Bosses are strong opponents accompanied by two groups of allies. To fight the boss, 1 stamina is required.
Only the leader of a clan can activated the boss fight (and the leader must unlock the corresponding map region first). There is a limited amount of time to defeat the boss. Each boss can be defeated every five days. Different boss fights can be active at the same time.
You will be credited with the points of progress for the victory over each group of boss allies. To defeat the boss, you need to accumulate a certain number of such points, so that the contribution of each member of the clan is important.
Reward is the clan currency and it is given after the victory over the boss and distributed equally among all members of the clan. There is also an additional reward which depends on the player's personal contribution to the victory over the boss.