"Planet Saiyan shall be as it's parent Planet Vegeta. A graveyard for the darkest of the Saiyans, still whispering within their tombs. It shall always be a source of evil, spawning threats throughout the millennia. It, like Planet Vegeta, brushes the edges of the empire that waits in the dark. And like Planet Vegeta, the saiyans have forgotten it … for a time. They will remember."
Planet Saiyan or New Vegeta II is a planet that was once dominated by Frieza and is the true homeworld of the Saiyans. It appears briefly when Vegeta recalls his father mentioning a true world for the Saiyans. It was the sole planet in the Horuset system, located across the galaxy from Earth. It was the original homeworld of the Saiyan species and a sacred planet for the Saiyan Empire, housing the tombs for many ancient and powerful Saiyan Kings, and containing tremendous dark ki.
After the Saiyan Civil War, the remaining saiyans abandoned this world and it became a barren world.
First Challenging Invasion
This remote, forbidding planet was the original homeworld of the Saiyan species. The Challengings invaded New Vegeta II in an attempt to integrate the world into their infinite empire, intending to harvest slaves from the planet to be used for mercenary projects.
The Challengings were eventually forced off the world after the Saiyan King Adas led his people against them. Adas died in the battle, and thus, despite this victory, saiyan society crumbled, and, in the ensuing centuries of strife, the saiyan relocated to Planet Plant, leaving New Vegeta II as a graveyard world.