"Ofuda: It is made by inscribing the name of a kami and the name of the Shinto shrine or of a representative of the kami on a strip of paper, wood, cloth, or metal."

Is it thus possible for a god or shinki to make their own functional ofuda? Especially relevant for shinki, since the idea of those who can create borderlines (barriers) matches with the function of an ofuda (a barrier in its own way) came up in a tag.