| Morbid OpportunistBloomburrow Commander · 183 | Bloomburrow Commander | 183 | Uncommon | €0.28 |
| Morbid OpportunistInnistrad: Double Feature · 113 | Innistrad: Double Feature | 113 | Uncommon | €1.17 |
| Morbid OpportunistDuskmourn: House of Horror Commander · 148 | Duskmourn: House of Horror Commander | 148 | Uncommon | €0.33 |
| Morbid OpportunistFinal Fantasy Commander · 278 | Final Fantasy Commander | 278 | Uncommon | $0.23 |
| Morbid OpportunistInnistrad Remastered · 124 | Innistrad Remastered | 124 | Uncommon | €0.25 |
| Morbid OpportunistInnistrad Remastered · 388 | Innistrad Remastered | 388 | Uncommon | €1.05 |
| Morbid OpportunistFoundations Jumpstart · 464 | Foundations Jumpstart | 464 | Uncommon | €0.20 |
| Morbid OpportunistInnistrad: Midnight Hunt · 113 | Innistrad: Midnight Hunt | 113 | Uncommon | $0.36 |
| Morbid OpportunistOutlaws of Thunder Junction Commander · 142 | Outlaws of Thunder Junction Commander | 142 | Uncommon | €0.29 |
| Morbid OpportunistFallout · 186 | Fallout | 186 | Uncommon | €0.28 |
| Morbid OpportunistFallout · 714 | Fallout | 714 | Uncommon | €8.56 |
| Morbid OpportunistThe List Tokens · MID-113 | The List Tokens | MID-113 | Uncommon | $0.20 |
| Morbid OpportunistSecrets of Strixhaven Commander · 219 | Secrets of Strixhaven Commander | 219 | Uncommon | €0.35 |
| Morbid OpportunistSpecial Guests · 32 | Special Guests | 32 | Mythic Rare | €11.49 |
| Morbid OpportunistTarkir: Dragonstorm Commander · 188 | Tarkir: Dragonstorm Commander | 188 | Uncommon | €0.10 |
| Morbid PlunderMirrodin Besieged · 47 | Mirrodin Besieged | 47 | Common | €0.11 |
| Morbid PlunderDuel Decks: Mirrodin Pure vs. New Phyrexia · 72 | Duel Decks: Mirrodin Pure vs. New Phyrexia | 72 | Common | — |
| Morbius the Living VampireMarvel's Spider-Man · 137 | Marvel's Spider-Man | 137 | Uncommon | €0.08 |
| Morbius the Living VampireThrough the Omenpaths · 156 | Through the Omenpaths | 156 | Uncommon | — |
| Morcant's EyesLorwyn Eclipsed · 185 | Lorwyn Eclipsed | 185 | Uncommon | €0.18 |
| Morcant's LoyalistLorwyn Eclipsed · 236 | Lorwyn Eclipsed | 236 | Uncommon | €0.24 |
| Morcant's LoyalistLorwyn Eclipsed · 341 | Lorwyn Eclipsed | 341 | Uncommon | €0.27 |
| Mordant DragonDuel Decks: Knights vs. Dragons · 58 | Duel Decks: Knights vs. Dragons | 58 | Rare | €0.21 |
| Mordant DragonStarter Commander Decks · 152 | Starter Commander Decks | 152 | Rare | $0.17 |
| Mordant DragonWorldwake · 85 | Worldwake | 85 | Rare | €0.33 |
| MordenkainenAdventures in the Forgotten Realms · 64 | Adventures in the Forgotten Realms | 64 | Mythic Rare | $1.45 |
| MordenkainenAdventures in the Forgotten Realms · 283 | Adventures in the Forgotten Realms | 283 | Mythic Rare | $1.49 |
| MordenkainenAdventures in the Forgotten Realms Promos · 64a | Adventures in the Forgotten Realms Promos | 64a | Mythic Rare | €0.02 |
| MordenkainenAdventures in the Forgotten Realms Promos · 64p | Adventures in the Forgotten Realms Promos | 64p | Mythic Rare | €2.35 |
| MordenkainenAdventures in the Forgotten Realms Promos · 64s | Adventures in the Forgotten Realms Promos | 64s | Mythic Rare | $2.64 |
| MordenkainenMagic Online Promos · 92656 | Magic Online Promos | 92656 | Mythic Rare | — |
| Mordenkainen EmblemAdventures in the Forgotten Realms Tokens · 18 | Adventures in the Forgotten Realms Tokens | 18 | — | $0.35 |
| Mordenkainen // MordenkainenAdventures in the Forgotten Realms Art Series · 75 | Adventures in the Forgotten Realms Art Series | 75 | — | — |
| Mordenkainen's PolymorphAdventures in the Forgotten Realms · 65 | Adventures in the Forgotten Realms | 65 | Common | €0.04 |
| MordorTales of Middle-earth Front Cards · 3 | Tales of Middle-earth Front Cards | 3 | — | — |
| Mordor MusterThe Lord of the Rings: Tales of Middle-earth · 96 | The Lord of the Rings: Tales of Middle-earth | 96 | Common | €0.07 |
| Mordor MusterThe Lord of the Rings: Tales of Middle-earth · 547 | The Lord of the Rings: Tales of Middle-earth | 547 | Common | €0.42 |
| Mordor on the MarchTales of Middle-earth Commander · 512 | Tales of Middle-earth Commander | 512 | Rare | €0.36 |
| Mordor on the MarchTales of Middle-earth Commander · 556 | Tales of Middle-earth Commander | 556 | Rare | €2.54 |
| Mordor on the March // Mordor on the MarchTales of Middle-earth Scene Box · 22 | Tales of Middle-earth Scene Box | 22 | — | $0.26 |
| Mordor TrebuchetThe Lord of the Rings: Tales of Middle-earth · 97 | The Lord of the Rings: Tales of Middle-earth | 97 | Common | €0.05 |
| Mordor TrebuchetThe Lord of the Rings: Tales of Middle-earth · 548 | The Lord of the Rings: Tales of Middle-earth | 548 | Common | €0.27 |
| More of That Strange Oil...Unknown Event · CU13 | Unknown Event | CU13 | Common | — |
| More or LessUnstable · 40 | Unstable | 40 | Uncommon | €0.12 |
| Morgue BurstDragon's Maze · 86 | Dragon's Maze | 86 | Common | $0.03 |
| Morgue TheftOdyssey · 151 | Odyssey | 151 | Common | €0.12 |
| Morgue ThrullStronghold · 65 | Stronghold | 65 | Common | $0.12 |
| Morgue ToadDuel Decks: Ajani vs. Nicol Bolas · 47 | Duel Decks: Ajani vs. Nicol Bolas | 47 | Common | $0.10 |
| Morgue ToadPlaneshift · 46 | Planeshift | 46 | Common | €0.07 |
| Morgul-Knife WoundThe Lord of the Rings: Tales of Middle-earth · 98 | The Lord of the Rings: Tales of Middle-earth | 98 | Common | €0.05 |