From publisher blurb: There are legends of ancient dwarven ruins, abandoned under the very mountains that once housed them. After stumbling upon a clue to the ruins' whereabouts, the players will make their way through the cliffside mines, into the depths of the mountains - where they will get to uncover the Lost City itself. Of course, all is not as it seems, and what the players know might not be what truly happened... In this adventure, where ancient technologies and magic meet, players will get to explore a sentient mechanical citadel, and discover what happened to the Lost City all those years ago… The Lost City is a science-fiction inspired adventure that incorporates futuristic elements and magical technology into an adventure your players won't forget any time soon! While this campaign takes many liberties with traditional fantasy settings, it is perfect for a mysterious one-off adventure in a world where magical technology can exist.