Sh’Da is the Dwarven & Nomari name for the underworld. The plane of the dead, filled with horrors unimaginable, is run by Plutun, dread Lord of Sh’Da.
A few miles of the Sh’Da plane cross with living world in T’ra Penitus. To traverse this path is dangerous and most of T’ra Penitus more intelligent races tend to stay away unless necessary.
Oh..and it is very bad to steal from the plane of Sh’Da.