Applied & Aggregate Spelunking is a guide to practical use of the Survivalist’s Guide to Spelunking (Underdark survival), with rules for all systems, including advice for their creative use. Applied & Aggregate Spelunking also includes a full-blown setting with ready-to-play adventures.
The party wanders between market stalls during the height of the selling day. Dozens of strange, unfamiliar scents and sounds fill the air. The wares are just as alien. There are crystal shards in various colors, bundles of bulbous fungi, arthropod carapaces taller than the dwarf hocking them, and many more oddities. Citizens of all different races shop alongside the adventurers. Distant colliatur, small dødeligs, and proud dweorg mingle amidst the stalls and storefronts. The rest of the underground city rises around them, proudly displaying its dwarven architectural heritage. Pillars of colorful crystal and stone loom farther into the city’s heart.
Despite its strange features and denizens, it almost feels like the party never left the surface world. Until they look up. The shadowy cavern ceiling hangs high above. If they squint, they can just make out moving shapes in the darkness up there. This is what reminds them. This city is just a tiny beacon of light surrounded by darkness.