When this relentlessly clever mid-to-low-class demon bugger isn't completely screwing people over for the heck of it, he's bargaining his "immortality sludge" to potential customers/victims in exchange for various items of value.What he doesn't tell the buyers of this "immortality sludge" is that physical contact with it immediately transforms it's contacter into an - immortal, yes - but a hideously malformed demon servant, who is then transported to a section of the underworld below. sh