| Mortal's ArdorThe List Tokens · DDO-19 | The List Tokens | DDO-19 | Common | €0.19 |
| Mortal's ResolveBorn of the Gods · 127 | Born of the Gods | 127 | Common | €0.11 |
| Mortal WoundVisions · 113 | Visions | 113 | Common | €0.09 |
| Mortician BeetleModern Masters 2017 · 78 | Modern Masters 2017 | 78 | Common | $1.58 |
| MortipedeRavnica: City of Guilds · 96 | Ravnica: City of Guilds | 96 | Common | €0.11 |
| Mortis DogsNew Phyrexia · 66 | New Phyrexia | 66 | Common | €0.14 |
| Mortuary MireForgotten Realms Commander · 249 | Forgotten Realms Commander | 249 | Common | €0.20 |
| Mortuary MireBattle for Zendikar · 240 | Battle for Zendikar | 240 | Common | €0.22 |
| Mortuary MireCommander 2018 · 266 | Commander 2018 | 266 | Common | €0.21 |
| Mortuary MireCommander 2019 · 260 | Commander 2019 | 260 | Common | €0.26 |
| Mortuary MireCommander 2020 · 289 | Commander 2020 | 289 | Common | €0.21 |
| Mortuary MireCommander Legends: Battle for Baldur's Gate · 900 | Commander Legends: Battle for Baldur's Gate | 900 | Common | €0.05 |
| Mortuary MireJumpstart 2022 · 817 | Jumpstart 2022 | 817 | Common | €0.22 |
| Mortuary MireMidnight Hunt Commander · 176 | Midnight Hunt Commander | 176 | Common | €0.22 |
| Mortuary MireFallout · 272 | Fallout | 272 | Common | €0.37 |
| Mortuary MireFallout · 800 | Fallout | 800 | Common | €11.72 |
| Mortus StriderGatecrash · 179 | Gatecrash | 179 | Common | €0.04 |
| Mortus StriderRavnica Remastered · 203 | Ravnica Remastered | 203 | Common | €0.04 |
| Mosquito GuardDuel Decks: Elspeth vs. Tezzeret · 6 | Duel Decks: Elspeth vs. Tezzeret | 6 | Common | €0.13 |
| Mosquito GuardMorningtide · 18 | Morningtide | 18 | Common | €0.06 |
| Mosscoat GoriakIkoria: Lair of Behemoths · 167 | Ikoria: Lair of Behemoths | 167 | Common | $0.03 |
| Moss DiamondCommander Legends: Battle for Baldur's Gate · 327 | Commander Legends: Battle for Baldur's Gate | 327 | Common | €0.11 |
| Moss DiamondCommander Legends: Battle for Baldur's Gate · 448 | Commander Legends: Battle for Baldur's Gate | 448 | Common | €0.12 |
| Moss DiamondCommander Legends · 327 | Commander Legends | 327 | Common | €0.08 |
| MossdogNemesis · 106 | Nemesis | 106 | Common | €0.07 |
| Moss KamiChampions of Kamigawa · 228 | Champions of Kamigawa | 228 | Common | €0.05 |
| Moss MonsterEighth Edition · 267 | Eighth Edition | 267 | Common | €0.03 |
| Moss MonsterEighth Edition · 267★ | Eighth Edition | 267★ | Common | $0.04 |
| Moss MonsterLegends · 195 | Legends | 195 | Common | $0.48 |
| MosstodonShards of Alara · 139 | Shards of Alara | 139 | Common | €0.07 |
| Moss ViperTheros Beyond Death · 179 | Theros Beyond Death | 179 | Common | €0.15 |
| Most Valuable SlayerDuskmourn: House of Horror · 144 | Duskmourn: House of Horror | 144 | Common | €0.02 |
| Most WantedStreets of New Capenna · 153 | Streets of New Capenna | 153 | Common | €0.04 |
| Mothdust ChangelingModern Masters · 53 | Modern Masters | 53 | Common | €0.80 |
| Mothdust ChangelingMorningtide · 42 | Morningtide | 42 | Common | €0.75 |
| Mothdust ChangelingThe List Tokens · MOR-42 | The List Tokens | MOR-42 | Common | $0.43 |
| Mother BearModern Horizons · 171 | Modern Horizons | 171 | Common | €0.18 |
| Mother BearJumpstart: Historic Horizons · 604 | Jumpstart: Historic Horizons | 604 | Common | — |
| Mother KangarooUnsanctioned · 66 | Unsanctioned | 66 | Common | €0.11 |
| Mother KangarooUnstable · 116 | Unstable | 116 | Common | €0.07 |
| Mother of GoonsUnhinged · 59 | Unhinged | 59 | Common | €0.20 |
| Mothrider PatrolKamigawa: Neon Dynasty · 30 | Kamigawa: Neon Dynasty | 30 | Common | €0.05 |
| Mothrider SamuraiChampions of Kamigawa · 34 | Champions of Kamigawa | 34 | Common | €0.08 |
| Motion SicknessUnfinity · 53 | Unfinity | 53 | Common | $0.07 |
| Motion SicknessUnfinity · 339 | Unfinity | 339 | Common | €0.37 |
| MountainUnlimited Edition · 297 | Unlimited Edition | 297 | Common | €2.13 |
| MountainUnlimited Edition · 298 | Unlimited Edition | 298 | Common | €3.02 |
| MountainUnlimited Edition · 299 | Unlimited Edition | 299 | Common | €2.76 |
| MountainRevised Edition · 301 | Revised Edition | 301 | Common | €0.38 |
| MountainRevised Edition · 302 | Revised Edition | 302 | Common | €0.46 |