The path from Thaumiel to Satariel

Is said to be the Black Lodge, where many keys of black magic are working, including ventriloquism and necromancy.
So ventriloquism is not necessarily tied to necromancy, though I can see the application. When a person dies, there may be trapped air or gas, which when coming through the throat, striking the vocal cords making them seem to talk. When I drove for a mortuary company, one seemed to talk while I was driving to a funeral home, scaring the crap out of me.
So there’s that. Statues that talked were a result of ventriloquism?