Guild Quests are special game events that take place on a regular basis. They are limited-time events that happen twice a week. All players who are members of a guild can participate.
By participating in the guild quest, you will move up in the League of Guilds. To move to the next league, your guild must occupy a spot with a green arrow and hold it until the guild quest timer runs out. The move to the next league will take effect at the start of the new guild quest.