The subject of this article or section is part of Midsummer Fire Festival, a seasonal event that lasts two weeks. Once the event has run its course, this will no longer be available until next year, but there are no guarantees.
King of the Fire Festival
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Complete the quest, "A Thief's Reward", by stealing the flames from your enemy's capital cities.
King of the Fire Festival is an achievement awarded for completing the quest A Thief's Reward, which is offered once a character has completed all four "Stealing <city>'s Flame" quests. Since A Thief's Reward is immediately available to players who have completed the flame stealing quests in previous years, a player who did so before the release of Wrath of the Lich King will be able to quickly earn this achievement without re-visiting the enemy capitals. Completing this achievement is an objective of the meta achievements [The Flame Keeper] and [The Flame Warden].
In each case, a city's flame is stolen by clicking on the (aqua/blue tinted flames) of a city's fire. A quest starting item will appear in the character's inventory that offers the appropriate quest.