The planet the one rules is called rock. They do not have much intelligence but the make up for it in brute strength that's why the planet is just called rock, its what the planet looked like to them. But they use to much resources so they must find another planet to live on or destroy, if they dislike the planet they will kill every life form on it. They do not think and they show no mercy. God help the next planet they arrive on. It could be earth that is next...