| Name | Challenge Rating | Combatants | |
|---|---|---|---|
| Balor | 19 | 0 | adjudicator |
| Barbed Devil | 5 | 0 | adjudicator |
| Basilisk | 3 | 0 | adjudicator |
| Bearded Devil | 3 | 0 | adjudicator |
| Behir | 11 | 0 | adjudicator |
| Black Dragon Wyrmling | 2 | 0 | adjudicator |
| Black Pudding | 4 | 0 | adjudicator |
| Blue Dragon Wyrmling | 3 | 0 | adjudicator |
| Bone Devil | 9 | 0 | adjudicator |
| Brass Dragon Wyrming | 1 | 0 | adjudicator |
| Bronze Dragon Wyrmling | 2 | 0 | adjudicator |
| Bugbear | 1 | 0 | adjudicator |
| Bulette | 5 | 0 | adjudicator |