Getting elected onto the throne as Psycho King is hard enough. To be elected you need to fake a claim AND manage to get elected without royal blood whereas evils that are converted have claims that can be confirmed AND potential to have royal blood. Furthermore you sacrifice your abilities (such as possess, bypass immunity and all sorc bombs) for the throne.
Why should PK immediately die ‘Just because’ the butler decided to randomly poison for the fun of it? Whole fake claim and hard work to be killed unknowingly and randomly by a butler’s poison.
Psycho King should be immune to butler’s poison. It’s already hard enough to get on the throne as it is.
