| Name ▲ | Type | CR | Version | Book |
|---|---|---|---|---|
| Regenerating Black Pudding | Ooze | 5 | 2014 | Out of the Abyss |
| Reghed Chieftain | Humanoid | 5 | 2014 | Icewind Dale: Rime of the Frostmaiden |
| Reghed Great Warrior | Humanoid | 5 | 2014 | Icewind Dale: Rime of the Frostmaiden |
| Reghed Shaman | Humanoid | 2 | 2014 | Icewind Dale: Rime of the Frostmaiden |
| Reghed Warrior | Humanoid | 1/8 | 2014 | Icewind Dale: Rime of the Frostmaiden |
| Regisaur | Monstrosity | 14 | 2014 | Bigby Presents: Glory of the Giants |
| Regular Orthoclath | Construct | 16 | 2014 | Chains of Asmodeus |
| Reigar | Celestial | 8 | 2014 | Boo's Astral Menagerie |
| Reindeer | Beast | 1/4 | 2014 | Icewind Dale: Rime of the Frostmaiden |
| Relentless Impaler | Fiend | 15 | 2024 | Vecna: Eve of Ruin |