El'uriaq, Overlord of Shaa-Dom. Image Courtesy of beckjann.deviantart.com
Shaa-Dom[]
Shaa-Dom was a Dark Eldar city of the Webway and satellite realm to Commorragh. The seat of power of El'uriaq, Shaa-Dom and its overlord planned to one day dominate the Dark City. However the supreme overlord of Commorragh, Asdrubael Vect, captured a human starship and sent it crashing into Shaa-Dom through a Webway Portal. The city was devastated by the initial explosion, but the real damage came when the ship's Warp Drives detonated and opened up a rift to the Warp. Now flooded with Daemons, Shaa-Dom was sealed away from the rest of Commorragh on Vect's personal orders.
Pandaimon
Pandaimon is a trans-dimensional realm of the Webway, officially a satellite realm of Commorragh. In 799.M38, Pandaimon under Archon Qu declared independence from Commorragh and thus from Asdrubael Vect and his Kabal of the Black Heart. A great war erupted between Pandaimon and the Black Heart, with Vect eventually emerging victorious after Qu was assassinated by his own daughter (revealed to be one of Vect's many courtesans). Without their leader, Pandaimon quickly fell.