The original king cannot be these.
The reaper and possessor would become the tyrant king:
The tyrant king
Neutral special
goal: kill everyone who does not need to survive
passives: immune to death and being occupied, pass the torch
Night ability one: guards! same as current. -2 uses
Night ability two: executioner send your loyal executioner to kill your target. Physician will be occupied if they attempt to exhume them.
Day ability: Royal finger your next accusation will count double
Day ability: Decide Fate same as current
If you are wondering why he has guards even though he is death immune, it is so players cannot test of he is the tyrant by asking to send guards.
I don’t like neutral killers having an easy out in becoming a neutral king. The tyrant king would be fairly simple to implement (I think i’m not a techno wizard) and increase the tenseness of games.