Hand of Evil said:
What would happen in your game?
What would be the ramification of the death of a god/goddess in your campiagn? Would faith crumble, would there be riots in the street, would there be an movement to other gods/goddess, would crops fail and animals run wild?
There are 2 forms of divinity in my game: Spirits (a mortal who embodies a concept) and Gods (beings whose souls are tied to a demiplane).
Death of a spirit, though rare, has only social impact on the world as the worshippers follow the still-intact concept. Faith continues, though the church changes to focus on the "eventual arrival of our new Spirit." How the spirit dies may cause some turmoil ("your spirit murdered our spirit!") but it's transient in general.
Gods are dang hard to kill as IMC the demiplane will try to regenerate them. If a diety just loses all its avatars it's life as usual for the month or so it takes the plane to generate a new one. Should someone be actively fighting for control of the plane, the followers lose virtually all magic while god's soul exerts all its energy to survive. This shouldn't affect the functioning of the world as a whole but divine artifacts could lose power and evil gods may call to their clerics to perform sacrifices to provide energy.
Since gods are followed as individuals, the religion will fade if the god goes too long without reappearing. Riots are possible (think "Rodney King" on a godly level).
Would the worshippers even known? How about the demi-gods?
The laity won't know unless the clerics tell them. Clerics and Adepts will be able to sense the "unfocused" nature of their religion in the case of a spirit. Priests of gods won't notice the death of avatars but will feel something unpleasant if the god is being supplanted.
What would be the effects on the other gods and goddess, would they fight for the worshippers, would they elevate a demi-god, would there be elections or fighting?
Spirits may or may not care, it depends on the politics. Spirits really don't oppose each other as much as the gods do. They can't elevate someone or create a new spirit, they have to wait for someone to naturally assume the role.
A minor godswar will break out while the victims' allies do their best to free them before final death arrives. Control of the followers may be important, though most would either rally them to provide support to their god or attempt to demoralize them and hasten the death.
Elevation of another may occur but it involves one (or more) gods giving up a share of their power so it's not high on the list.