Planejammer: The Misfits
Lost githyanki city. Used to make the finest Silver Swords in existence. Legend has it that a huge psionic forge at the center of the city was not enough to save it when the Lich Queen discovered that its leader, a lich named Rha-zhul, had long been the secret leader of a well concealed cult of Nerul. It would seem that the reason so few have ever heard of Kamyn-Dhun is because knowing of its existence carries a death sentence from the Lich Queen.