| Necrotic Ooze (10 variants) | 83 |
| Necrotic Ooze (5 variants) | 441 |
| Myth Realized (10 variants) | 22 |
| Murkfiend Liege (5 variants) | 529 |
| Murkfiend Liege (10 variants) | 259 |
| Mulldrifter (10 variants) | 60 |
| Mulldrifter (10 variants) | 349 |
| Muldrotha, the Gravetide (10 variants) | 384 |
| Muldrotha, the Gravetide (10 variants) | 258 |
| Muldrotha, the Gravetide (5 variants) | 528 |
| Monastery Swiftspear (10 variants) | 362 |
| Monastery Swiftspear (10 variants) | 119 |
| Monastery Mentor (5 variants) | 420 |
| Monastery Mentor (10 variants) | 21 |
| Momentary Blink (10 variants) | 20 |
| Mizzix of the Izmagnus (10 variants) | 257 |
| Mizzix of the Izmagnus (5 variants) | 527 |
| Mistmeadow Witch (10 variants) | 256 |
| Mistfire Adept (10 variants) | 59 |
| Mindwrack Liege (10 variants) | 255 |
| Mindwrack Liege (5 variants) | 526 |
| Militia Bugler (10 variants) | 19 |
| Mikaeus, the Lunarch (10 variants) | 18 |
| Mikaeus, the Lunarch (5 variants) | 419 |
| Might of Old Krosa (10 variants) | 153 |
| Mentor of the Meek (10 variants) | 340 |
| Mentor of the Meek (10 variants) | 17 |
| Mayael's Aria (10 variants) | 253 |
| Mayael's Aria (5 variants) | 524 |
| Mathas, Fiend Seeker (5 variants) | 523 |
| Mathas, Fiend Seeker (10 variants) | 252 |
| Master of Cruelties (5 variants) | 522 |
| Master of Cruelties (10 variants) | 251 |
| Master Biomancer (5 variants) | 521 |
| Master Biomancer (10 variants) | 250 |
| Martial Glory (10 variants) | 249 |
| Marchesa, the Black Rose (10 variants) | 248 |
| Marchesa, the Black Rose (5 variants) | 520 |
| Marchesa, the Black Rose (10 variants) | 382 |
| Mana Vault (5 variants) | 560 |
| Mana Vault (10 variants) | 308 |
| Mana Vault (10 variants) | 394 |
| Mana Leak (10 variants) | 58 |
| Mana Drain (10 variants) | 57 |
| Mana Drain (10 variants) | 348 |
| Mana Drain (5 variants) | 432 |
| Makeshift Mauler (10 variants) | 56 |
| Magister Sphinx (10 variants) | 247 |
| Magister Sphinx (5 variants) | 519 |
| Lyev Skyknight (10 variants) | 246 |