| Name ▲ | Type | CR | Version | Book |
|---|---|---|---|---|
| Intelligent Black Pudding | Ooze | 4 | 2014 | Waterdeep: Dungeon of the Mad Mage |
| Invisible Stalker | Elemental | 6 | 2014/2024 | Multiple Books (MM, XMM) |
| Iona | Celestial | 21 | 2014 | Plane Shift: Zendikar |
| Irda Seeker | Giant | 1 | 2014 | Monstrous Compendium Volume 2 - Dragonlance Creatures |
| Irda Veil Keeper | Giant | 4 | 2014 | Monstrous Compendium Volume 2 - Dragonlance Creatures |
| Ireena Kolyana | Humanoid | 1/8 | 2014 | Curse of Strahd |
| Irisoth | Humanoid | 0 | 2014 | Tales from the Yawning Portal: Against the Giants |
| Iron Cobra | Construct | 4 | 2014 | Mordenkainen's Tome of Foes |
| Iron Consul | Humanoid | 2 | 2014 | Baldur's Gate: Descent Into Avernus |
| Iron Defender | Construct | 1 | 2014 | Eberron: Rising from the Last War |