| Name ▲ | Type | CR | Version | Book |
|---|---|---|---|---|
| Infected Townsperson | Humanoid | 2 | 2014 | Phandelver and Below: The Shattered Obelisk |
| Initiate of the Comet | Humanoid | 4 | 2014 | The Book of Many Things |
| Inkling Mascot | Ooze | 1/4 | 2014 | Strixhaven: A Curriculum of Chaos |
| Inquisitor of the Mind Fire | Humanoid | 8 | 2014 | Multiple Books (RHW, VRGR) |
| Inquisitor of the Sword | Humanoid | 8 | 2014 | Multiple Books (RHW, VRGR) |
| Inquisitor of the Tome | Humanoid | 8 | 2014 | Multiple Books (RHW, VRGR) |
| Insight Acuere | Humanoid | 5 | 2014 | Critical Role: Call of the Netherdeep |
| Inspired | Humanoid | 2 | 2014 | Eberron: Rising from the Last War |
| Intellect Devourer | Aberration | 2 | 2014/2024 | Multiple Books (MM, XMM) |
| Intellect Snare | Aberration | 8 | 2014 | Phandelver and Below: The Shattered Obelisk |