Nemesis (ネメシス), also known as the Negamoon, is a planet that is composed of the Evil Black Crystal and home to Wiseman and the Black Moon Clan. It was thought to be tenth planet of the Solar System.
Nemesis was a dark place where very few flowers grew. The planet itself was made of the Evil Black Crystal, which was capable of absorbing light, much like a black hole. This would cause the planet to appear and disappear from the sensors tracking it in Crystal Tokyo, making its orbit seem erratic and difficult to trace.
For a long time, the planet remained cloaked in darkness, but some time in the 30th century, it began to emit large amounts of negative energy, indicating its presence. Soon after the creation of Crystal Tokyo, there was a challenge to the peace made by the Death Phantom. Because he was human, Neo Queen Serenity did not want to kill him, so she banished him to the planet Nemesis and it became forbidden. Many years later, there was a another revolt on the Earth. After the battle, those who did not want to stay left Earth and ended up on Nemesis where they came under the influence of the Death Phantom.
At some point in time, the Death Phantom lost his physical body and his will became one with the planet.
In Sailor Senshi Beyond Edit
In the 30th century, the grown-up Chibiusa ( now known as Usagi Jr.) colonized Nemsis and proclaimed it ,,The New Mon" and named herself ,, the Queen Lady Serenity of the New Moon". Though, remains of the Black Crystal still poison the air, and there are secondary effects. Queen Lady Serenity started a quest to remove the remains of the crystal, but is affected by them herself. Neo-Queen Serenity is worried about her daughter, because she can become evil and her Sailor Crystal infectede.
As the queen tought, the Pink Moon Crystal was infected by the Black Crystal's poison, and a dark and evil form of Lady Serenity evolved from it and becomed Sailor Nemesis. The planet feed her with evil energy, thus corrupting Serenity. Fearing to not become one with her evil self and her star seed being completely corrupted, she goes to the past to fiind her childhood sweetheart, the priest Helios to purify her.
The planet is one with Wiseman's body, so he seeks revenge from the senshi, corrupting the young princess and killing the human colonies. But he unable to do this without a complete Star Seed, so he orders Sailor nemesis to fully corrupt Serenity, so he could have the Pink Moon Crystal.