race features:
Infernal Command: You are able to speak words of leadership that makes your allies refuse to surrender. As a bonus action, allies within 60 feet of it can't be charmed or frightened until the end of your next turn. You are able to do this up to your Charisma Modifier before having to take a long rest.
Hells Mount: As an action, you are able to summon a Nightmare as your mount. It has the normal stats of a Nightmare and follows your command. It is only able to stay in form in the Material Plane for up to your Wisdom Modifier hours.