For context: The ceremony centres around a person's eighteenth birthday where their soul will be fully bonded to an Eidolon, an immortal being made of magic. A problem arises for the MC when his Eidolon never appears at his ceremony. Sounds simple enough, but I don't know what the ceremony should actually consist of. I was thinking something along the lines of a summoning ritual, that way there's a definitive point for when the Eidolon should appear but doesn't. How do you write a summoning ritual though? Sorry if this was in any way convoluted, I tried to explain what I'm struggling with the best I could without putting unnecessary backstory. If you need me to clarify anything just let me know. Any and all help is appreciated!