Aoskar

Aoskar was a wily god, the power of portals, doorways, and opportunity. Every creature passing through a doorway could utter his name as a prayer, and each use of a gate key became enmeshed with his rituals. Travel to and from the City of Doors became inseparable from Aoskar worship.

In short, Aoskar wanted Sigil, but knew better than to try to take it himself. He simply encouraged his followers to spread the faith, slowly and quietly, from the Great Temple of Doors in the Lower Ward. The god of doors eventually became the unofficial patron of the City of Doors. Eventually, even the dabus began to worship Aoskar, and in time one of their number assumed the portal-god's priestly robes.

The extent of the Lady's displeasure is best not discussed in any detail: suffice it to say the Great Temple is now the Shattered Temple of the Lower Ward, and the dabus no longer worship Aoskar. Many other followers also abandoned the god, and the dabus calmly, steadily removed his image everywhere it appeared in Sigil.

Aoskar's withered husk lies on the Astral, where it has drifted for long years. His followers are very few and very peery, for they are hunted ruthlessly and often sentenced to a gruesome death by the Wyrm for their beliefs. Nevertheless, they do seem to know some of the secrets of the gates and portals, for they know both keys and locations to portals that not even the Guvners suspect. A few barmies claim that Aoskarians can even somehow create gates, but such rot is deeply blasphemous and never whispered within the hearing of the dabus or the Harmonium.

Alchemists still seek the blood of Aoskar, a substance said to resemble wine. More importantly, it is said to function as a universal portal key, opening all gates. Like many rumors of the Gate-God, this is likely to be an outright lie. The truth of the cult of Aoskar is dark, and best kept that way.

Note: Aoskar originally appeared in the In the Cage: A Guide to Sigil supplement by TSR. His use here is for the purposes of providing context for the campaign only.