The War Against the Nightmare was a conflict fought against the Emerald Nightmare. The Nightmare Lord started attacking Azeroth soon after the end of the War against the Lich King. Though his plans had started hundreds of years before, the war itself began with people that could not wake up. They were lost in nightmares, and there was no way to let them out. A strange mist spread through the lands, a herald of the nightmares. Shadowy figures started appearing throughout the world, and eventually even attacking the people. Later, the sleepers themselves turned into sleepwalkers, attacking everybody nearby as they relived their worst nightmares.