Ruins of the Tomb of the Primeval Kings
The "Ruins of the Tomb of the Primeval Kings" is an unofficial name for the elite area located at the Tomb of the Primeval Kings and consists of four explorable areas that create a path to a version of the Hall of Heroes that has been corrupted by the demonic servants of Abaddon, Menzies, and Dhuum. After the corruption, large tendrils destroyed the tombs and a "Chaos Rift" appeared as the new, corrupted, entrance to the Rift.
The ruins can be reached by approaching the "Chaos Rift" in the Tomb of the Primeval Kings outpost, which can be reached from the Dragon's Lair outpost in the Crystal Desert. Accordingly, only characters who have completed Augury Rock can reach ToPK.