| Mizzix of the IzmagnusLegendary Cube Prize Pack · 116 | Legendary Cube Prize Pack | 116 | Rare | — |
| Mizzix, Replica RiderJumpstart 2022 · 35 | Jumpstart 2022 | 35 | Rare | €0.50 |
| Mizzix's MasteryCommander 2015 · 29 | Commander 2015 | 29 | Rare | €1.50 |
| Mizzix's MasteryFinal Fantasy: Through the Ages · 41 | Final Fantasy: Through the Ages | 41 | Rare | $4.03 |
| Mizzix's MasteryOutlaws of Thunder Junction Commander · 175 | Outlaws of Thunder Junction Commander | 175 | Rare | €7.45 |
| Mizzix's MasteryRavnica Remastered · 118 | Ravnica Remastered | 118 | Rare | €5.75 |
| Mizzix's MasteryRavnica Remastered · 339 | Ravnica Remastered | 339 | Rare | $5.92 |
| Mizzix's MasteryRavnica Remastered · 339z | Ravnica Remastered | 339z | Rare | €125.13 |
| Mizzix's MasteryThe List Tokens · C15-29 | The List Tokens | C15-29 | Rare | €6.30 |
| Mizzix's MasteryLegendary Cube Prize Pack · 65 | Legendary Cube Prize Pack | 65 | Rare | — |
| Mjölnir, Storm HammerAssassin's Creed · 74 | Assassin's Creed | 74 | Rare | €2.09 |
| Mjölnir, Storm HammerAssassin's Creed · 170 | Assassin's Creed | 170 | Rare | €2.14 |
| Mjölnir, Storm HammerAssassin's Creed · 258 | Assassin's Creed | 258 | Rare | €3.06 |
| Mm'menon, the Right HandEdge of Eternities · 68 | Edge of Eternities | 68 | Rare | €0.32 |
| Mm'menon, the Right HandEdge of Eternities · 290 | Edge of Eternities | 290 | Rare | €1.12 |
| Mm'menon, the Right HandEdge of Eternities Promos · 68p | Edge of Eternities Promos | 68p | Rare | €0.26 |
| Mm'menon, the Right HandEdge of Eternities Promos · 68s | Edge of Eternities Promos | 68s | Rare | $0.57 |
| MoatLegends · 28 | Legends | 28 | Rare | €790.03 |
| MoatMasters Edition · 21 | Masters Edition | 21 | Rare | — |
| MoatMagic Online Promos · 46948 | Magic Online Promos | 46948 | Rare | — |
| Mobile CloneUnfinity · 51 | Unfinity | 51 | Rare | $0.11 |
| Mobile CloneUnfinity · 337 | Unfinity | 337 | Rare | €0.24 |
| MobilizationTenth Edition · 29 | Tenth Edition | 29 | Rare | €0.56 |
| MobilizationTenth Edition · 29★ | Tenth Edition | 29★ | Rare | €0.80 |
| MobilizationCommander 2014 · 81 | Commander 2014 | 81 | Rare | €0.30 |
| MobilizationOnslaught · 44 | Onslaught | 44 | Rare | €0.68 |
| Mobilized DistrictCommander Masters · 1011 | Commander Masters | 1011 | Rare | €0.18 |
| Mobilized DistrictDominaria United Commander · 218 | Dominaria United Commander | 218 | Rare | €0.13 |
| Mobilized DistrictWar of the Spark Promos · 249p | War of the Spark Promos | 249p | Rare | €0.20 |
| Mobilized DistrictWar of the Spark Promos · 249s | War of the Spark Promos | 249s | Rare | €0.45 |
| Mobilized DistrictWar of the Spark · 249 | War of the Spark | 249 | Rare | €0.12 |
| Mob RuleFate Reforged · 109 | Fate Reforged | 109 | Rare | $0.93 |
| Mob RuleCrimson Vow Commander · 147 | Crimson Vow Commander | 147 | Rare | $2.17 |
| Mob VerdictMurders at Karlov Manor Commander · 33 | Murders at Karlov Manor Commander | 33 | Rare | €0.15 |
| Mob VerdictMurders at Karlov Manor Commander · 343 | Murders at Karlov Manor Commander | 343 | Rare | €0.41 |
| MockingbirdBloomburrow · 61 | Bloomburrow | 61 | Rare | €3.88 |
| MockingbirdBloomburrow · 305 | Bloomburrow | 305 | Rare | $7.07 |
| MockingbirdBloomburrow Promos · 61p | Bloomburrow Promos | 61p | Rare | €2.87 |
| MockingbirdBloomburrow Promos · 61s | Bloomburrow Promos | 61s | Rare | €7.27 |
| Mocking DoppelgangerCommander Legends: Battle for Baldur's Gate · 617 | Commander Legends: Battle for Baldur's Gate | 617 | Rare | $2.60 |
| Mocking DoppelgangerCommander Legends: Battle for Baldur's Gate · 667 | Commander Legends: Battle for Baldur's Gate | 667 | Rare | $4.28 |
| Model of UnityTales of Middle-earth Commander · 78 | Tales of Middle-earth Commander | 78 | Rare | €0.17 |
| Model of UnityTales of Middle-earth Commander · 158 | Tales of Middle-earth Commander | 158 | Rare | $0.43 |
| Model of UnityTales of Middle-earth Commander · 488 | Tales of Middle-earth Commander | 488 | Rare | $0.87 |
| ModerationModern Horizons 2 · 206 | Modern Horizons 2 | 206 | Rare | €0.13 |
| ModerationModern Horizons 2 · 371 | Modern Horizons 2 | 371 | Rare | €0.20 |
| ModerationModern Horizons 2 Promos · 206s | Modern Horizons 2 Promos | 206s | Rare | $0.49 |
| M.O.D.O.K., Evil IntellectMarvel Super Heroes Commander · 509 | Marvel Super Heroes Commander | 509 | Rare | $2.27 |
| Modular MonstrosityThe List (Unfinity Foil Edition) · 59 | The List (Unfinity Foil Edition) | 59 | Rare | $0.20 |
| Modular MonstrosityUnstable · 155 | Unstable | 155 | Rare | €0.14 |