From the Publisher's Website:
Time to shred some sanity! If you thought the Externals from the Flux Horrors Booster were bad before, this 17(+) card Booster will make 'em worse! Powers like Insane Aura, Soulless Touch, Feed on Sanity and more await within! Transform your villains into paragons of Untold evil!
A deck of 17 additional cards for the card-based RPG, Untold.