Cannon Tower Construction Kit Detail tab: Use on destroyed defense towers to complete quests. This buff is only usable in the Twin Town adventure. It’ll be deleted when the adventure is no longer active. Cost: x 2000 x 1500 x 100 Production Time: 15 h Instant Upgrade: 320 Objective: Adventure: Buildings Delete Item: Yes Trade: No Type: Instant Upgrade Recipe 3 h x 2000 x 1500 x 100 x 1 x 2000 x 1500 x 100 x 1