Altansar

Altansar was a small Eldar Craftworld that survived the Fall.

History
Seeing the fate that would consume the decadent Eldar, many farsighted Eldar created Craftworlds to escape the Fall and creation of Slaanseh. Though many Craftworlds were destroyed by the psychic shockwave of Slaanesh's birth a few survived. Altansar was one of these Craftworlds but was unfortunately caught in the Eye of Terrors gravity well like Ulthwe. During an expansion of the Eye, Altansar was sucked into the Eye. The Phoenix Lord Maugen Ra was believed to be the sole survivor of the incident

The Thirteenth Crusade
During the Thirteenth Crusade Maugen Ra lead an elite force of Dark Reapers, the Black Guardians, in the search for Altansar. Using the Webway Eldar forces struck at several Crone worlds located deep within the Eye of Terror. It was on one of these worlds, Belial IV, that the Eldar were fighting on. Depsite the best efforts of the Ulthwe Eldar and Harlequins a Daemon horde led a devastating counterattack. As the Eldar were near defeat the withered Craftworld of Altansar appeared in Belial's orbit. Hundreds of pale Eldar pushed the Daemonic forces back, helping the Eldar to reclaim the world.