It would be cool to create some kind of feat or spell to let a dark creeper create a ghost sound-like effect via whispertongue whereby they affect an area with their whispertongue and then choose a unique message that each creature within the area hears, or some similar misinformation-themed power.
As you wish sir!

I added a feat called ghost whisper that i think has a very cool effect and i created a spell called false darkvision, that is not what you requested, but i think is is cool.

I also added some changes to the false body item.