| 4+ | Maze of Shadows | MTGTMP_319 |
| 4+ | Maze Rusher | MTGDragonsMaze_033 |
| 4+ | Maze Sentinel | MTGDragonsMaze_004 |
| 1 | Maze's End | MTGDragonsMaze_152 |
| 4+ | Maze's End (FOIL) Prerelease | MTGDragonsMaze_152P |
| 1 | Mazemind Tome | MTGCore Set 2021_232 |
| 1 | Mazemind Tome (FOIL) | MTGCore Set 2021_232F |
| 1 | Mazzy, Truesword Paladin (Foil Etched) | MTGCLB_541 |
| 4+ | Me, the Immortal | MTGWHO_147 |
| 4+ | Meadowboon | MTGMorningtide_017 |
| 4+ | Meadowboon | MTGModernMasters_022 |
| 1 | Meadowboon (Foil) | MTGModernMasters_022F |
| 2 | Meandering River | MTGCommander2018_265 |
| 4+ | Meandering River | MTGKHC_114 |
| 4+ | Meandering River | MTGSCD_308 |
| 2 | Meandering River (Deck Builder's Toolkit) | MTGAmonkhet_283 |
| 4+ | Meandering Towershell | MTGKhansofTarkir_141 |
| 4+ | Measure of Wickedness | MTGSaviors_082 |
| 2 | Measure of Wickedness FOIL | MTGSaviors_082F |
| 4+ | Mech Hangar | MTGNEO_270 |
| 1 | Mechanized Production | MTGMKC_109 |
| 4+ | Meddle | MTGOnslaught_092 |
| 4+ | Meddle | MTGMIR_073 |
| 1 | Meddle Foil | MTGOnslaught_092F |
| 4+ | Meddling Kids | MTGUnhinged_118 |
| 1 | Meddling Mage | MTGPlaneshift_116 |
| 1 | Meddling Mage | MTGDoubleMasters_210 |
| 1 | Meddling Mage (Foil) (Borderless) | MTGDoubleMasters_355F |
| 4+ | Medicine Bag | MTGExodus_133 |
| 4+ | Medicine Runner | MTGShadowmoor_230 |
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