| Name | Cost | Price |
|---|---|---|
| Mawcor | $0.32 | |
| Maw of Kozilek | $0.10 | |
| Maximize Altitude | $0.10 | |
| Mayael the Anima | $1.70 | |
| Mayhem Devil | $0.31 | |
| Mayhem Patrol | $0.23 | |
| May of the Machine | — | |
| Maze Behemoth | $0.06 | |
| Mazemind Tome | $0.33 | |
| Maze of Ith | $11.29 | |
| Maze's End | $1.61 | |
| Maze Skullbomb | $0.19 | |
| Mazirek, Kraul Death Priest | $0.30 | |
| Mazzy, Truesword Paladin | $0.20 | |
| M'Baku, Jabari Chieftain | $0.26 | |
| Meandering River | $0.14 | |
| Measure of Wickedness | $0.30 | |
| Meathook Massacre II | $2.39 | |
| Mechan Assembler | $0.23 | |
| Mechanized Ninja Cavalry | $0.13 | |
| Mechanized Production | $3.52 | |
| Mechanized Warfare | $0.71 | |
| Mechanozoa | $0.10 | |
| Mechtitan Core | $0.34 |