Forgotten Map

The Forgotten Map is a unique type of skill that can only be used once per run. It is found behind a gold door in the Specialist Shop of the Prisoners' Quarters. Although it is of purple color, it cannot give the player any Tactics stats, but grants a small % of passive damage reduction.

Details
Using the Forgotten Map reveals the full layout of a biome, with its exits and boss cell doors, as well as any scrolls, starred enemies (carrying scrolls, legendary items or a corrupted artifact) and loot including within secret areas.