Other names: Purgatory; 0202, The Prison.
According to the plane-jumper Zinzarkus, Karkarzite is an inescapable world. People and objects can enter it but cannot leave it. In fact it seems to act as a magnet for wayward plane-jumpers, as well as attracting those who cause time-paradoxes.
According to Andron, Silas Valeron imprisoned the World Breaker here.