Robust Key Detail tab: A key made from robust materials, designed to open the chest. The fruit of *lots* of trial and error. Use it on the mayor’s house, when requested, to progress through the quest «The Lost Compass» Cost: x 1000 x 500 Production Time: 4 h Instant Upgrade: 720 Objective: Home Island: Buildings Delete Item: Yes Trade: Yes Type: Instant Upgrade Recipe 48 m x 1000 x 500 x 1