There are several ways to get crystals in the game:
1. Level up (1 crystal).
2. Complete raid maps for the first time (2 crystals).
3. Reach 100% complete on campaign maps (1 crystal per campaign).
4. Look for coupons in our facebook community (www.facebook.com/RuleKingdom).
5. Purchase through Google Wallet System.
Have more questions? Submit a request