Avernus Cathedral

Avernus cathedral was the focal point of the city of Avernus and the centre of worship for the inhabitant's god. Unknown to most, the catacombs beneath the cathedral were home to a different type of worship, that of Hash'ak'gik.

The catacombs were possibly once the site of a Hylden stronghold, as the walls had murals depicting past events from the Hylden point of view. They were populated by the cenobites.

The matriarch of the city and owner of the cathedral, Azimuth was instructed by Hylden, pretending to be her god Hash'ak'gik to use a time streamer she had stolen from Moebius to bring Turel back from around 2000 years in the future. Turel, possessed intermittantly by various other Hylden was then used to impersonate Hash'ak'gik so his human worshipers could have something to embody their god and the Hylden possessing him could give orders to his followers personally.

In 0 A.B.O, Azimuth, insane from Nupraptor's psychic corruption summoned hordes of demons which slaughtered the inhabitants of Avernus and set the city on fire. The fledgeling vampire Kain arrived shortly thereafter to successfully assassinate Azimuth. Raziel, on the advice of Vorador arrived at the cathedral at the same time looking for the Heart of Darkness so that he could resurrect Janos Audron. The older Kain had travelled through time, worried about what would happen if Raziel found the Heart and followed Raziel inside. Raziel ran into Mortanius but fell into Turel's pit. Battling with possession by the Hylden, Turel needed blood to gather the strength to get rid of them, not aware that Raziel was no longer a creature of flesh and blood, he attacked his brother but was defeated. Raziel got the chance to talk to Mortanius who told him that he had placed the Heart of Darkness inside Kain. Raziel left to find his former lord, only to discover Kain was right on Raziel's tail. Raziel attacked and won, tearing the Heart out of Kain and leaving him to die before returning to Vorador's mansion to bring Janos back to life.