Limbo

Limbo is one of the three realms alongside the human world and the Underworld, and is the realm that connects the two worlds.

Environment
The geography of this realm resembles a space-like void filled with dark vortexes. A solid surface that appears identical to the environment exists in this realm, allowing Gravekeepers to traverse the region by foot. Very rarely, a Limbo Stone can be naturally generated within Limbo. It has been stated that all organisms except Gravekeepers cannot exist within this realm; even Yan Sis, who is considered the strongest demon, could not survive in a Limbo Stone dimension for five seconds.

History
During the Double Devil Arc, Ximen Guanren travelled through this realm to return to the human world after dying to Yue Wushuang's attack and being forcibly teleported to the Underworld.

During the Alternate Dimension Time Travel Arc, Ximen Guanren travelled through this realm twice after being successfully assassinated by Jian Tong twice. He also searched through this realm after Ye Yan's disappearance.