| Name | Cost | Price |
|---|---|---|
| Masticore | $2.62 | |
| Masumaro, First to Live | $0.89 | |
| Matca Rioters | $0.10 | |
| Match the Odds | $0.21 | |
| Mathas, Fiend Seeker | — | |
| Mathemagics | $5.22 | |
| Mathise, Surge Channeler | $5.63 | |
| Math is for Blockers | — | |
| Matoya, Archon Elder | $0.44 | |
| Matsu-Tribe Decoy | $0.07 | |
| Matsu-Tribe Sniper | $0.13 | |
| Matterbending Mage | $0.12 | |
| Matter Reshaper | $0.36 | |
| Mauhúr, Uruk-hai Captain | $0.73 | |
| Maulfist Doorbuster | $0.10 | |
| Maul of the Skyclaves | $0.28 | |
| Maul Splicer | $0.17 | |
| Mausoleum Guard | $0.10 | |
| Mausoleum Harpy | $0.05 | |
| Mausoleum Secrets | $0.71 | |
| Mausoleum Turnkey | $0.14 | |
| Mausoleum Wanderer | $0.28 | |
| Maverick Thopterist | $0.19 | |
| Mavinda, Students' Advocate | $0.56 |