I would like to if possible combine the description below with that of her human form. What would be a good skin color to change the skin to because I think that black skin might not work as well? The problem with making the mother of monster's humanoid form have bird legs is the description starts to sound like Pathfinder's description of Lamashtu.
You see standing there before you a six feet tall harpy-like creature. Her upper body is that of a beautiful unclad woman with pitch-black skin. Luscious raven hair cascades down her back down to her waist. The hair is twined with snakes. The eyes are piercing red. Instead of hands she has enormous pitch-black bat wings. The joints of the wings are laced with razorlike claws. The wings have a wingspan of eighteen feet. Her eyes are solid piercing red. Razor sharp pointed teeth lined her jaws. Instead of human legs, she has the legs of an eagle. Her thick semi-prehensile twelve feet long tail tapers to a thin whip that end in a spike-like stinger.
Pictures of Lamashtu portray her as a jackal-headed woman, with a third vertical eye in the center of her forehead, heavily pregnant, with feathered wings (like a raven's), a snake's tail, and taloned feet (like a vulture's). She is often depicted carrying her two deadly blades, Redlust and Chillheart: the former is of fire, the latter of ice. The blades may grow and shrink from a falchion to a kukri. Her head may vary depending on the nature of her worshipers, gnolls preferring the jackal head, medusae a snake's, harpies a hawk's, and so on
