6664332, the Golem Lord, was the ultimate superweapon of the dead gods, Akaerna-Sagai and Xostheron. It was never actually activated until the Great War of Lordaeron, because the amount of blood required to power it beyond immense. Xaxion Drak'eem also managed to keep it in stasis, until Xalmor Windrunner's blood was spilled. Because of Xalmor's connection to Drak'eem, the spilling of his blood in Ythan'alai broke the enchantment and it was activated by Duke Kristoff Waite. The Void God assumed direct control over it, and used to activate other golems.
After being activated, it was promptly destroyed after several brave heroes infiltrated the Core.