The Undercity Market is a fascinating, subterranean frontier town located directly beneath the cobblestones of Midtown. While the surface world belongs to the rigid law of the Western Empire, this sprawling dark-market operates in a legal gray area, existing completely out of sight of the sun. It serves as the primary staging ground, rest stop, and trade platform for explorers before they plunge into the lethal, monster-infested depths of the lower Dungeon layers.
The market is built within a massive, high-ceilinged cavern of natural stone and ancient, repurposed dwarven foundations. Instead of sky and clouds, the district is blanketed by a heavy ceiling of carved stone braced by colossal wooden pillars and iron scaffolding. It is illuminated entirely by flickering green alchemical torches, magical light spells, and bioluminescent fungi cultivated by outcasts. The atmosphere is thick with the smell of underground moisture, woodsmoke, and roasting cave-beasts. Because it sits on the threshold of the deep ruins, it is a melting pot of strange subterranean ancestries, eccentric scholars, and heavily armed adventuring parties counting their gear.
Prominent Locations
-
The Delver’s Stair: The primary public entry point to the district. Located in the center of Delver’s Square in Midtown, this wide, heavily worn stone staircase descends deep into the earth. It is constantly packed with a two-way traffic flow of eager, fresh-faced adventuring parties marching down into the dark, and bloodied, exhausted survivors dragging sacks of gold back up to the surface.
-
The Gilded Pick Tavern: A rugged, rowdy tavern carved directly into a natural stone alcove. It serves as the unofficial town square of the district, where delvers hire subterranean guides, trade maps of newly discovered sewer layers, and recount harrowing tales of near-death experiences in the deep vaults.
-
The Long Vaults: A permanent row of iron-reinforced stone vaults lining the eastern wall of the cavern. These secure chambers are managed by independent, heavily armed dwarf clans who lease out high-security storage spaces. For a monthly fee, adventurers can safely lock away bulk treasure, heavy skymetals, or volatile artifacts without risking them being stolen in the surface markets.
-
Outcast Alley: A dark, narrow stretch of tents and stone stalls on the fringes of the main market square. It is the one place in Ptolus where subterranean ancestries—such as Orcs, Goblins, and rare subterranean wanderers—can openly trade their specialized cave-goods, deep-sea salvage, and rare underground alchemical components without facing the immediate hostility or heavy taxation of the surface City Watch.
Prominent People
-
Gorgon Iron-Sigh: A burly, stone-faced dwarf merchant who runs the most successful equipment depot in the cavern. Gorgon specializes strictly in subterranean survival gear—selling heavy iron pitons, rare darkvision elixirs, specialty mapping scrolls, and consecrated iron spikes to ward off spirits. Mechanically, he is an expert Fighter with a Crafter dedication. He is incredibly knowledgeable about the physical layout of the upper dungeon layers and will pay a premium for accurate mapping logs brought back by delvers.
-
Sly-Foot Vane: A highly eccentric, twitchy goblin rogue who operates as an independent guide-for-hire from a corner stool at the Gilded Pick Tavern. Vane has survived the deep ruins for over a decade and claims to know the safe paths through the ancient warrens of Ghul. Mechanically, he is a mid-level Rogue (Thief racket) with a legendary score in Stealth and Dungeoneering Lore. For a steep cut of the treasure, he can be hired to disable complex mechanical traps and navigate parties safely past territorial monster lairs.
PF2e Mechanical Identity for Vault Tagging
Behind the GM screen, use these Pathfinder 2e baselines to flavor Undercity Market encounters, subterranean trading, and deep exploration prep:
-
Common Ancestries: Dwarves managing vaults, Gnomes tracking underground anomalies, alongside high populations of independent Orcs, Goblins, and outcast heritages who prefer the comfort of darkvision environments.
-
Prevalent Classes: Rangers (with underground terrain specializations), Rogues (Thief or Mastermind rackets dealing in black-market relics), and Alchemists brewing specialized subterranean elixirs.
-
Everyday Magic Context: Divine items and curative magic are exceptionally expensive here, but specialized dungeon tools like Tanglefoot Bags, Alchemist’s Fire, and minor utility scrolls are widely available.
-
Encounter Dynamics: Direct violence inside the market perimeter is strictly discouraged by an unspoken pact among the resident merchant syndicates and dwarven clans, who employ high-level, darkvision mercenaries to instantly execute troublemakers. However, just past the boundary markers of the market gates, the environment immediately shifts into the lawless, unpredictable danger of the open Dungeon.