Spreading a message is actually a simple matter, especially when Amberser had a friend who was very good at writing stories.
Hake Stone was dragged over by Amberser to spin a tale around the concept of "Lighting two candles after dark and reciting an incantation to a Magic Mirror will summon an all-knowing Devil."
The story had to be captivating, making the reader unable to resist trying the incantation themselves.
Initially, Hake Stone wanted to say, how could it be so simple to spread an incantation? Wasn't that asking too much of someone?
Later, Amberser gave him an idea to write the protagonist as a down-and-out alchemist, who because of failing an exam could only remain an apprentice until he peeked at his master reciting an incantation to the Magic Mirror at midnight and discovered that all of the master's knowledge had come through dealings with a Devil.