Aberrations are utterly alien beings.
| Title | Content |
|---|---|
| Aboleth | CR 10 Large Aberration Armor Class 17 (natural armor) Hit Points 165 Speed 10 ft., … |
| Chuul | CR 4 Large Aberration Armor Class 15 (natural armor) Hit Points 80 Speed 30 ft., … |
| Cloaker | CR 8 Large Aberration Armor Class 14 (natural armor) Hit Points 105 Speed 10 ft., … |
| Gibbering Mouther | CR 2 Medium Aberration Armor Class 9 Hit Points 72 Speed 10 ft., swim 10 … |
| Lantern Hagfish | CR 1/8 Small Aberration Armor Class 11 Hit Points 9 Speed 15 ft., swim 30 … |
| Mordovermis | CR 3 Large Aberration Armor Class 13 (natural armor) Hit Points 72 Speed 10 ft., … |
| Otyugh | CR 5 Large Aberration Armor Class 14 (natural armor) Hit Points 108 Speed 30 ft. … |
| Star Crow | CR 1/4 Tiny Aberration Armor Class 15 (natural armor) Hit Points 12 Speed 20 ft., … |