The Undermarket is "an otherworldly bazaar offering all manner of goods and services, all temptations a man could imagine and several he couldn’t. Anything can be purchased there if one is willing to meet the price, which is rarely monetary; blood, firstborns, and souls (yours or someone else’s) are all accepted forms of currency." It is accessible both in Countermay, where the Merchants of Esh have set themselves as intermediaries between mortals and the demonic Marketeers, and Fartherall, where access to the Undermarket has caused wars.
- Vancil, Matt, and Nathan Rice. Romance of the Nine Empires: Rules of Play. Edited by Jeff Quick, Alderac Entertainment Group, 2013.
- Vancil, Matt. The Fartherall Companion. Edited by Awen Inisfail Rowan-Nelson, Zombie Orpheus Entertainment, 2020.