King of Bones

King of Bones is a kill quest given by Argent. It requires killing a Boss mob. It is preceded by King's Lair.

How To Achieve
Once King's Lair is completed, venture deeper into the Empire's area. Once you see Bassrelens, it is a sure sign that the King's Throne is close. Near the throne, and Ostarion, who was sitting on it, will charge toward you and commence battle. Note, this version of Ostarion does not throw explosive fireballs, rather just uses his melee attack.

He is backed up by Skeleton Sworders, Skeleton Spearmen, Skeleton Archers, and a couple of Skeleton Magi. These Magi can blind you with their weak attacks, so even though they do little physical harm, they can hinder you greatly and leave you open to Ostarion's and his minion's attacks. Remember, you need to deal the killing blow to Ostarion, and not his minions, other mobs, other players, or environmental damage.