| Name | CR | Type | Environment |
| Tashtari | 3 | magical beast | any forests or marshes (Castrovel) |
| Tashtari, Tashtari Alpha | 7 | magical beast | any forests or marshes (Castrovel) |
| The Swarm, Swarm Corrovox | 3 | monstrous humanoid | any |
| The Swarm, Swarm Dreadlancer | 11 | starship monstrous humanoid | any vacuum |
| The Swarm, Swarm Mindreaper | 7 | monstrous humanoid | any |
| The Swarm, Swarm Thresher Lord | 10 | monstrous humanoid | any |
| Thermatrod | 3 | magical beast (fire) | any warm mountains |
| Trox | 2 | monstrous humanoid | any (Nchak) |
| Trox, Trox Defensor | 9 | monstrous humanoid | any (Nchak) |
| Twinsoul | 8 | aberration | any vacuum (Material and Ethereal Planes) |