So my PCs have decided to take on Zelmisdria the succubus and her green dragon buddy in the gap between the Herald getting nabbed and being called on to go and fix things. (Wanted them to have some time to get reacquainted with the Worldwound rather than the Abyss). What sort of things should I fill the dragon pile with? And what kind of cool lair could the succubus have? I'll have them fight elsewhere, but finding the lair would be cool so just some descriptive stuff, interesting prisoners, cool evil items, would be great.