This brings me to a post-canonical debate about the possibilities of post-Jhana iddhis. I'm not sure if it was in the context of "transfer of merit/demerit" or simply benefaction versus malediction.
Anyway, the query was asked as to how benefaction was possible, and post-Jhana iddhis was proposed. The doubter then asked if it was then also possible to use post-Jhana iddhi for malediction. The answer was that malediction requires vyapada, and if that hindrance could creep back in, the basis for the iddhis would have evaporated.
Does anybody have the reference for this? There's a little debate going on in our sphere, and I wanted to be certain of what that text actually said, before I misquoted.