Proof of Play
Mystery Boxes
Mystery Boxes are how players get the chance to mine CR through Proof of Play. As you gain experience and take part across Clash Rush, you unlock boxes of randomized rewards. Some hold CR; others hold digital assets, cosmetics and collectibles. Every box is a reward. Not every box contains CR.

Earned Through Participation
You can earn Mystery Boxes through:
- Leveling up through XP
- Completing certain missions
- Participating in tournaments
- Community campaigns
- Special events
As Clash Rush grows, new experiences can add new ways to earn them.
Mystery Box Tiers
Boxes come in tiers. Higher tiers are harder to get, and more likely to hold CR and premium rewards.
CR ProbabilityVery low or no CR probability
CR ProbabilityLow
CR ProbabilityModerate
CR ProbabilityHigh
CR ProbabilityCustom reward pool
A higher-tier box doesn't create more CR. It gives you a better chance of finding a share of the CR that Proof of Play is already releasing.
Two Layers of Chance
Every box goes through two rolls. First, the system decides which tier you receive. Then, opening the box decides which rewards are inside.
- 01Earn Mystery Box
- 02Box Tier Selected
- 03Open Box
- 04Randomized Rewards
- 05Chance to Discover CR
Your Mining Badge improves the first roll, making higher tiers more likely. The tier then sets your chance of discovering CR.
More Than CR
Depending on the box, rewards may include:
- CR
- Cosmetic Items
- Digital Assets
- Collectibles
- Badges
- Platform Rewards
- Other ecosystem rewards
Higher-tier boxes can also unlock rarer or more valuable rewards.
Part of the Same Mining Pool
Every box draws on the same fixed Proof of Play emission. Opening more boxes doesn't create more CR, and higher tiers don't raise emissions; they only change your odds of finding the CR already being released.
The emission stays fixed. Your opportunity to find it changes.