Rise of the Flayers
During this period in time much of the surface and Underdark alike were corrupted by the influence of the mind flayers. Though now mostly rebuilt, mass destruction and ruin overtook much of the world. Many of Tsaer’lywn’s best and bravest warriors died in the struggle against the forces of the Underdark and nearly everyone lost someone close to them in the years of war. The plot of the mind flayers also stained the sky green, a constant reminder for all on the surface of how close they were to enslavement. For being such an important time in the worlds history the end of it is still veiled in mystery. Just at the time when both the surface and Underdark looked sure to fall to the illithid, the mind flayers simply stopped their assault and retreated to the inner depths of the Underdark. No one knows for certain what drove the mind flayers back, and many still await the day the illithid masters return to finish the task of total enslavement of Tsaer’lywn.