While this won’t be everyone’s cup of tea, I modified the story of Aoskar a bit:
In my mind, the conflict between Aoskar and the Lady of Pain happened BEFORE there was a Sigil.
Aoskar was the deity of portals, planar travel, and unraveling puzzles.
As planar travel is a VERY desirable portfolio, he got into conflict with a deity from Acheron who wanted the power to send his legions anywhere in the multiverse at will. For his assault against Aoskar, he recruited a proto-bladeling and imbued her with intense levels of divine power so that she could lead a second front against Aoskar.
In the resulting battle, the Acheron god was killed. But while Aoskar was preoccupied with finishing off this bellicose god, the proto-bladeling avatar struck from behind and was able to slay the weakened Aoskar (although she also died in the backlash of divine energy)
So like all dead gods, Aoskar appeared on the Astral. But because of the residual power, the people that visited his dead body found that very often portals would appear and allow visitors easy means of travel.
[This was in the days before Anubis set himself up as the protector of the dead gods or else, the exploitation of these portals would probably have come to naught]
Soon a trade community was settled on the dead god and was growing exponentially. Then something odd happened
What happened that while most had forgot who Aoskar was, the residents and visitors believe so strongly in the power of their trade city and its portals that the body changed shape and actually shifted to the Outlands.
**SIGIL IS THE BODY OF AOSKAR HIMSELF!
At first, the collective belief in the portals was enough to transform Aoska from being dead to a comatose state (he was “alive” enough to be shifted out of the Astral but not enough to revive him).
As the popularity and the power of “Sigil” grew, the next aspect of Aoskar to revive was an avatar.
Instead of a standard avatar, Aoskar’s avatar manifested in the body of the proto-bladeling that had struck him down (because of the backlash of divine energy that had been absorbed). This of course was our beloved Lady of Pain.
So now, the Lady found herself in an odd situation. If she drove off all the populace of Sigil (which she would LOVE to do), then Aoskar would be de-powered and, in turn, she would die again.
On the other hand, if Aoskar grew in power; then he would regain sentience and the ability to act for himself. But if that were to happen, one of the first things he would do would be to make his killer suffer.
So the Lady had to balance her need to keep the city thriving but also curtain any resurgence of religious belief in Aoskar. She needs to stay in the city to curtail any growth of Aoska's power (or perhaps her unusual avatar-nature means that she can't leave). So she is trapped in her own Cage.
My story explains a few things:
-Why can’t gods manifest inside Sigil? Because Sigil IS a god (albeit a comatose one) and gods can’t manifest inside each other.
-Why the Lady hates Aoskar so much
-Why the Lady creates Mazes – as the avatar of a god who had the portfolio of unraveling puzzles, she is able to create Mazes, which while difficult always have a solution
-What are dabus(es)? They are weaker avatar manifestations of Aoskar (and they are what his real avatar would look like if the Lady hadn’t absorbed most of the avatar power). This also explains why they speak in rebuses, which are a form of visual puzzle, which fits in with Aoskar’s portfolio
-Why is Sigil called Sigil? As he first stirred in his coma-like state (before he was strong enough to summon an avatar), Aoskar tried to communicate with the populace and this communication appeared as sigils found suddenly appearing throughout the city. (Similar to the rebus-speak of his avatars)
I think I had a few other connections that were explained by this but that’s all I can recall at the moment.
So is this an intriguing possibility or just garbage?
If you like this idea, it also raises the interesting idea (or adventure campaign) of what would happen if Aoskar DID revive?
How would the multiverse change if Sigil was no more?
How would the multiverse change if a powerful (and probably much more self-protective now) god appeared that had complete control over planar travel?