You can earn Mine Keys by playing battles on the Map. When a battle offering a Mine Key appears, you’ll see a notification at the top of your screen.

Go to that zone and complete the battle to collect the Mine Key. Try to gather as many as possible while the Gold Mine event is active (72 hours).

Note: Mine Keys are valid ONLY for the current Gold Mine event and cannot be saved or used in future events. Be sure to use them before the event ends!

Learn more about: Gold Mine and How does the new Gold Mine work?