Thanks to your infernal heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of grey.
You have resistance to fire damage.
You have advantage on saving throws against being frightened.
You have proficiency with the dagger and pitchfork.
You know the insight of fear and death blade cantrips. Once you reach 3rd level, you can cast the hellish rebuke spell once with this trait, and you regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.