Formed from clay as a twin to Diana (Wonder Woman), the dark-skinned Nubia was kidnapped by Mars, who raised her, controlling her mind so that she would help him bring down the Amazons.
After a session in the Amazon memory banks, Diana was confronted by an armored female warrior who challenged her to single combat. The two initially wrestled, then faced each other with swords. Diana and the intruder seemed evenly matched until the intruder knocked the sword from Diana’s hands, and then hesitated to kill her, giving Diana the chance to wrestle her to a draw.
The stranger declared herself as Nubia. Queen Hippolyta wondered if this was indeed the same Nubia who was to be raised as Diana’s sister.
Nubia left the Amazons and returned to her mist-concealed Floating Island (named Slaughter Island by Mars). She told Diana that they will meet again and one of them will be proven the true Wonder Woman. She eventually did return, and reiterated her claim to the title of Wonder Woman. Later on, Nubia put down a challenge to her rule by one of the male warriors of Slaughter Island; she defeated the man but let him live, stating that “A woman doesn’t destroy life, she cherishes it!”
Sometime later, Supergirl was made an honorary Amazon. When it was discovered that Nubia was suffering from a mutated shark’s poisoning, Hippolyta sent Kara to retrieve a rare root needed to cure her.
Real Name: Nubia
Alias: Wonder Woman
Relatives: Hippolyta (mother), Diana (sister), Donna Troy (adopted sister), Ares (grandfather)
Base of Operations: Paradise Island, Themiscyra
Weight: 115lbs. (70kg)
Powers: Super strength, speed, agility, reflexes, senses, stamina and endurance. Flight, hand to hand combatant, Magical weaponry, including a magical sword and armor. Paralyzing “Cold Sight”, ability to open dimensional portals, the ability to relieve her body of physical injury and toxins by becoming one with the Earth’s soil and then reforming her whole body again.
Creators: Robert Kanigher, Don Heck
First Appearance: Wonder Woman #204 (February, 1973)
This version of Nubia, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions. – https://dc.fandom.com/wiki/Nubia_(Earth-One)