It began with unsettling dreams, and unnatural lights in the sky. Tempers frayed, families fractured and rulers became irate as their subjects fell to distraction and gossip. There was something in the air, they said; some malediction that threatened to turn the disquiet into dread. Waking nightmares spread across every land, promising a deathly face or the terror of oblivion. Traders and explorers carried ominous accounts through Realmgates only to find those on the other side bore disturbing stories of their own. This period became known as the Time of Tribulation, and it was well-named. Malign Portents is an 80-page hardback book containing background and rules which catapult the mortal realms into a time of grim uncertainty, as Nagash begins an aeons-long grand plan to assert his power over the dead, spreading the necrotic influence of Shyish over every realm. Of course, the visions of disaster this plan is causing have not gone unnoticed – Khorne, Nurgle, Tzeentch, Slaanesh, the Horned Rat and Sigmar himself are affected by these portents, and every faction in the mortal realms is moving against the undead hordes of Nagash.