Magic: the Gathering (Cards)
| Name | Collector Number |
|---|---|
| Mahamoti Djinn (4 variants) Revised Edition | 66 |
| Mana Leak (6 variants) Iconic Masters | 66 |
| Mana Short Limited Edition Beta | 66 |
| Mana Short Collectors' Edition | 66 |
| Mana Short Unlimited Edition | 66 |
| Mana Short Intl. Collectors' Edition | 66 |
| Mass Appeal (22 variants) Avacyn Restored | 66 |
| Master of Cruelties (6 variants) RNA Guild Kit | 66 |
| Mazemind Tome // Mazemind Tome (2 variants) The Brothers' War Art Series | 66 |
| Mechanozoa (12 variants) Edge of Eternities | 66 |
| Meeting of Minds (16 variants) March of the Machine | 66 |
| Memory Lapse // Memory Lapse (2 variants) Strixhaven Art Series | 66 |
| Memory's Journey (22 variants) Innistrad | 66 |
| Merfolk Mesmerist (22 variants) Magic 2012 | 66 |
| Merfolk of the Pearl Trident 30th Anniversary Edition | 66 |
| Merfolk of the Pearl Trident Limited Edition Alpha | 66 |
| Merfolk Spy (20 variants) Magic 2011 | 66 |
| Metamorphosis Chronicles | 66 |
| Metropolis Sprite (22 variants) Core Set 2020 | 66 |
| Midnight Entourage (22 variants) Aether Revolt | 66 |
| Mighty Leap Ravnica: Clue Edition | 66 |
| Mind Maggots (9 variants) Exodus | 66 |
| Mind Shatter (18 variants) Morningtide | 66 |
| Mister Fantastic, Reed Richards (12 variants) Marvel Super Heroes | 66 |
| Moraug, Fury of Akoum // Moraug, Fury of Akoum (2 variants) Zendikar Rising Art Series | 66 |
| Mortis Dogs (20 variants) New Phyrexia | 66 |
| Mortuary (9 variants) Stronghold | 66 |
| Mother Kangaroo Unsanctioned | 66 |
| Mountain Jumpstart | 66 |
| Mountain Game Night | 66 |
| Murder of Crows (6 variants) Masters 25 | 66 |
| Mystic Retrieval (4 variants) Ultimate Masters | 66 |
| Nekrataal (9 variants) Visions | 66 |
| Nine-Lives Familiar (12 variants) Foundations | 66 |
| Nivix Barrier (22 variants) Magic Origins | 66 |
| Oaken Siren (16 variants) The Lost Caverns of Ixalan | 66 |
| Octopus Form (12 variants) Avatar: The Last Airbender | 66 |
| Ojutai Interceptor (22 variants) Dragons of Tarkir | 66 |
| Old Stickfingers // Old Stickfingers (2 variants) Midnight Hunt Art Series | 66 |
| One with the Machine (22 variants) Core Set 2019 | 66 |
| Onkel Istvan (2 variants) Renaissance | 66 |
| Opportunity (22 variants) Magic 2014 | 66 |
| Orcish Librarian (18 variants) Time Spiral Timeshifted | 66 |
| Organ Hoarder (22 variants) Innistrad: Midnight Hunt | 66 |
| Organ Hoarder (2 variants) Innistrad: Double Feature | 66 |
| Organic Extinction (6 variants) Edge of Eternities Commander | 66 |
| Out Cold (16 variants) Murders at Karlov Manor | 66 |
| Overflowing Insight (22 variants) Ixalan | 66 |
| Part Water (2 variants) Legends | 66 |
| Pegasus (2 variants) Commander Masters Tokens | 66 |