Extend Tower Capacity
The Extend Tower Capacity option can increase the amount of hidden population, that your Tower can protect, by 100% for 7 days. You can see how much the capacity of your Tower is before and how much it will be after extending it.This option costs 100 Coins and extends the Tower's capacity in all Castles you own.
IMPORTANT: Please note that if you buy the Tower extension more than once before the 7-days period has expired, the capacity will not be extended by another 100%, only the duration of the option will be extended.