| Metallic Rebuke | AER-39 |
| Messenger Jays | CN2-35 |
| Mesmeric Fiend | TOR-69 |
| Mesa Unicorn | DOM-27 |
| Merrow Harbinger | LRW-73 |
| Meria's Outrider | DMU-138 |
| Merfolk Trickster | DOM-56 |
| Merfolk Thaumaturgist | PLC-56 |
| Merfolk Seastalkers | ZEN-55 |
| Merfolk of the Pearl Trident | POR-60 |
| Merfolk Mistbinder | RIX-164 |
| Merfolk Looter | DDT-10 |
| Meren of Clan Nel Toth | C15-49 |
| Mercy Killing | SHM-231 |
| Mercurial Geists | EMN-186 |
| Mercurial Chemister | RTR-180 |
| Merciless Resolve | SOI-123 |
| Merciless Executioner | FRF-76 |
| Merchant of the Vale // Haggle | ELD-131 |
| Mercadia's Downfall | MMQ-205 |
| Mephitic Vapors | GRN-76 |
| Mentor of the Meek | 2X2-17 |
| Mental Note | JUD-46 |
| Memory Lapse | EMA-60 |
| Memory Erosion | CM2-45 |
| Memorial to Genius | DOM-243 |
| Memnite (2 variants) | SOM-174 |
| Melira's Keepers | MBS-83 |
| Meeting of Minds | MOM-66 |
| Meditation Puzzle | M15-19 |
| Meddling Mage | ARB-8 |
| Mechanized Production | AER-38 |
| Meandering Towershell | KTK-141 |
| Mazirek, Kraul Death Priest | 2XM-209 |
| Mazemind Tome | M21-232 |
| Maze's End | DGM-152 |
| Mayhem Devil | WAR-204 |
| Maximize Velocity | GRN-111 |
| Maximize Altitude | GRN-43 |
| Maverick Thopterist | C18-185 |
| Maverick Thopterist | DDU-50 |
| Master's Rebuke | NEO-202 |
| Master Transmuter | CON-31 |
| Master Splicer | NPH-16 |
| Master of Waves | DDT-1 |
| Master of the Wild Hunt | A25-181 |
| Master of Cruelties | DGM-82 |
| Master of Arms | WTH-20 |
| Master Decoy | TMP-29 |
| Massive Might | VOW-208 |