Leagues

The game is using Leagues as a base for matchmaking. In a Golem Challenge the leagues are also used as an indication for the difficulty.

Cards have a certain base-league that they can be acquired on, but can later be upgraded up to crystal League. If you upgrade a card to a higher League it gets an additional charge. The highest League of a card inside a deck decides on the League of the deck.

The available Leagues are:
 * Stone
 * Bronze
 * Silver
 * Gold
 * Crystal