During the Horus Heresy when the galaxy was torn apart by strife and civil war, both Loyalist and Traitor forces of the Centurio Ordinatus unleashed all manner of forbidden and experimental weapons upon one another. Such were the gifts that the Renegade Forge World of Xana II offered; no less than three such terrifying weapons of the Ordinatus Ulator pattern, fully battle ready and armed with devastating sonic destructor weapons. These were Titan-killers, slaughterers of armies, each powerful enough to turn the tide of a battle at a stroke, and in potency far beyond any super-heavy tank and dwarfing the firepower of even the mighty Diamatine siege-guns that had fallen into the grasp of the Iron Warriors earlier in the Horus Heresy.