From Tribalwars Wiki EN
Gold coin system information
There are three requirements that must be met before you can create a nobleman.
- You need enough farm space - noblemen require 100 farm space in order to be built.
- You need to have enough gold coins stored. Coins are minted in the Academy and typically cost 28000 30000 25000. The first noble you train will require one coin, the second two coins, and so on. This means by the time you've trained your third noble you will have minted at six coins (1 + 2 + 3 = 6).
- You need enough resources to train the nobleman: 40000 50000 50000.
As worlds progress the cost of gold coins normally is reduced by the game management team. However, some worlds do launch with reduced costs.