Dies Irae was last seen serving as part of the Iron Warriors force that attacked the fortress of Tor Christo on Hydra Cordatus. Unlike the titan that had breached the walls of the Imperial palace so many years ago, the Dies Irae had been twisted and mutated drastically by the warp, increasing its already formidable strength with the dark power of Chaos. At the head of its own traitor Titan group, it made numerous assaults on the fortress, destroying a number of Titans and killing the Princeps in command of the Titans left guarding Tor Christo from attack. It was destroyed when a Warlord class Battle Titan engaged the Chaos Titan in single combat, heroically detonating its plasma reactor to stop the Dies Irae's monstrous power forever. Whether Moderati Aruken or Princeps Turnet were still in control of the Titan at the time of its destruction is unknown, but it is highly possible that they had been twisted by the same powers that warped their once noble Titan.
Фраза про арукена присутствует))), но он же мог спкойно хлопнуть Принцепса Турнета, и стать принцепсом...