| Name | Cost | Price |
|---|---|---|
| Marsh Flats | $32.67 | |
| Marsh Flitter | $0.19 | |
| Marsh Gas | $0.32 | |
| Marshland Bloodcaster | $0.34 | |
| Marshmist Titan | $0.11 | |
| Marsh Threader | $0.07 | |
| Marsh Viper | $0.09 | |
| Martha Jones | $0.37 | |
| Martial Coup | $0.34 | |
| Martial Glory | $0.15 | |
| Martial Impetus | $0.08 | |
| Martial Law | $0.21 | |
| Martyrdom | $0.32 | |
| Martyr of Dusk | $0.13 | |
| Martyr of Frost | $0.21 | |
| Martyr of Sands | $0.19 | |
| Martyr of Spores | $0.18 | |
| Martyr's Bond | $0.66 | |
| Martyr's Cause | $1.31 | |
| Marvelous Melee | $0.23 | |
| Marvin, Murderous Mimic | — | |
| Marwyn, the Nurturer | $3.55 | |
| Mary Jane Watson | $0.31 | |
| Mary O'Kill | $0.21 |