| Name | Challenge Rating | Combatants | |
|---|---|---|---|
| Sahuagin | ½ | 0 | adjudicator |
| Salamander | 5 | 0 | adjudicator |
| Satyr | ½ | 0 | adjudicator |
| Sea Hag | 2 | 0 | adjudicator |
| Sea Hag (in coven) | 4 | 0 | adjudicator |
| Shadow | ½ | 0 | adjudicator |
| Shambling Mound | 5 | 0 | adjudicator |
| Shield Guardian | 7 | 0 | adjudicator |
| Shrieker | 0 | 0 | adjudicator |
| Silver Dragon Wyrmling | 2 | 0 | adjudicator |
| Skeleton | ¼ | 0 | adjudicator |
| Solar | 21 | 0 | adjudicator |
| Spectre | 1 | 0 | adjudicator |
| Spirit Naga | 8 | 0 | adjudicator |
| Sprite | ¼ | 0 | adjudicator |
| Steam Mephit | ¼ | 0 | adjudicator |
| Stirge | ⅛ | 0 | adjudicator |
| Stone Giant | 7 | 0 | adjudicator |
| Stone Golem | 10 | 0 | adjudicator |
| Storm Giant | 13 | 0 | adjudicator |
| Succubus | 4 | 0 | adjudicator |