Every chest are filled with Gold, Gems, Cards, and other items, and the chest has eight different types. (Quest-Point, Star, Battle Star, Silver, Gold, Rare, Unique, Epic)

Quest-Point Chest - When the player earned enough point by completing Daily Gift and Quest, player can receive the chest.
Star Chest - Stars can be collected by winning a 1vs1 MATCH. By the number of obtained stars, players can claim the star chest, and they can claim maximum 2 star chest in every 8 hours.
Battle Star Chest - There are [Light/Super/Royal] Chennel Chest. players can collect battle stars by the match result (1st: 3 stars/ 2nd: 2 stars/ 3rd: 1 star), and they can claim maximum 1 battle star chest in every 8 hours.

Silver, Gold, Rare, Unique, Epic Chest - Can be claimed by winning a 1vs1 MATCH.

Or, if you rank 3rd place or higher in the league, or if you're in the promotion status, you can claim Free, Silver, Gold, Rare chests by the final ranking. Your reward quality from the chests varies as unlocked Stadium channel.