Free Crystals - Crystal Mine
Empire Warriors TD Guide
The purple crystals are the premium currency in this game and one way to get a free batch of these is via the Crystal Mine. You can find a link to the Crystal Mine at the bottom of the map screen for the game.
There are two factors which affect how many crystals you can get; the prodcution rate, and the storage amount.
A storage level too low and you will find that your crystal mine can get full too quickly and you have to keep going back to the crystal mine to empty it and claim your free crystals.
Our suggestion is that you upgrade the crystal mine early in the game at least a couple of levels as the free crystals are pretty handy in unlocking and upgrading premium items in the game.
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