Port of Lost Souls
Commorragh, also known as the Dark City is the capital of the Dark Eldar society. It's located deep within the labyrinth of the Webway, the space between realspace and the Warp.
History
The origins of Commoragh are traced to the times of the ancient Eldar empire when it was dominant in the galaxy where it became one of the greatest Webway port-cities.1-p8 Port Commoragh was established in M18 as the primary nodal port in the Webway.1-p20 This allowed it the capacity to transport a fleet to any of the most vital planets of the Eldar. Its ability to access the far-flung corners of realspace led it to becoming the most important location in the entire Webway. Thus, it was considered too valuable to belong to any one aspect of the Eldar empire and was granted autonomy. However, this meant that Commoragh became outside the jurisdiction of the great Eldar councils of the time and thus attracted many to the port-city who wished to hide their deeds. In time, this realm expanded with wealth and influence reaching across its borders leading it to absorb other locations within the Webway such as port-cities, private estates and sub-realms. With each expansion, Commoragh grew even larger and more impressive as it fed upon the plundered wealth of these parts of the Webway.1-p8 By M31, the Fall of the Eldar fell upon their empire which shattered their civilization forever. The unrepentant Eldar that survive this event continue to survive within the Webway between M31 to M32 that sees Commoragh become a vast realm itself and the Dark City coming under the oppressive rule of the noble houses that lurk within its heart.1-p20
Commorragh has stood for over ten millennia, and due to the difficulties of surviving the Dark Eldar way of life, combined with needing to live much longer than what is considered possible for normal Eldar, there is only one being who could possibly remember the founding first-hand: Asdrubael Vect, Supreme Lord of the Kabal of the Black Heart. In fact, Vect claims that he is the founder of Commorragh, as well as the one who discovered the way of extracting souls from living creatures in order to prolong one's life. Unfortunately, he is the only one nearly ancient enough to know whether these statements are true or false, so the validity of this claim is unknown. But it seems that by M35, Vect had achieved total dominance over Commorragh following the Imperium's raid on the city that virtually wiped out the old aristocracy.1-p8
Commorragh suffered another invasion in 227.M38, this time at the hands of Orks under the Warboss and Weirdboy Zoggit. Zoggit led his forces through a Webway rift, emerging in the Commorrite port of Blackblood. The hundreds of thousands of Orks rampage throughout parts of the city until the local Kabals are able to isolate and destroy each individual mob piece by piece. Commorragh suffered heavy damage during the battle, with several districts destroyed. However the Dark Eldar still managed to benefit from the attack, using 10,000 captured Greenskins for a grand gladiatorial spectacle in the Wych arenas.
Background
Within the Webway, Commoragh appears as a composite entity of impossible scale as it acts more like a vast collection of satellite realms and cities that are all linked to one another by either an number of portals or other hidden pathways. As such, the Dark City can be seen as a loose collection of far-flung nodes spread across the passageways of the Webway. The most clustered concentrations reside in a reality that are scattered across the galaxy that are thousands of light years apart in some places. However, shortcuts are present that link these points together in the form of dimensional gateways that allow the immense distances of the sub-realms to be crossed with a single step. Runic wards are present that protect Commoragh from being breached by outsiders.1-p8
There are many rumours about Commorragh, the terrifying home of the Dark Eldar, making it difficult to know just what is truth, and what has been fabricated by the shattered psyches of those unfortunate enough to find themselves in Commorragh.