Courier Station
Rise of Kingdoms Guide
The Courier Station is unlocked after the initial stages of the game. The purpose of it is to allow you to purchase a range of items form the visiting merchant with either resources or gems. The inventory changes every day but make one free refresh every time the merchant comes back with new stuff. You can pay with gems for 4 more refreshes.
It's a really handy way to get some pretty neat items utilising your basic resources.
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