When a player wins a tournament, they will obtain a 'custom chest', which takes a certain amount of time to open depending on the customized of the chest. This feature unlocks after reaching Arena 4. Chests take a certain amount of time to unlock: Skeleton Chests rewards is skeleton cards, Spell Chests rewards is spell cards, Royal Chests rewards is royalty cards, Multi Chest rewards is 10k Commons + 5k Rares + 200 Epics + 50 Legendaries + 900k Gold + 7k Gems, while Frozen Chests rewards is 1000x Ice Spirits an 500x Ice Golems. Multi Chest's cards can be contain from any arena. Gems may be used to speed up unlocking or can be used to purchase a chest.