A Key.
Keys can be used to unlock Cryptic or Demonic Chests.
Keys are used to unlock Mystery Boxes. Players can acquire them through natural game-play, such as participating in Battle or Brawls. Players can also redeem them through game rewards, or purchase them from the Shop or Tourney Shop.
Acquisition
Gameplay
| Method | Rate |
|---|---|
| Single Match | Low |
| Battle Arena | Low - High |
| Brawls | Moderate |
| Expeditions | Epic: Low Legendary: Moderate |
| Daily Rewards | Low - Moderate |
| Story | Guaranteed / Moderate |
Shop
| Shop | Exchange Rate | Image |
|---|---|---|
| General Shop |
5 Keys / 10 Diamonds 20 Keys / 35 Diamonds 50 Keys / 80 Diamonds |
 Shop: Resources (p. 7-8) |
| Tourney Shop |
1 Key / 8 RP 5 Keys / 40 RP 20 Keys / 160 RP 50 Keys / 400 RP |
|
| Packages | Various |   2017 Halloween Pack, which gave 4 Keys. |
Rewards
| Reward | Rate | Image |
|---|---|---|
| TORCH Codes | 4 Keys / Code |   |
| Special Events | Various | |
| Recruitment | Various |   Recruitment help box. Keys every milestone, more keys as more milestones. |
Trivia
If you successfully 'plunder' a chest that contains a Key, you will gain two Keys!