Incarnation of Evil

Satan is the incarnation of evil that evokes the hidden evil in mortals. The office of Evil is taken by a new mortal office holder by vanquishing the former and then either claiming the office immediately or the power of the office seeks the most evil person on earth. Either way, the new office holder is given 30 days to prove himself and his control over Hell by maintaining the lie that Satan has the power to destroy demons. Should the lie be exposed, then no incarnation of evil would ever again be able to exercise proper power and control over Hell. If one succeeds then they hold the office until overthrown, but failure means the previous incarnation has a chance to reclaim the office for themselves since they are not truly damned souls and because his powers are based on lies and illusion. He is capable of transfiguration, invisibility, memory and vision manipulation and shape shifting and withdrawing information.
In the book For Love of Evil, the post is taken by a mortal named Perry, who takes the post and meaning of the office as not necessarily combatting God, but rather promoting evil on earth as a necessary function of the creation to sort souls into Heaven or Hell.