Age of Sorcery
The mortal icons are exceptionally powerful or influential humans.
Mortal icons are not considered Heroic or Villainous, since what a given peasant thinks of them is very likely to depend on which kingdom the peasant lives in.
Supernatural icons embody some purpose or concept that is beyond mere Earthly concerns. Most supernatural icons can be considered Heroic (having humanity’s best interests at heart), or Villainous (crushing mortals because it’s fun, or they’re simply in the way). Of course, the varied nature of humankind’s allegiances means that the way a given icon is viewed likely varies from culture to culture. Muslims don’t care much for The Pope, for example, and Christians frequently think anything not Christian is just another persona of The Devil.