The Demon Mines

Publisher's blurb:

This is the 17th follow-up adventure to the open-ended module Leilon 00: City of Adventure, which provides an overview to the ruined town destroyed by the Spellplague over 100 years ago, as well as the exploration of the city now that the effects of the Sundering have made the place habitable once again. In this adventure the PCs explore the upper area of the mines under the city and begin to deal with the demon threat that has been long brewing. It is broken down into a few sections of the extensive mining areas and old tunnels long used by the ancient dwarves, humans, demons, and kuo-toa.