The Diamondae have been extinct for eons. Over a trillion years has passed since their existence has been removed from Buhukiea. The reason for their disappearance is unknown, but the prevailing theory is that they created a weapon that was able to obliterate a specific race, and somehow it was used on themselves.
Prior to their untimely demise, the Diamondae had subjugated all of Buhukiea. Tyra Kolaq’blegae received the worst of the Diamondae treatment. All the races were put into slavery to suit the needs of the tyrannical Diamondae. The Diamondae themselves were not based in Tyra Kolaq’blegae, Eden, or the Netherworlds. They came from the capital-dimension of Buhukiea: Mysidia. Diamondae technology and ruins still clutter Tyra Kolaq’blegae and Mysidia and continues to baffle the experts of the Empire.