For a character with a devil bloodline, an erinyes is often the source. However, other devils with the ability to use a polymorph effect, such as gelugons or pit fiends, have been known to consort with mortals. A character with this bloodline may also possess tiny horns or unusually sharp teeth.
| Character Level | Minor | Intermediate | Major |
|---|---|---|---|
| 1st | — | — | +2 on Deception checks |
| 2nd | — | +2 on Deception checks | Dodge |
| 3rd | — | — | Charisma +1 |
| 4th | +2 on Deception checks | Dodge | Darkness 1/day (Sp) |
| 5th | — | — | Devil affinity +2 |
| 6th | — | Charisma +1 | Smite good 1/day (Su) |
| 7th | — | — | +2 on Persuasion checks |
| 8th | Dodge | Darkness 1/day (Sp) | Resistance to fire 5 (Ex) |
| 9th | — | — | Constitution +1 |
| 10th | — | Devil affinity +2 | +2 on saves against poison (Ex) |
| 11th | — | — | Devil affinity +4 |
| 12th | Charisma +1 | Smite good 1/day (Su) | Resistance to acid 5 (Ex) |
| 13th | — | — | +2 on Insight checks |
| 14th | — | +2 on Persuasion checks | Alertness |
| 15th | — | — | Intelligence +1 |
| 16th | Darkness 1/day (Sp) | Resistance to fire 5 (Ex) | Resistance to cold 5 (Ex) |
| 17th | — | — | Devil affinity +6 |
| 18th | — | Constitution +1 | +1 to natural armor |
| 19th | — | — | +4 on Perception checks |
| 20th | Devil affinity +2 | +2 on saves against poison (Ex) | Damage reduction 5/good |