| Name | CR | Type | Environment |
| Ihonva | 4 | monstrous humanoid | warm desert (Verces) |
| Ikeshti, Ikeshti Brood-Minder | 2 | humanoid (ikeshti) | any deserts, hills, or mountains (Akiton) |
| Ikeshti, Ikeshti Rivener | 5 | humanoid (ikeshti) | any deserts, hills, or mountains (Akiton) |
| Ilthisarian | 4 | monstrous humanoid (ilthisarian) | any swamp (Arshalin) |
| Inevitable, Anhamut | 10 | outsider (inevitable, lawful) | any |
| Iztheptar | 6 | humanoid | any |