Ple-Sen
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Maps, as a concept, are fun, but consider how much they might disrupt your planned start or narrative with their effects. Personally, if I were to run a game, I thought about redesigning the maps into a separate "belief" system (similar to the Revenant), but the character could only draw one map per month. That is, instead of getting a conditional nemesis at the start of the game, which may or may not play its role, the character could get a guaranteed ambush in the current game month.