In Mobile Strike the Prison allows you to capture enemy commanders and hold them in your base.
Each upgrade level reduces the time you have to hold a commander before you can eliminate them. Once your Prison hits level 21 you are also granted additional attack bonuses for holding enemy commanders.
As you can’t shield your base whilst holding a Commander, it is sometimes a useful strategy to destroy your prison or hold off from building one. This means when you attack another base you will not capture a commander, which allows you to quickly shield before a counter attack from another alliance member is launched.
Upgrading your prison requires Golden Cuffs (along with the normal resources). You will need 20,000 in order to max this building which at a cost of 10,000 gold for 1,000 cuffs, will cost you around 200,000 gold!
The table below has the build cost for each upgrade level from 1 to 21, the build time (before boosts), buildings required and the power rewarded.
Prison Building Requirements
The figures in red have been extrapolated based on previous level data. Whilst the data should be broadly correct, the red numbers may differ slightly from the actual game figures.
We will update with accurate figures (in black) as we can verify them. Please feel free to leave any details you have from Mobile Strike by commenting below and we will update the data accordingly.