What does the mudra reveal about the cult of bezeban, the kidnapping of princess batcheat and what does a follower of bezeban have to do?

The mudra reveal the fact that it is no longer possibile to tell which is Khattam-shud's shadow and which his substantial Self because he has separated himself from his shadow.

Mudra doesn't say anything about the princess because she doesn't play an important role.

The flowers of bezabean have to stay in silence and follow Khattam Shud's rules.