I need some kind of insight on these things.
the glossary entry for the Ekkinu says they are first mentioned in 4122, one year after Kelhus learns the Daimos.
The glossary also says they are called "articles of damnation," and might relate some kind of language. Indeed, kelmomas notices them "wax bright for no explicable reason," and immediately after sees the decapitants seemingly talking to each other. Wtf.
Also the white-luck-sorweel describes them "bearing an endless descent of writhing text that only he and the Demon (Kelhus) can read. What kind of text would it be displaying that only gods and ciphrang could read?
Maybe some kind of message board from the Outside?