| Name | Map Tool Token Link | Family | Type | Size | CR |
|---|---|---|---|---|---|
| Manticore | |
Manticore | Magical beast | Large | 5 |
| Giant Mantis | RPTok | Mantis | Vermin | Large | 3 |
| Medusa | |
Medusa | Monstrous humanoid | Medium | 7 |
| Mephit | RPTok | Mephit | Outsider | Small | 3 |
| Merfolk | RPTok | Merfolk | Humanoid | Medium | 1/3 |
| Adult Brass Dragon | |
Metallic Dragon | Dragon | Large | 11 |
| Adult Bronze Dragon | |
Metallic Dragon | Dragon | Huge | 13 |
| Adult Copper Dragon | |
Metallic Dragon | Dragon | Large | 12 |
| Adult Gold Dragon | |
Metallic Dragon | Dragon | Huge | 15 |
| Adult Silver Dragon | |
Metallic Dragon | Dragon | Huge | 14 |
| Ancient Brass Dragon | |
Metallic Dragon | Dragon | Huge | 16 |
| Ancient Bronze Dragon | |
Metallic Dragon | Dragon | Gargantuan | 18 |
| Ancient Copper Dragon | |
Metallic Dragon | Dragon | Huge | 17 |
| Ancient Gold Dragon | |
Metallic Dragon | Dragon | Gargantuan | 20 |
| Ancient Silver Dragon | |
Metallic Dragon | Dragon | Gargantuan | 19 |
| Young Brass Dragon | |
Metallic Dragon | Dragon | Medium | 7 |
| Young Bronze Dragon | |
Metallic Dragon | Dragon | Large | 9 |
| Young Copper Dragon | |
Metallic Dragon | Dragon | Medium | 8 |
| Young Gold Dragon | |
Metallic Dragon | Dragon | Large | 11 |
| Young Silver Dragon | |
Metallic Dragon | Dragon | Large | 10 |
| Mimic | |
Mimic | Aberration | Medium | 4 |
| Minotaur | |
Minotaur | Monstrous humanoid | Large | 4 |
| Mite | RPTok | Mite | Fey | Small | 1/4 |
| Mohrg | |
Mohrg | Undead | Medium | 8 |
| Morlock | RPTok | Morlock | Monstrous humanoid | Medium | 2 |
| Mummy | |
Mummy | Undead | Medium | 5 |