Once the players have gathered enough crowns for the maximum reward, or the three days has elapsed since the season reset, the Clan Chest will be available for opening. The amount of Gold and cards offered do not differ between players, but its contents will differ depending on the Arena the player is in. For example, a player in Arena 7 will not be able to obtain cards from Arena 8 through the Clan Chest.
To earn the rewards from the Clan Chest, a player must remain in the Clan for the duration of the three days and contribute at least one Crown to the chest. A player that has just joined the Clan must wait until the next Clan Chest is available, regardless of any previous contributions.
The Clan Chest was added to the game in the December 2016 Update, and the first Clan Chest rotation had begun on 19/12/16 at 12:15 AM (EST).
On 13/1/17, a maintenance break overhauled the Clan Chest:
The Clan Chest rotation would begin once a week starting on Mondays, the first being on 16/1/17 (formerly once every two weeks)
It lasts for 3 days (formerly 7 days)
It requires 1,600 Crowns to reach the maximum reward (formerly 3,250)
It contains 1,620 Gold and 270 Cards at the 10th tier (formerly 3,150 Gold and 525 Cards)
Similar to a Challenge Chest, every 10th card is a Rare card and every 100th card is an Epic card.
The n-th tier of Clan Chest requires crowns total and rewards Gold and cards.