Named for the first leader of the bandit group the Chieftains in Gold, the tombs were legendary. For years, Deckon Thar's raiders attacked merchants between Silverymoon and Sundabar. They grew rich hoarding their ill-gotten gains in a great keep and burying their leaders in dark caves filled with unplundered riches.
The dismembered corpses were discovered, sans loot and equipment, with the message "Disturb not the Mound King" inscribed in their flesh. — Forgotten Realms Campaign Guide