Survivalist's Guide to Spelunking Limited Edition RPGLimited Edition version. The Definitive Guide to Underworld Survival! This tome contains the collected wisdom of legendary dwarven delver Dugmore Dumple. Dugmore takes you through crystalline caverns, fungal jungles and maze like passages of his home beneath the surface, even skirting the upper regions of Hel itself. Survival in the Underworld is no mean feat, but this massive tome contains all you need to exist and endure, nay, prosper in and profit