Far Sight

You have darkvision to a range of 60 feet and can see in magical darkness to a range of 30 feet.

Otherworldly Form

You have resistance to necrotic damage and the amount of time you can survive without air, food, water, or sleep is double that of a typical character.

Fiendish Natural Adaptation
You possess notable physical characteristics that mark your connection to realms of evil or chaos. You might bear bony horns that jut from your skull, emit a perpetual odor of smoke, or have a barbed tail. You also gain the following:

• Dreadful Guise. Once per long rest, you can use a bonus action to assume an otherworldly guise for 1 minute. While the transformation lasts, creatures of your choice that come within 10 feet of you for the first time on a turn or start their turn there must succeed on a CHA save (DC equals 10 + your PB) or become frightened of you until the end of your next turn. Once a creature succeeds on this save, they can’t be affected by this feature again for 24 hours. While transformed, once on each of your turns when you deal damage with an attack or spell, you can choose to convert the damage type (or types) to necrotic or fire damage (your choice).