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Klucz is a village located near the area where the Jaruga forks off into the Ina. The villagers from Klucz joined forces with peasants from two neighbouring villages, Kačan and Porog, to fight koščej. The settlement is featured in both the short story "Cesta z níž není návratu" (included in the Stříbrný meč collection), and the graphic novel Droga bez powrotu.