Clan War Leagues is a league structure for Clan Wars. Once a month Clans can sign-up and fight a week of wars with Clans of similar skill level. To participate, Clans have to sign-up with at least 15 (maximum 50) members. By default all Clan members are enrolled to participate in Clan War Leagues.
Each season Clans can choose between two war sizes: 15vs15 and 30vs30. NOTE: Champion league only allows the war size 15vs15.
At the end of War Week, Clans that have earned the most War Stars are promoted to higher leagues, while others stay or are demoted. Players get resources from their attacks and League Medals based on how well their Clan performs. At the end of the Season players have a chance to be awarded bonus League Medals by the Clan Leaders or a Co-Leader.
Clans are randomly matched up against 7 other Clans in their League tier to form a Group. Clans in a Group fight each other and the best performing Clans of each Group can be promoted to a higher League.
Before a Clan has fought in the War Leagues, the skill of the Clan isn't known to matchmaking, and so the initial placing of Clans can be inaccurate. At first it is possible to face both too easy or too hard opponents, but with time the skill levels of the matched Clans will become more equal.
Preparation Day & Battle Day
Clans fight a War each day of the Season. Whenever a Battle Day begins, Preparation Day begins for the following day's War. Each Preparation Day is a chance for Leaders to finalise the line-up for the upcoming Battle Day. They select the line-up from the pool of players selected during the sign-up period.
On Battle Day players have one attack with which they try to collect as many War Stars as possible. Attackers also gain Elixir, Dark Elixir, Gold and Clan XP from the attacks, similarly to regular Clan Wars.
If a Clan wins a War, this awards the Clan extra War Stars, that will help them get promoted from their League.
Only players who are selected into the Clan's Roster can receive rewards from Clan War Leagues.
Players win League Medals based on which league the Clan is playing in, and what is the Clan's placement within the Group at the end of the Season:
To get the full reward of their Clan's placement, players need to gain at least 8 War Stars. Gaining 0 War Stars or not battling during the season only yields 20% of the reward, and each additional War Star gives 10% more of the full reward.
At the end of the Season, the Leader and Co-leaders also distribute bonus League Medals to players in the Roster. The amount of bonus League Medals as well as how many players can receive the bonus are determined by the League in which the Clan fought the Season. Each Win during Season adds one player who can receive a bonus.
Resource loot and Clan XP from attacks are rewarded from each War as in regular Clan Wars.
League Medals can be spent in the Shop in the "League Shop" tab.