From publisher blurb: Caverns of the Dorgel Mountains is/was the finale in Filbar series. It features Lexicon Meridius the Ancient Red Dragon and scourge of the Dwarf Lords (F4 & F5). This large adventure represents how I look at the difficulty of taking on the deadliest dragon of the Prime Material plane. Will your party return to the Halls of the Dwarf Lords to help aid them one more time? This adventure setting was designed for 1st/2nd Edition AD&D for the Filbar Campaign for a high level group of adventurers and DM. This adventure is easily adaptable to most any game and system. Save yourself some time and utilize it for a one shot adventure or a continuing campaign!