| Mardu Warshrieker | KTK-117 |
| Marisi, Breaker of the Coil | C19-46 |
| Mark of Mutiny | PCA-47 |
| Mark of the Vampire | UMA-105 |
| Marked by Honor | M15-17 |
| Markov Baron | MAT-14 |
| Maro | 8ED-264 |
| Marrow-Gnawer | CHK-124 |
| Marsh Flitter | LRW-125 |
| Marsh Hulk | DTK-109 |
| Martial Glory | GK1-91 |
| Martyr's Bond | CMD-19 |
| Martyr's Cause | ULG-13 |
| Mask of Memory | C14-249 |
| Masked Admirers | MMA-154 |
| Masked Vandal | KHM-184 |
| Maskwood Nexus | KHM-240 |
| Mass Hysteria | MRD-99 |
| Mass Polymorph | M11-64 |
| Massacre | NEM-58 |
| Massive Might | VOW-208 |
| Master Decoy | TMP-29 |
| Master of Arms | WTH-20 |
| Master of Cruelties | DGM-82 |
| Master of the Wild Hunt | A25-181 |
| Master of Waves | DDT-1 |
| Master Splicer | NPH-16 |
| Master Transmuter | CON-31 |
| Master's Rebuke | NEO-202 |
| Maverick Thopterist | C18-185 |
| Maverick Thopterist | DDU-50 |
| Maximize Altitude | GRN-43 |
| Maximize Velocity | GRN-111 |
| Mayhem Devil | WAR-204 |
| Maze's End | DGM-152 |
| Mazemind Tome | M21-232 |
| Mazirek, Kraul Death Priest | 2XM-209 |
| Meandering Towershell | KTK-141 |
| Mechanized Production | AER-38 |
| Meddling Mage | ARB-8 |
| Meditation Puzzle | M15-19 |
| Meeting of Minds | MOM-66 |
| Melira's Keepers | MBS-83 |
| Memnite (2 variants) | SOM-174 |
| Memorial to Genius | DOM-243 |
| Memory Erosion | CM2-45 |
| Memory Lapse | EMA-60 |
| Mental Note | JUD-46 |
| Mentor of the Meek | 2X2-17 |
| Mephitic Vapors | GRN-76 |