Fiendling
A lineage traced to the lower planes by blood or by an unpaid bargain, whose mark can surface generations later in a person who had no part in the arrangement.
Path of the Berserker 
Assassin 
Bounty Hunter 
Channel of Conjuration 
Channel of Evocation 
Charlatan 
College of Lore 
Duelist 
Fiendsblood 
Pact of the Fiend 
Pact of the Sanguine Sacrament 
Tracker 
Way of the Body - Physiology
- Humanoid, Fiend
- Size
- Medium
- Speed
- 30 ft.
- Ability scores
- Free placement
- Languages
- Common, Netherspeech
- Lifespan
- Mature at 18, typical maximum 140 years
A Fiendling ages as its mortal line does for the first century and then slows.
Features
- Infernal Legacy
You have resistance to fire damage, and you have darkvision out to 60 feet.
- The Mark Shows
Signs of your descent show to people who have been taught what to look for, such as horns, a shadow that lags, or eyes that hold light. You have advantage on Charisma (Intimidation) checks, and disadvantage on Charisma (Persuasion) checks made against a creature that has named you for what you are.
- Unpaid Balance
The bargain your line was made under is still open. Once per long rest, when you fail a saving throw or an attack roll, you can call in the balance and reroll it, using the new result. You take 1d4 fire damage whether the reroll succeeds or fails.
- Hellspeech
You can read, write and speak Netherspeech, and you understand it spoken by anything that speaks it natively, including a creature that has no mouth.