| Master the WayKhans of Tarkir · 188 | Khans of Tarkir | 188 | Uncommon | €0.06 |
| Master ThiefMagic 2012 · 64 | Magic 2012 | 64 | Uncommon | €0.15 |
| Master ThiefZendikar Rising Commander · 30 | Zendikar Rising Commander | 30 | Uncommon | €0.10 |
| Match the OddsAvatar: The Last Airbender Eternal · 253 | Avatar: The Last Airbender Eternal | 253 | Uncommon | $0.21 |
| Matopi GolemVisions · 150 | Visions | 150 | Uncommon | $0.15 |
| Matterbending MageSecrets of Strixhaven · 59 | Secrets of Strixhaven | 59 | Uncommon | €0.05 |
| Mauhúr, Uruk-hai CaptainThe Lord of the Rings: Tales of Middle-earth · 214 | The Lord of the Rings: Tales of Middle-earth | 214 | Uncommon | €0.13 |
| Mauhúr, Uruk-hai CaptainThe Lord of the Rings: Tales of Middle-earth · 665 | The Lord of the Rings: Tales of Middle-earth | 665 | Uncommon | €0.38 |
| Maulfist DoorbusterKaladesh · 123 | Kaladesh | 123 | Uncommon | €0.06 |
| Maulfist RevolutionaryAether Revolt · 115 | Aether Revolt | 115 | Uncommon | $0.05 |
| Maulfist RevolutionaryKaladesh Remastered · 168 | Kaladesh Remastered | 168 | Uncommon | — |
| Mausoleum GuardDuel Decks: Sorin vs. Tibalt · 13 | Duel Decks: Sorin vs. Tibalt | 13 | Uncommon | $0.11 |
| Mausoleum GuardInnistrad Remastered · 33 | Innistrad Remastered | 33 | Uncommon | €0.10 |
| Mausoleum GuardInnistrad · 20 | Innistrad | 20 | Uncommon | €0.05 |
| Mausoleum GuardJumpstart 2022 · 213 | Jumpstart 2022 | 213 | Uncommon | €0.08 |
| Mausoleum HarpyRivals of Ixalan · 78 | Rivals of Ixalan | 78 | Uncommon | €0.04 |
| Mausoleum TurnkeyRavnica: Clue Edition · 116 | Ravnica: Clue Edition | 116 | Uncommon | $0.11 |
| Mausoleum TurnkeyConspiracy: Take the Crown · 142 | Conspiracy: Take the Crown | 142 | Uncommon | €0.03 |
| Mausoleum TurnkeyJumpstart · 255 | Jumpstart | 255 | Uncommon | €0.07 |
| Mausoleum TurnkeyRavnica: City of Guilds · 94 | Ravnica: City of Guilds | 94 | Uncommon | $0.08 |
| Mausoleum TurnkeyRavnica Remastered · 84 | Ravnica Remastered | 84 | Uncommon | €0.03 |
| Maverick ThopteristAether Revolt · 130 | Aether Revolt | 130 | Uncommon | €0.14 |
| Maverick ThopteristCommander 2018 · 185 | Commander 2018 | 185 | Uncommon | €0.10 |
| Maverick ThopteristDuel Decks: Elves vs. Inventors · 50 | Duel Decks: Elves vs. Inventors | 50 | Uncommon | €0.08 |
| Maverick ThopteristThe List Tokens · DDU-50 | The List Tokens | DDU-50 | Uncommon | €0.16 |
| Maverick ThopteristThe List Tokens · C18-185 | The List Tokens | C18-185 | Uncommon | €0.17 |
| Maverick ThopteristKaladesh Remastered · 199 | Kaladesh Remastered | 199 | Uncommon | — |
| Maw of the ObzedatDragon's Maze · 83 | Dragon's Maze | 83 | Uncommon | €0.11 |
| Mayhem DevilDuskmourn: House of Horror Commander · 225 | Duskmourn: House of Horror Commander | 225 | Uncommon | €0.52 |
| Mayhem DevilEdge of Eternities Commander · 121 | Edge of Eternities Commander | 121 | Uncommon | $0.36 |
| Mayhem DevilRavnica Remastered · 199 | Ravnica Remastered | 199 | Uncommon | €0.47 |
| Mayhem DevilRavnica Remastered · 374 | Ravnica Remastered | 374 | Uncommon | $0.70 |
| Mayhem DevilThe List Tokens · WAR-204 | The List Tokens | WAR-204 | Uncommon | $0.31 |
| Mayhem DevilWar of the Spark · 204 | War of the Spark | 204 | Uncommon | €0.33 |
| Maze of IthThe Dark · 117 | The Dark | 117 | Uncommon | €19.14 |
| Maze of ShadowsTempest · 319 | Tempest | 319 | Uncommon | $0.26 |
| Maze of ShadowsTempest Remastered · 238 | Tempest Remastered | 238 | Uncommon | — |
| MeadowboonModern Masters · 22 | Modern Masters | 22 | Uncommon | $0.17 |
| MeadowboonMorningtide · 17 | Morningtide | 17 | Uncommon | €0.15 |
| Meandering RiverCommander 2018 · 265 | Commander 2018 | 265 | Uncommon | €0.10 |
| Meandering RiverOath of the Gatewatch · 173 | Oath of the Gatewatch | 173 | Uncommon | €0.05 |
| Meandering RiverStarter Commander Decks · 308 | Starter Commander Decks | 308 | Uncommon | €0.12 |
| Meanders GuideLorwyn Eclipsed · 25 | Lorwyn Eclipsed | 25 | Uncommon | €0.06 |
| Measure of WickednessSaviors of Kamigawa · 82 | Saviors of Kamigawa | 82 | Uncommon | €0.18 |
| Mechan AssemblerEdge of Eternities · 63 | Edge of Eternities | 63 | Uncommon | €0.14 |
| Mechan NavigatorEdge of Eternities · 64 | Edge of Eternities | 64 | Uncommon | €0.09 |
| Mech HangarKamigawa: Neon Dynasty · 270 | Kamigawa: Neon Dynasty | 270 | Uncommon | €0.26 |
| MeddleMirage · 73 | Mirage | 73 | Uncommon | $0.20 |
| MeddleOnslaught · 92 | Onslaught | 92 | Uncommon | €0.08 |
| Meddling YouthsMurders at Karlov Manor · 219 | Murders at Karlov Manor | 219 | Uncommon | €0.05 |