The Shadowlands is a Nexus of gateways. It is a tunnel of venturing from the land of the living and the dead and is the domain of the Jailer, prior from his accusation. Once the Jailer become unchained he would claim his throne and overthrow the seat usurped. A nexus for the traveling souls travelling across the great dark beyond back into the the world of the living.
Who the Jailer? He is no other than Argus, the Unmaker trapped in his own realm of death.
Argus as the planet, Zovaal the member of the dark pantheon.