They intended to use the Exomorphs as a form of work force and beasts of burden in their empire which was over three thousand years ago. However, they lost control of the creatures when one of the Exomorphs called the Archeopendra gained sentience. Using this intelligence, it succeeded in destroying the ancient Idryll empire but not before they were stopped and placed in a deep slumber. These actions collapsed the Idryll civilization fell into a dark age which regressed into a pre-warp society where science and technology were lost to them. The Attrexian race was later involved in destroying the remaining Exomorphs and believed they had destroyed the remaining manufacturing facilities but they simply repaired themselves and awaited to be activated.