Planar-blooded humanoids with infernal magic and darkvision.
Racial Traits
Fiendish Legacy. Choose a legacy (Abyssal, Chthonic, or Infernal). You gain its level 1 benefit and extra spells at levels 3 and 5. You can cast each legacy spell once per Long Rest without a slot, or with spell slots. Choose Intelligence, Wisdom, or Charisma as spellcasting ability.
Otherworldly Presence. You know Thaumaturgy. It uses the same spellcasting ability as your Fiendish Legacy spells.
Darkvision. You have Darkvision out to 60 feet.
Subraces
Abyssal Legacy
Level 1: Poison Resistance and Poison Spray cantrip. Level 3: Ray of Sickness. Level 5: Hold Person.
Chthonic Legacy
Level 1: Necrotic Resistance and Chill Touch cantrip. Level 3: False Life. Level 5: Ray of Enfeeblement.
Infernal Legacy
Level 1: Fire Resistance and Fire Bolt cantrip. Level 3: Hellish Rebuke. Level 5: Darkness.