JacktheRabbit
Explorer
If you want an absolute official way to destroy the Lady there is not one per say. The closest you could come to it is to make her irrelevant. To do this one would have to map out every portal in Sigil. Then travel to the other end of each one and close it up.
Block one with 50 feet of rock so anyone going through instantly dies. Reroute a magma flow to go over another one. At the same time put a anti-magic field over the portal on the side you close up.
Now travel to and from Sigil becomes impossible. Since portals are the only way in and out you will have effectively destroyed the Lady by making her and her entire city completely pointless. Nowhere in any of the rules does it say that the Lady has power ouside of the city or that she can create new portals. She merely has control over the existing ones.
Would this work? In theory yes. But there are thousands of portals and its not known if all of them are even known about. So it would be impractical. I would take legions of creatures or thousands of years. But then both are a commodity that fiends have at their disposal.
Block one with 50 feet of rock so anyone going through instantly dies. Reroute a magma flow to go over another one. At the same time put a anti-magic field over the portal on the side you close up.
Now travel to and from Sigil becomes impossible. Since portals are the only way in and out you will have effectively destroyed the Lady by making her and her entire city completely pointless. Nowhere in any of the rules does it say that the Lady has power ouside of the city or that she can create new portals. She merely has control over the existing ones.
Would this work? In theory yes. But there are thousands of portals and its not known if all of them are even known about. So it would be impractical. I would take legions of creatures or thousands of years. But then both are a commodity that fiends have at their disposal.