumpstart · 687 | Foundations Jumpstart | 687 | Rare | €5.81 |
| Marwyn, the NurturerDominaria Promos · 172p | Dominaria Promos | 172p | Rare | €5.06 |
| Marwyn, the NurturerDominaria Promos · 172s | Dominaria Promos | 172s | Rare | €7.69 |
| Marwyn, the NurturerSecret Lair Drop Tokens · 1960 | Secret Lair Drop Tokens | 1960 | Rare | $23.31 |
| Marwyn, the PreserverReality Fracture · 263 | Reality Fracture | 263 | Uncommon | €0.19 |
| Marwyn, the PreserverReality Fracture · 315 | Reality Fracture | 315 | Uncommon | €0.56 |
| Mary Jane WatsonMarvel's Spider-Man Promos · 134s | Marvel's Spider-Man Promos | 134s | Rare | €0.63 |
| Mary Jane WatsonWizards Play Network 2025 · 11 | Wizards Play Network 2025 | 11 | Rare | €0.20 |
| Mary Jane WatsonMarvel's Spider-Man · 134 | Marvel's Spider-Man | 134 | Rare | €0.25 |
| Mary Jane WatsonMarvel's Spider-Man · 229 | Marvel's Spider-Man | 229 | Rare | €0.25 |
| Mary Jane WatsonThrough the Omenpaths · 132 | Through the Omenpaths | 132 | Rare | — |
| Mary Jane Watson // Mary Jane WatsonMarvel's Spider-Man Art Series · 50 | Marvel's Spider-Man Art Series | 50 | — | — |
| Mary O'KillThe List (Unfinity Foil Edition) · 50 | The List (Unfinity Foil Edition) | 50 | Rare | $0.16 |
| Mary O'KillUnstable · 138 | Unstable | 138 | Rare | €0.10 |
| Mary Read and Anne BonnyAssassin's Creed · 61 | Assassin's Creed | 61 | Rare | $0.47 |
| Mary Read and Anne BonnyAssassin's Creed · 120 | Assassin's Creed | 120 | Rare | €2.56 |
| Mary Read and Anne BonnyAssassin's Creed · 120z | Assassin's Creed | 120z | Rare | €315.63 |
| Mary Read and Anne BonnyAssassin's Creed · 242 | Assassin's Creed | 242 | Rare | €0.88 |
| Mary Read and Anne Bonny // Mary Read and Anne BonnyAssassin's Creed Art Series · 7 | Assassin's Creed Art Series | 7 | — | — |
| Masako the HumorlessChampions of Kamigawa · 33 | Champions of Kamigawa | 33 | Rare | €6.21 |
| Masako the HumorlessThe List Tokens · CHK-33 | The List Tokens | CHK-33 | Rare | €3.72 |
| Mascot ExhibitionStrixhaven: School of Mages Promos · 5p | Strixhaven: School of Mages Promos | 5p | Mythic Rare | €1.04 |
| Mascot ExhibitionStrixhaven: School of Mages Promos · 5s | Strixhaven: School of Mages Promos | 5s | Mythic Rare | €1.92 |
| Mascot ExhibitionStrixhaven: School of Mages · 5 | Strixhaven: School of Mages | 5 | Mythic Rare | $0.61 |
| Mascot ExhibitionStrixhaven: School of Mages · 285 | Strixhaven: School of Mages | 285 | Mythic Rare | €1.71 |
| Mascot ExhibitionMagic Online Promos · 90342 | Magic Online Promos | 90342 | Mythic Rare | — |
| Mascot InterceptionStrixhaven: School of Mages · 110 | Strixhaven: School of Mages | 110 | Uncommon | €0.04 |
| MaskCommander 2018 Tokens · 4 | Commander 2018 Tokens | 4 | — | €0.20 |
| Masked AdmirersCommander 2014 · 206 | Commander 2014 | 206 | Rare | €0.15 |