About the only good thing to come out of all those purple psychopaths. It allows one to transfer their personality, either in fragments or whole, to all who hear ones voice. This allows for a Myriad of effects, like surrepticiously murdering ones spouse, winning a political debate, being a jerk, sweet sweet revenge, and most important of all: avoiding death by hijacking bodies. The only down side is that it requires verbal communication, so if the target is deaf, or Hierarchs forbid mute you're screwed.