| Oblivion Strike | OGW-75 |
| Oblivion Ring | LRW-34 |
| Obliterate | INV-156 |
| Obelisk Spider | HOU-141 |
| Ob Nixilis, the Fallen | IMA-101 |
| Oathsworn Giant | RAV-27 |
| Oath of Scholars | EXO-42 |
| Oath of Nissa | OGW-140 |
| Oath of Lieges | EXO-11 |
| Oakhame Adversary | ELD-167 |
| Oakgnarl Warrior | DDR-15 |
| Oaken Brawler | LRW-33 |
| O-Naginata | SOK-157 |
| Nyx-Fleece Ram | A25-26 |
| Nyx Weaver | JOU-153 |
| Nylea's Presence | THS-169 |
| Nylea, God of the Hunt | THS-166 |
| Nykthos, Shrine to Nyx | THS-223 |
| Nykthos Paragon | MH2-22 |
| Nut Collector | ODY-259 |
| Nullhide Ferox | GRN-138 |
| Nuisance Engine | HOP-121 |
| Nucklavee | DDS-26 |
| Noxious Toad | POR-104 |
| Noxious Revival | NPH-118 |
| Noxious Ghoul | LGN-77 |
| Noxious Dragon | FRF-77 |
| Novice Knight | M19-30 |
| Nova Cleric | ONS-45 |
| Not of This World | ROE-8 |
| Norwood Archers | P02-136 |
| Norn's Annex | NPH-17 |
| Norin the Wary | TSP-171 |
| Noose Constrictor | EMN-164 |
| Nomad Outpost | DMC-222 |
| Nomad Mythmaker | 10E-30 |
| Noggle Hedge-Mage | EVE-108 |
| Noggle Bandit | EVE-106 |
| Noble Purpose | MMQ-32 |
| Noble Hierarch | MM2-151 |
| Noble Benefactor | WTH-44 |
| No Rest for the Wicked | 10E-165 |
| Nivix, Aerie of the Firemind | DDJ-36 |
| Niv-Mizzet, Parun | GRN-192 |
| Niv-Mizzet Reborn | WAR-208 |
| Nissa's Judgment | DDU-21 |
| Nissa, Voice of Zendikar | OGW-138 |
| Nissa, Vastwood Seer // Nissa, Sage Animist | ORI-189 |
| Nissa Revane | ZEN-170 |
| Nirkana Cutthroat | ROE-119 |