About Chief Challenge (needs Fission stone Items)
1. After you make ordinary strikes, some items will drop. The drop rate will be calculated independently each time. If you are lucky enough, you could get various items.
2. The rewards gained from all types of strikes will be delivered to
your mailbox after the event ends.
3. The Commander who made the last strike against the Boss willa
get a grand reward.
4. To get listed on the leaderboard, you need to meet the minimum requirements.
5. During the event, there is a chance to get Fission Stones by killing
monsters on the world map.
6. The damage rewards for individuals will be reset every round; the rewards can be collected only when the damage caused in each round meets the progress requirement. On the damage leaderboard,
Commanders will be ranked by their cumulative damage.
![Fission Stone Item 1](https://lewz.eu/wp-content/uploads/2024/06/1000009349.jpg)
![Fission Stone Item 2](https://lewz.eu/wp-content/uploads/2024/06/1000009350.jpg)
![Fission Stone Item 3](https://lewz.eu/wp-content/uploads/2024/06/1000009351.jpg)
![](https://lewz.eu/wp-content/uploads/2024/06/1000009352.jpg)