| Name | Map Tool Token Link | Family | Type | Size | CR |
|---|---|---|---|---|---|
| 1st-Level Warrior Maenad | |
Maenad | Humanoid | Medium | 1/2 |
| Magmin | |
Magmin | Elemental | Small | 3 |
| Malebranche | |
Devil | Outsider | Huge | 9 |
| Manta Ray | |
Manta Ray | Animal | Large | 1 |
| Manticore | |
Manticore | Magical Beast | Large | 5 |
| Marilith | |
Demon | Outsider | Large | 17 |
| Marraenoloth | |
Yugoloth | Outsider | Medium | 10 |
| Marrash | |
Marrash | Outsider | Medium | 5 |
| Marut | |
Inevitable | Construct | Large | 15 |
| Medusa | |
Medusa | Monstrous Humanoid | Medium | 7 |
| Meenlock | |
Meenlock | Aberration | Tiny | 3 |
| Megalodon | |
Megalodon | Animal | Gargantuan | 11 |
| Megapede | |
Megapede | Vermin | Colossal | 20 |
| Megaraptor | |
Dinosaur | Animal | Huge | 6 |
| Air Mephit | |
Mephit | Outsider | Small | 3 |
| Dust Mephit | |
Mephit | Outsider | Small | 3 |
| Earth Mephit | |
Mephit | Outsider | Small | 3 |
| Fire Mephit | |
Mephit | Outsider | Small | 3 |
| Ice Mephit | |
Mephit | Outsider | Small | 3 |
| Magma Mephit | |
Mephit | Outsider | Small | 3 |
| Ooze Mephit | |
Mephit | Outsider | Small | 3 |
| Salt Mephit | RPTok | Mephit | Outsider | Small | 3 |
| Steam Mephit | RPTok | Mephit | Outsider | Small | 3 |
| Water Mephit | RPTok | Mephit | Outsider | Small | 3 |
| Mercane | RPTok | Mercane | Outsider | Large | 5 |
| 1st-Level Warrior Merfolk | RPTok | Merfolk | Humanoid | Medium | 1/2 |
| Mimic | |
Mimic | Aberration | Large | 4 |
| Mind Flayer | |
Mind Flayer | Aberration | Medium | 8 |
| Mind Flayer 9th-Level Sorcerer | RPTok | Mind Flayer | Aberration | Medium | 17 |
| Minotaur | |
Minotaur | Monstrous Humanoid | Large | 4 |
| Minotaur of Legend | RPTok | Monster of Legend | Outsider | Large | 6 |
| Minotaur Zombie | RPTok | Zombie | Undead | Large | 4 |
| Mithral Golem | |
Golem | Construct | Huge | 21 |
| Mohrg | |
Mohrg | Undead | Medium | 8 |
| Monkey | RPTok | Monkey | Animal | Tiny | 1/6 |
| Colossal Monstrous Centipede | |
Monstrous Centipede | Vermin | Colossal | 9 |
| Gargantuan Monstrous Centipede | |
Monstrous Centipede | Vermin | Gargantuan | 6 |
| Huge Monstrous Centipede | |
Monstrous Centipede | Vermin | Huge | 2 |
| Large Monstrous Centipede | |
Monstrous Centipede | Vermin | Large | 1 |
| Medium Monstrous Centipede | |
Monstrous Centipede | Vermin | Medium | 1/2 |
| Small Monstrous Centipede | |
Monstrous Centipede | Vermin | Small | 1/4 |
| Tiny Monstrous Centipede | |
Monstrous Centipede | Vermin | Tiny | 1/8 |
| Colossal Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Colossal | 12 |
| Gargantuan Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Gargantuan | 10 |
| Huge Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Huge | 7 |
| Large Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Large | 3 |
| Medium Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Medium | 1 |
| Small Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Small | 1/2 |
| Tiny Monstrous Scorpion | |
Monstrous Scorpion | Vermin | Tiny | 1/4 |
| Colossal Monstrous Spider | |
Monstrous Spider | Vermin | Colossal | 11 |
| Gargantuan Monstrous Spider | |
Monstrous Spider | Vermin | Gargantuan | 8 |
| Huge Monstrous Spider | |
Monstrous Spider | Vermin | Huge | 5 |
| Large Monstrous Spider | |
Monstrous Spider | Vermin | Large | 2 |
| Medium Monstrous Spider | |
Monstrous Spider | Vermin | Medium | 1 |
| Small Monstrous Spider | |
Monstrous Spider | Vermin | Small | 1/2 |
| Tiny Monstrous Spider | |
Monstrous Spider | Vermin | Tiny | 1/4 |
| Moonbeast | RPTok | Moonbeast | Aberration | Huge | 16 |
| Mooncalf | RPTok | Mooncalf | Magical Beast | Large | 10 |
| Moonrat | RPTok | Moonrat | Magical Beast | Tiny | 1/4 |
| Morkoth | RPTok | Morkoth | Aberration | Medium | 5 |
| Mountain Giant | RPTok | Giant | Giant | Colossal | 26 |
| Mu Spore | RPTok | Mu Spore | Plant | Colossal | 21 |
| Mudmaw | RPTok | Mudmaw | Magical Beast | Large | 7 |
| Mule | RPTok | Mule | Animal | Large | 1 |
| Mummy | |
Mummy | Undead | Medium | 5 |
| 10th-Level Cleric Mummy Lord | |
Mummy | Undead | Medium | 15 |
| Myconid Average Worker | RPTok | Myconid | Plant | Small | 1 |
| Myconid Circle Leader | RPTok | Myconid | Plant | Large | 6 |
| Myconid Elder Worker | RPTok | Myconid | Plant | Medium | 2 |
| Myconid Guard | RPTok | Myconid | Plant | Medium | 4 |
| Myconid Junior Worker | RPTok | Myconid | Plant | Tiny | 1/2 |
| Myconid Sovereign | RPTok | Myconid | Plant | Large | 7 |