Paizo's adventure module 'The Harrowing' fits as a perfect sidetrek into 'The Curse of the Crimson Throne' adventure path. Looking for the disappeared fortune-teller Zellara, the PCs are drawn into the Harrowed Realm, a demiplane that is bound to the soothsayer’s deck of Harrow cards. In search of another blood coin, the companions travel to the Smith’s Caldera, where they find a massive metal head poking through the wall. Drawing the card of the ‘Mountain Man’ from their Harrow deck gets the head to open its mouth. Miniatures and scenery are by Dwarven Forge, Psomminiature, Twisting Catacombs, Reaper and Warhammer. If you want to find out more about this fantastic adventure, you can go to the campaign journal section of Paizo's messageboards under MrVergee's Curse of the Crimson Throne.