To declare a clan war, a clan must now be level 5 or higher with 15 or more clan members. A single clan can declare war on up to 30 other clans at the same time. As before, there no limit on how many declarations a single clan can receive.
Before, a clan war would start once both clans declare war mutually, or else the war would start automatically after a 3-day grace period. Now, clans are no longer forced into a clan war, but hostility counts as acceptance: if both clans declare war mutually, or if 5 members of the declaring clan are killed by the targeted clan, the clan war begins. The clan that had war declared upon it can keep track of their PK count, and the amount of time remaining on a declaration invitation, in the War Info tab of the clan window.
A war declaration can be canceled by the declaring clan at the cost of 5,000 Clan Points, but it may also time-out if the declaration does not receive a response after 1 week.
Members of a clan that has had war declared upon it now see an identifying clan war mark on the members of the declaring clan.
During a clan war, Clan Fame being transferred due to PK between clan members now displays as a screen message and as a system message, detailing the clan, character name, and score.
A clan war ends if the declaration is not answered within 1 week or if the declaration is withdrawn.
With the changes to clan warfare, all clan wars in process at the time of the Glory Days launch are reset.