What is the range for a Shedite/Kyriotates possession resonance? How about for Song of Possession?
Use the Resonance modifiers on p. 57 with the limitation that is common to most demonic resonances – i.e., you can’t use a recording of any sort, but live transmissions are all right. (GMs may wish to deprive Shedim of the ability to use even live transmissions for their resonance.) Note that Shedim cause disturbance when they go between hosts unless they are “oozing” – touching the new host with the old one (since they would otherwise have to go celestial). See the Infernal Player’s Guide for exact oozing mechanics.