| Outflank (6 variants) | 233 |
| Orochi Merge-Keeper (6 variants) | 695 |
| Ornithopter of Paradise (6 variants) | 153 |
| Organ Hoarder (6 variants) | 340 |
| Orchard Strider (6 variants) | 694 |
| Oran-Rief Ooze (6 variants) | 693 |
| Opt (6 variants) | 339 |
| Opportunity (6 variants) | 338 |
| Open Fire (6 variants) | 583 |
| Oneirophage (6 variants) | 337 |
| Omen of the Sea (6 variants) | 336 |
| Ojutai Exemplars (6 variants) | 232 |
| Obstinate Baloth (6 variants) | 692 |
| Nyx-Fleece Ram (6 variants) | 231 |
| Nykthos Paragon (6 variants) | 230 |
| Nullpriest of Oblivion (6 variants) | 472 |
| Ninja of the Deep Hours (6 variants) | 108 |
| Nightveil Sprite (6 variants) | 335 |
| Night's Whisper (6 variants) | 471 |
| Network Disruptor (6 variants) | 334 |
| Neonate's Rush (6 variants) | 582 |
| Nef-Crop Entangler (6 variants) | 581 |
| Neerdiv, Devious Diver (6 variants) | 36 |
| Necrotic Wound (6 variants) | 470 |
| Necropolis Regent (6 variants) | 469 |
| Nazar, the Velvet Fang (6 variants) | 43 |
| Nantuko Husk (6 variants) | 468 |
| Naiad of Hidden Coves (6 variants) | 333 |
| Nadir Kraken (6 variants) | 332 |
| Naban, Dean of Iteration (6 variants) | 61 |
| Mystic Skyfish (6 variants) | 331 |
| Myr Enforcer (6 variants) | 756 |
| Muse Drake (6 variants) | 330 |
| Murmuring Mystic (6 variants) | 107 |
| Murder (6 variants) | 467 |
| Murasa Ranger (6 variants) | 691 |
| Mu Yanling, Sky Dancer (6 variants) | 329 |
| Mowu, Loyal Companion (6 variants) | 79 |
| Mountain (6 variants) | 91 |
| Mountain (6 variants) | 92 |
| Mountain (6 variants) | 90 |
| Morkrut Necropod (6 variants) | 466 |
| Morkrut Behemoth (6 variants) | 465 |
| Morbid Opportunist (6 variants) | 464 |
| Moonsnare Specialist (6 variants) | 328 |
| Moon-Circuit Hacker (6 variants) | 327 |
| Moodmark Painter (6 variants) | 463 |
| Moment of Triumph (6 variants) | 229 |
| Moment of Heroism (6 variants) | 228 |
| Moment of Craving (6 variants) | 462 |