Excavation Tools Detail tab: Use on an Abandoned Stronghold in the venture «Mountain Labyrinth» to perform an excavation. This is a venture buff that’s only usable in a certain venture. It will be deleted when the venture is no longer active. Cost: x 7500 x 5000 x 1250 Production Time: 8 h Instant Upgrade: 137 Objective: Adventure: Buildings Delete Item: No Trade: No Type: Instant Upgrade Recipe 1 h 20 m x 7500 x 5000 x 1250 x 1 x 7500 x 5000 x 1250 x 1