So I propose something like this:
-Player A kills Player B
-Player B is now dead, and a corpse is left.
-Player A must now bury the corpse or suffer a potential debuff (some sort of disease)
Mass graves would cause the deceased to have no alterations to their LP inheritance other than whatever they had to begin with, however a proper burial could increase the LP inheritance if the new player ventures out to visit his ancestors grave.
Perhaps this could also apply to animal corpses? Only, no proper burials for animals. They have no souls
