The gems are the most valuable items in the game. Without them, you won't be able to develop your hero or unlock new units and buildings. Fortunately, the game offers many ways of obtaining them. Remember to analyze your expenses before spending the gems - once you let it go, there's no way back.
- Completing missions. Each finished mission in the campaign yields one gem (and some coins). In the beginning, this is the easiest and fastest way of earning gems.
- Replaying completed missions. The game offers the ability of replaying the same scenario on higher difficulty. Finishing missions on medium and hard yields one gem and some more coins. The location of the enemies remains the same; what changes are their numbers and XP levels. Should you get stuck on any mission, you can always repeat the previous ones on higher difficulty to strengthen your army.
- The Jeweler. This is a special building, where you can trade coins for gems and the other way around. If you have too many coins, or have been doing missions on the highest difficulty (for which you get only coins), this can be your constant source of gems - however, obtaining gems in this way is very time-consuming.
- Imperial Market. This is the game's store, where you can buy gems for real money. If you're willing to try this solution, you should consider the two special upgrades available only here.