| D12 | TYPE | DESCRIPTION |
| 1 | Aberration | A creature with biology that defies reason. |
| 2 | Animal or vermin | A creature with relatively straightforward (Earth-like) biology. |
| 3 | Construct | A magically animated object or artificially constructed creature that attracts a soul. |
| 4 | Dragon | A reptilian creature, usually winged, often with magical or otherwise unusual abilities. |
| 5 | Fey | A creature with supernatural abilities and connections to nature or to some other force or place. |
| 6 | Humanoid | A creature that generally has a humanlike torso, two (or sometimes more) arms, two legs, and one head. |
| 7 | Magical beast | An animallike creature with supernatural or magical abilities. |
| 8 | Monstrous humanoid | A creature similar to a humanoid but with monstrous or animalistic features. |
| 9 | Ooze | An amorphous or otherwise mutable creature. |
| 10 | Outsider | A creature at least partially composed of the essence (but not necessarily the material) of a plane other than the Material Plane. |
| 11 | Plant | A creature that’s a plant with a magical, supernatural, or technological source of sentience. |
| 12 | Undead | A once-living creature (likely formerly one of the above creature types) animated by magic or advanced technological forces. |