| Name ▲ | Type | CR | Version | Book |
|---|---|---|---|---|
| Lysan | Humanoid | 8 | 2024 | Vecna: Eve of Ruin |
| Lyzandra "Lyzzie" Calderos | Humanoid | 6 | 2014 | Princes of the Apocalypse |
| Macaw | Beast | 0 | 2014 | Plane Shift: Ixalan |
| Maccath the Crimson | Humanoid | 6 | 2014 | Rise of Tiamat |
| Mad Golem | Construct | 12 | 2014 | Waterdeep: Dungeon of the Mad Mage |
| Mad Maggie | Fiend | 5 | 2014 | Baldur's Gate: Descent Into Avernus |
| Mad Mary | Humanoid | 0 | 2014 | Curse of Strahd |
| Madam Eva | Humanoid | 10 | 2014 | Multiple Books (CoS, RHW) |
| Madam Kulp | Humanoid | 1/8 | 2014 | Journeys through the Radiant Citadel |
| Maddgoth's Homunculus | Construct | 2 | 2014 | Waterdeep: Dungeon of the Mad Mage |