Diamonds exploration:
Use Gold coin or Bronze Coin for the exploration can get diamonds. The higher the diamond's start level is, the more rare it is, thus the higher attribute it possesses.
Diamond upgrade:
- The upgrade of diamonds need to consume other diamonds. The Attack of attacking diamonds will increase by 100 for every upgrade, while the Defense of defensive diamonds will increase by 80 for every upgrade.
- The upgrade of diamonds with high star level need to consume diamonds with low star level.
- The upgrade of high level diamonds need to consume low level diamonds.