Feat: Writing On the Wall

You place hidden messages written in a runic cipher of your devising. You can cast Embed Message once per day as an innate spell. The rank of this spell is equal to half your level, rounded up, and the tradition can be any tradition for which you are at least expert in the related skill (Arcana for arcane, Nature for primal, Occultism for occult, and Religion for divine). When you cast embed message, instead of choosing a language you know for the message's text and speech, you can choose to have the message be text only, written in a runic code that only you know. You can impart the knowledge of this code to up to 5 creatures over the course of 10 minutes; they retain this knowledge indefinitely, but you can devise a new runic code for subsequent messages you wish to be encoded.

A creature can Decipher The Writing of your runic code using the same skill associated with the chosen tradition against your class DC.