Death World

The Death World is an afterworld where ghosts spawn after the person's death. It's neither heaven nor hell. It and everything there is made out of the power called "the Dark Power".

The "gol" is the currency of the after world.

The Death World and the Land of the Living are completely different worlds. However they share the same space. Travelling in the Death World means that the same distance is traveled in the Land of the Living. It's only via special powers (e.g. the root that Samsin grew) that a ghost can view the Land of the Living at the same coordinate as the ghost currently is in the Death World. However despite sharing the same space and a ghost is susceptible to powers of the earth, the creatures and objects on earth cannot react to a ghost's power (i.e. a ghost can be blocked by a wall on Earth but cannot be moving things/opening doors).

Reapers are given special powers during a sudden death mission so that they can go through door-formed things without needing to open it, or to exert physical force over those they will have to kill suddenly.