Dungeon - Special buildings | Dungeon - Buildings Heroes VII Guide

Remember to sell only the items that none of your heroes is or will be using.

The Dungeon has the most special buildings of all the factions. These buildings give various additional options. First one is the Black Market which allows you to sell and buy artifacts. The price of a sold artifact varies from 300 to 600 gold. If you want to buy an artifact, you must pay at least 2000 pieces of gold.

Remember that the number of available spies is limited to 4. Additionally, a spy mission lasts at least few days.

Other two buildings - Spies Guild and Hall of intrigue - are focused on unlocking new options related to the Thieves Guild. Thanks to them you can not only gather information about enemies, but send spies on missions to sabotage the dwellings and plunder enemy mines as well. Plundered mines will stop generating resources for few days and you will receive few pieces of a resource. Sabotaging will remove half of the units from one random city dwelling.