race features:
Hellish Loyalty (1/Day). As a reaction when an ally this creature can see is reduced to 0 hit points, that ally gains one successful saving throws and advantage on its next death saving throw.
Legacy of Phlegethos. You know the friends cantrip. When you reach 3rd level, you can cast the charm person spell as a 2nd-level spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the suggestion spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.