The following activities can earn chests and Keys:

  1. Purchasing coins during the Sales
  2. Completing Events
  3. Daily Logins
  4. Just by spinning during base games!

Please note that you can open a Chest with a matching Key only. For example, you can open a Gold Chest with a Gold Key, etc. To know more about the "Holiday Treasure" feature, kindly tap on the info "i" button inside the "Treasure" icon at the bottom of the lobby!