The Cult of The Creator is a religious cult of people who worship a being known as The Creator.
Deity: The god of names, insanity and magic
Titles: The Creator, The Keeper of the Book, The Ruler
The Creator is known best for creating The Red Book and, later, the sixteen books of fates. The book of darkness was created shortly after his magic drove him insane and the books of fates were created...
“In ancient times, a powerful magic being lived and walked on Ouran. He could control all magic but his own, and, as he knew would happen, his magic devoured him, leaving insanity in its wake. His thoughts were plagued with darkness, and with this darkness he created a book. A book with the power to destroy all that exists. Only, no-one can read it, unless the book allows them to read it.
Next, he created the sixteen books of fate. Only he could write in those books, but anyone could read the pages. He wrote in his own destiny, in which he was a god; a creator and a destroyer. He left the books behind with his disciples and they sworn to protect the books with their lives.
They stored the sixteen in different temples all over Ouran, hidden away and safe, but they didn't hide the book of darkness. It left them, because the magic had given it its own mind, and they didn't find it again.”
To join the cult of the creator, the person must have magic and be willing to let it take control of them. They need to take care of the Creator's books.