| Mountain ValleyVintage Masters · 306 | Vintage Masters | 306 | Uncommon | — |
| Mountain YetiChronicles Foreign Black Border · 53 | Chronicles Foreign Black Border | 53 | Common | €0.46 |
| Mountain YetiChronicles · 53 | Chronicles | 53 | Common | €0.10 |
| Mountain YetiLegends · 159 | Legends | 159 | Uncommon | $2.92 |
| Mountain YetiMasters Edition · 105 | Masters Edition | 105 | Common | — |
| Mount DoomThe Lord of the Rings: Tales of Middle-earth · 258 | The Lord of the Rings: Tales of Middle-earth | 258 | Mythic Rare | $6.54 |
| Mount DoomThe Lord of the Rings: Tales of Middle-earth · 343 | The Lord of the Rings: Tales of Middle-earth | 343 | Mythic Rare | $7.63 |
| Mount DoomThe Lord of the Rings: Tales of Middle-earth · 709 | The Lord of the Rings: Tales of Middle-earth | 709 | Mythic Rare | €23.26 |
| Mount DoomThe Lord of the Rings: Tales of Middle-earth · 750 | The Lord of the Rings: Tales of Middle-earth | 750 | Mythic Rare | $232.88 |
| Mount DoomThe Lord of the Rings: Tales of Middle-earth · 750z | The Lord of the Rings: Tales of Middle-earth | 750z | Mythic Rare | €4,117.99 |
| Mount DoomThe Lord of the Rings: Tales of Middle-earth · 754 | The Lord of the Rings: Tales of Middle-earth | 754 | Mythic Rare | $67.10 |
| Mount DoomTales of Middle-earth Promos · 258s | Tales of Middle-earth Promos | 258s | Mythic Rare | €16.68 |
| Mount DoomThe Hobbit Eternal · 50 | The Hobbit Eternal | 50 | Mythic Rare | $8.86 |
| Mount DoomThe Hobbit Eternal · 90 | The Hobbit Eternal | 90 | Mythic Rare | $29.92 |
| Mounted ArchersTempest · 30 | Tempest | 30 | Common | $0.09 |
| Mounted ArchersTempest Remastered · 19 | Tempest Remastered | 19 | Common | — |
| Mounted DreadknightInnistrad: Double Feature · 150 | Innistrad: Double Feature | 150 | Common | €0.08 |
| Mounted DreadknightInnistrad: Midnight Hunt · 150 | Innistrad: Midnight Hunt | 150 | Common | €0.02 |
| Mount KeraliaPlanechase 2012 Planes · 25 | Planechase 2012 Planes | 25 | Common | €0.57 |
| Mount KeraliaPlanechase Anthology Planes · 52 | Planechase Anthology Planes | 52 | Common | €0.15 |
| Mount Velus ManticoreModern Horizons 2 · 136 | Modern Horizons 2 | 136 | Common | €0.03 |
| Mourner's ShieldMirrodin · 209 | Mirrodin | 209 | Uncommon | €0.06 |
| Mourner's SurpriseOutlaws of Thunder Junction · 94 | Outlaws of Thunder Junction | 94 | Common | €0.11 |
| Mournful ZombieApocalypse · 43 | Apocalypse | 43 | Common | €0.06 |
| MourningInvasion · 111 | Invasion | 111 | Common | €0.17 |
| Mourning Patrol // Morning ApparitionInnistrad: Double Feature · 28 | Innistrad: Double Feature | 28 | Common | €0.07 |
| Mourning Patrol // Morning ApparitionInnistrad: Midnight Hunt · 28 | Innistrad: Midnight Hunt | 28 | Common | $0.05 |
| Mourning ThrullGuildpact · 146 | Guildpact | 146 | Common | €0.06 |
| Mourning ThrullRavnica Remastered · 204 | Ravnica Remastered | 204 | Common | €0.06 |
| MournwhelkLorwyn · 127 | Lorwyn | 127 | Common | €0.17 |
| MournwillowEldritch Moon · 187 | Eldritch Moon | 187 | Uncommon | €0.04 |
| MournwillowShadows over Innistrad Remastered · 237 | Shadows over Innistrad Remastered | 237 | Uncommon | — |
| MouseThrone of Eldraine Tokens · 4 | Throne of Eldraine Tokens | 4 | — | €0.10 |
| MouseWilds of Eldraine Tokens · 4 | Wilds of Eldraine Tokens | 4 | — | €0.18 |
| Mouser Attack!Teenage Mutant Ninja Turtles · 95 | Teenage Mutant Ninja Turtles | 95 | Common | €0.04 |
| Mouser FoundryTeenage Mutant Ninja Turtles · 96 | Teenage Mutant Ninja Turtles | 96 | Common | €0.05 |
| Mouser Mark IIITeenage Mutant Ninja Turtles · 159 | Teenage Mutant Ninja Turtles | 159 | Common | €0.03 |
| Mouse TrapperBloomburrow · 22 | Bloomburrow | 22 | Uncommon | €0.08 |
| Mouth // FeedAmonkhet · 214 | Amonkhet | 214 | Rare | €0.22 |
| Mouth // FeedAmonkhet Promos · 214s | Amonkhet Promos | 214s | Rare | $0.50 |
| Mouth // FeedAmonkhet Remastered · 202 | Amonkhet Remastered | 202 | Rare | — |
| Mouth of RonomColdsnap · 148 | Coldsnap | 148 | Uncommon | €0.39 |
| Mouth of RonomTales of Middle-earth Commander · 370 | Tales of Middle-earth Commander | 370 | Mythic Rare | $1.42 |
| Mouth of RonomTales of Middle-earth Commander · 400 | Tales of Middle-earth Commander | 400 | Mythic Rare | $10.58 |
| Mouth of RonomTales of Middle-earth Commander · 400z | Tales of Middle-earth Commander | 400z | Mythic Rare | €408.99 |
| Mouth of RonomThe List Tokens · CSP-148 | The List Tokens | CSP-148 | Uncommon | €0.20 |
| Mouth of the StormEdge of Eternities · 70 | Edge of Eternities | 70 | Uncommon | €0.10 |
| Mouth to MouthUnhinged · 40 | Unhinged | 40 | Uncommon | €0.20 |
| MowuReality Fracture Tokens · 10 | Reality Fracture Tokens | 10 | — | — |
| Mowu, Loyal CompanionCommander Masters · 306 | Commander Masters | 306 | Uncommon | €0.13 |