| Master's RebukeThe List Tokens · NEO-202 | The List Tokens | NEO-202 | Common | €0.10 |
| Matca RiotersConflux · 84 | Conflux | 84 | Common | €0.07 |
| Matca RiotersModern Masters 2015 · 148 | Modern Masters 2015 | 148 | Common | €0.06 |
| Math is for Blockers (Plane)Secret Lair Showcase Planes · 7 | Secret Lair Showcase Planes | 7 | Common | €19.98 |
| Matsu-Tribe BirdstalkerSaviors of Kamigawa · 137 | Saviors of Kamigawa | 137 | Common | €0.07 |
| Matsu-Tribe DecoyChampions of Kamigawa · 227 | Champions of Kamigawa | 227 | Common | $0.13 |
| Matsu-Tribe SniperBetrayers of Kamigawa · 136 | Betrayers of Kamigawa | 136 | Common | €0.11 |
| Maulfist SquadKaladesh · 91 | Kaladesh | 91 | Common | €0.02 |
| Maulfist SquadKaladesh Remastered · 99 | Kaladesh Remastered | 99 | Common | — |
| Maul SplicerNew Phyrexia · 114 | New Phyrexia | 114 | Common | €0.15 |
| Maul SplicerMagic Online Promos · 40084 | Magic Online Promos | 40084 | Common | — |
| Maw of KozilekOath of the Gatewatch · 99 | Oath of the Gatewatch | 99 | Common | $0.07 |
| Maw of the MireInnistrad · 108 | Innistrad | 108 | Common | $0.06 |
| Maximize AltitudeGuilds of Ravnica · 43 | Guilds of Ravnica | 43 | Common | €0.05 |
| Maximize AltitudeThe List Tokens · GRN-43 | The List Tokens | GRN-43 | Common | €0.21 |
| Maximize VelocityGuilds of Ravnica · 111 | Guilds of Ravnica | 111 | Common | €0.08 |
| Maximize VelocityThe List Tokens · GRN-111 | The List Tokens | GRN-111 | Common | €0.12 |
| Maximum OverdriveAetherdrift · 96 | Aetherdrift | 96 | Common | €0.05 |
| May Civilization CollapseArchenemy Schemes · 25★ | Archenemy Schemes | 25★ | Common | €5.70 |
| Mayhem PatrolStreets of New Capenna · 114 | Streets of New Capenna | 114 | Common | €0.09 |
| May of the MachineUnknown Event · CB03 | Unknown Event | CB03 | Common | — |
| May the Mana Be with YouUnknown Event · CC03 | Unknown Event | CC03 | Common | $36.05 |
| Maze AbominationDragon's Maze · 26 | Dragon's Maze | 26 | Common | €0.07 |
| Maze BehemothDragon's Maze · 43 | Dragon's Maze | 43 | Common | €0.08 |
| Maze GliderDragon's Maze · 13 | Dragon's Maze | 13 | Common | €0.04 |
| Maze RusherDragon's Maze · 33 | Dragon's Maze | 33 | Common | €0.05 |
| Maze SentinelDragon's Maze · 4 | Dragon's Maze | 4 | Common | €0.02 |
| Maze SkullbombPhyrexia: All Will Be One · 231 | Phyrexia: All Will Be One | 231 | Common | €0.08 |
| Maze's MantlePhyrexia: All Will Be One · 174 | Phyrexia: All Will Be One | 174 | Common | €0.04 |
| Meandering RiverAmonkhet · 283 | Amonkhet | 283 | Common | €0.11 |
| Meandering RiverDominaria · 274 | Dominaria | 274 | Common | €0.10 |
| Meandering RiverGlobal Series Jiang Yanggu & Mu Yanling Tokens · 19 | Global Series Jiang Yanggu & Mu Yanling Tokens | 19 | Common | €0.10 |
| Meandering RiverKaldheim Commander · 114 | Kaldheim Commander | 114 | Common | $0.12 |
| Meandering RiverCore Set 2019 · 253 | Core Set 2019 | 253 | Common | €0.12 |
| Meandering RiverTreasure Chest · 70799 | Treasure Chest | 70799 | Common | — |
| Meat Locker // Drowned DinerDuskmourn: House of Horror · 65 | Duskmourn: House of Horror | 65 | Common | €0.10 |
| Mechanical GliderAvatar: The Last Airbender Eternal · 256 | Avatar: The Last Airbender Eternal | 256 | Common | €0.16 |
| Mechanical MobsterMarvel's Spider-Man · 168 | Marvel's Spider-Man | 168 | Common | €0.06 |
| Mechanical MobsterThrough the Omenpaths · 163 | Through the Omenpaths | 163 | Common | — |
| Mechanized Ninja CavalryTeenage Mutant Ninja Turtles · 156 | Teenage Mutant Ninja Turtles | 156 | Common | €0.08 |
| MechanozoaEdge of Eternities · 66 | Edge of Eternities | 66 | Common | €0.02 |
| Mechan ShieldmateEdge of Eternities · 65 | Edge of Eternities | 65 | Common | €0.04 |
| Medicine RunnerShadowmoor · 230 | Shadowmoor | 230 | Common | €0.09 |
| Medic's KitesailReality Fracture · 173 | Reality Fracture | 173 | Common | €0.02 |
| Meditation PoolsAvatar: The Last Airbender · 272 | Avatar: The Last Airbender | 272 | Common | €0.15 |
| Meditation PuzzleMagic 2015 · 19 | Magic 2015 | 19 | Common | €0.06 |
| Meditation PuzzleThe List Tokens · M15-19 | The List Tokens | M15-19 | Common | €0.10 |
| Meeting of MindsMarch of the Machine · 66 | March of the Machine | 66 | Common | $0.32 |
| Meeting of MindsThe List Tokens · MOM-66 | The List Tokens | MOM-66 | Common | €0.14 |
| Megaflora JungleMarch of the Machine Commander · 57 | March of the Machine Commander | 57 | Common | €0.57 |