After betraying the elves and attempting to kill Corellon, Araushnee is banished from the elven pantheon and cast into the Abyss. Her son Vhaeraun (who was also banished) and daughter Eilistraee (who chose exile) start flee to Toril. Araushnee makes a new home for herself named the Demonweb Pits and becomes the demon-goddess Lolth.
When the elves began arriving in Toril through Fey Gates around -27000 DR, the dark elves quickly established the first large-scale elven kingdom to survive a world ruled by dragons. Ilythiir was an expansionist country, that started in the southern jungles and spread throughout southern Faerûn during the Dawn Age. It experienced another period of expansion during the First Flowering, during which it spread across the areas later known as the Shaar and Forest of Amtar. Ilythiir was a nation that institutionalized slavery. After Syòrpiir, Eiellûr and Thearnytaar fell in the face of Ilythiir's strength, the moon and wild elves were enslaved. Vhaeraun was worshipped among the Ilythiir above all other deities.
After the Fourth Crown War, the surface elves begged Correllon to do something about the constant conflict and wars with the dark elf Kingdom of Ilythiir. The elves' plea were answered by −10,000 DR. Corellon's magic changed the dark elves into drow. Over the course of two months, weakness against sunlight and/or the efforts of the other elven nations drove them into the Underdark and the mighty surface kingdom of Ilythiir collapsed.