Under the command of Kael'thas Sunstrider, Pathaleon the Calculator summoned a powerful colossus to gather the arcane energies flowing from beneath the Mana Tombs. Tavarok has unexpectedly been transformed by the unique emanations, losing the red-tinged corruption of Pathaleon's influence. The white colossus has gained his own free will and uses it to greedily consume all who would stand in his way.