race features:
Truesight. They have 10 ft of Truesight, inherited from their ancestor's charge in bringing the enemies of the underworld into line in spite of all efforts to hide. At 5th level this expands to 15 ft, and at 10th level it expands to 20ft of innate Truesight.
Whip Masters. You are always considered proficient with any whip. What's more, whips wielded by you gain an extra 5 feet of reach and take on a more demonic aura, glowing the color of your eyes.
Glider. At 1st level you sprout red fuzzy wings you can glide 10 feet for every 5 feet fallen. At 7th level you may fly at half speed you walk. 15th level you may fly at the same speed you walk.