I began working on the inscriptions as I needed to not worry about the town while I'm focused on other matters.
The basis of the formation needed to be a protective one to enable people within it to not suffer at the hand of a random cruel cultivator. So I had to begin by writing the strongest defensive Qi formations I could think of.
The idea was to use master Rain's own inscriptions to lay the foundation of the inscription. I hardly doubt anyone would be able to disable this formation if it has the layout of Master Rain's work, however, if I'm unlucky and someone with actual knowledge of his work comes by, it'll all be for naught.
So, I had to mix and shuffle more complex formations into the final work. This way it will be a dozen times harder for even a disciple of Master Rain's teachings to breakthrough.
I began working on one of the most complex and convoluted formations I could ever hope to create.