MURIAS ERBE (Escape box for rent)

One day a stranger knocks at your door. Apparently you have been chosen to inherit the precious legacy of a certain moor witch named Muria—if you prove yourselves worthy. Curiosity and ambition are piqued, and the stranger hands you a peculiar old box and explains: "In the event of my client Muria's death, her will grants you the opportunity to become heirs to her most valuable possession. If you manage to uncover the secret, you may dispose of it as you wish. If you fail, however, I am obliged to lock the box away forever." Sounds mysterious, you think, and after exchanging a questioning look with the stranger you finally nod—challenge accepted!