• Keys are a special currency on the game that is used to open Brawl Boxes.
• 10 Keys are awarded upon tapping on an Event Slot when a new Event has come into rotation.
• Keys are awarded upon completion of a Brawl Event up to a limit. The amount depends on the player's performance during the match.
• 10 Keys are awarded each time a Brawler gains a rank.
• 20 Keys are awarded each time the player gains an experience level.
• Key Doublers doubles the amount of Keys you get from battles. They can be purchased with Gems and are currently the best Gem cost/benefit of the game.
• This type of purchase is quite interesting, as it feels like a “subscription” once you get used to it. If you want to progress faster, keep buying them every week.