Sigil, The City of Doors

The ruler of Sigil is the mysterious Lady of Pain. The Lady is sometimes seen in Sigil as a floating, robed Lady with a face bearing a mantle of blades. The Lady does not concern herself with the laws of the city; she typically only interferes when something threatens the stability of Sigil itself. However, she is an entity of inscrutable motives, and often those who cross her path, even accidentally, are flayed to death or teleported to her hidden Mazes, lost forever. It is widely believed that she never speaks, although some unconfirmed (and, most would argue, highly questionable) rumours to the contrary do exist. Sigil is also highly morphic, allowing its leader to alter the city at her whim.

Sigil is, theoretically, a completely neutral ground: no wars are waged there and no armies pass through. Furthermore, no powers (such as deities) are allowed to enter into Sigil; the Lady has barred them from the Cage, some disguised avatars (and Vecna, see below) have made it in and been promptly dispatched by the Lady. Sigil is hardly peaceful; with such a condensed population, consisting of everything from angelic devas to demonic glabrezu, violence is common, usually befalling the foolhardy, the incautious, or the poor. Most natives of Sigil ("Cagers") are quite jaded as a result of living there.

People coming to Sigil from the Prime Material Plane are often treated as clueless inferiors by the planar elitists who dwell there. They are thus widely referred to as the "Clueless".