Gold are the premium currency.
There are several ways to get gold.
It depend on the number of road. You can earn up to 12 gold a day.
By completing objectives, you can earn gold.
Gold can be bought.
Speeding up the build, trainning or hero's recovery times
If should be counted as a Formula,
For 1st hour, it cost 40 gold.
For the reminding hours, add 20 each. ( N = hours, Gold needed = (N-1) * 20 + 40 )
|Gold needed||Save Time|
You can buy another ressources with gold at the Market.