Long ago, the Titans empowered five dragons with unique abilities and powers, entrusting to them the protection of Azeroth itself. While each had their own specialization with its own odd foibles, none were as strange as the task set to Nozdormu. Aman'Thul, Highfather of the Pantheon, entrusted Nozdormu with the task of watching over time -- to guard the myriad paths of time and keep them pure. A strange task, to be certain, and one with a heck of a lot of power involved. To keep Nozdormu from abusing that power or thinking that he answered to no one, he was given the knowledge of the exact moment of his demise.
Yet somewhere in one of those myriad timelines, this apparently wasn't enough. Somewhere, somewhen, Deathwing prevailed and brought about the Hour of Twilight, leaving Nozdormu a haunted, twisted version of his former self -- a version that cared little for the restrictions or rules bestowed by the Titans, and cared much more for preserving his own skin and preventing his own death. The twisted version called himself Murozond, first of the Infinite Dragonflight, intent on bending time and changing events solely for the purpose of evading his inevitable demise. We defeated Murozond in End Time, and prevented the Hour of Twilight from taking place. But have we actually saved Nozdormu? Have we secured time itself?