How do I write a fictional religion?
I’m not sure if this is the right flair.
I’m working on a story that is very reliant on a fictional religion, but I don’t know how this religion would affect the people of the kingdom. I would also like to improve the background story as well.
The religion was fabricated during a war that took place a few hundred years before current day. A ritual started when the oldest (and particularly popular) royal son fell ill during the war, and due to loss of resources, he could not be healed. To bring hope to the kingdom bereft of stability, the king held a public ceremony of the passing of the prince. The king gave the prince a small bottle of something resembling an elixir and told the people that he would transcend to the "next realm" and become a god who would forever watch over the kingdom. To support the belief of this ceremony, it was repeated with each royal child to follow. Instead of being given an “elixir” they are simply poisoned. When the current ruler is near death, they pass the knowledge of the partial truth to their successor who then continues the ceremony with their remaining siblings and then their children. The ceremony takes place on each royal child's 24th birthday, as that was around the time of the first ceremony. The belief is that the “ascended” royals watch over and protect the kingdom. The kingdom is completely walled off and separated from the rest of the world. Magic is pretty normal outside of the kingdom, but within the kingdom all magic is seen as evil and dangerous.
I have researched some things about religions, specifically polytheistic religions, but I don’t know of any real religions where people are believed to become gods. Mostly I don’t know how this belief system would shape the society within the kingdom, but I also don’t know how it would be a believable “religion” as I don’t really know the actual origins of most religions as that would probably disprove them. Since most religions have priests of some kind, would that likely be a thing? And if so, would it only make sense to be the magic users who are believed to perform the ritual? I also don’t know what the belief around death for the majority population would be, but outside of the kingdom the general belief is that your body gives back to nature after you die.
Edit: the part about it being every royal child will probably change. I’m working on a way to decide who will take part in the ceremonies in a way that still works with my story.