The Cache of Madness event occurs when a player with a high skill of [Archaeology] inspects several ancient artifacts and activates them which summons 1 of 4 random bosses. The necessary skill in Archaeology is merely 225, or above. The four bosses are Hazza'rah, Renataki, Gri'lek, and Wushoolay. Each boss will drop one of two specific pieces of loot, and one of four shared pieces, meaning that this event will drop two 353 epics and a Mysterious Gurubashi Bijou for those on the quest.