Ebony wants to build a strong team. She has chosen this next one for her long years of fighting and her special abilities. And the strip of white hair helped too.
"Nu'Bia is called Wonder Woman's super foe. Nubia possessed a magic sword which was the only weapon on Earth that could counteract Diana's magic lasso. She could also glide on air currents like Wonder Woman and possessed super-strength as well as all other Amazon abilities."*
"Nu'Bia has 3,000 years of combat experience providing her expertise in both hand to hand combat as well as with hand held weapons. As a Themyscirian Amazon she also possesses immortality that allows her to live indefinitely in a youthful form, but does leave her open to potential injury and death depending on her actions. She also possesses enhanced strength and intelligence. As shown by fellow members of her tribe, she has the capability to break apart steel and concrete with her bare hands,jump over 12 feet from a standing position, and the ability to absorb and process a vast amount of knowledge in a short period of time."*
*info from Wikipedia