Editing D&D5:NoMansLand (section)

====The Afterlife and the Flow====
When a creature dies, its soul enters of the flow of energy that courses through the world until it is reborn. This might take a matter of days, weeks, months, or even years. While a soul is in the flow, it can be reached by such magics that allow one to commune with the dead. It is even possible, though risky, for sufficiently powerful magic-wielders to enter the flow and seek out an as of yet unreborn soul.

As such, there is no concept of an 'afterlife' in the World, just of an unending cycle of death and rebirth. The exact number of souls in the world, and whether it is possible for a soul to be reborn as a higher or lower creature, is the subject of much religious debate.