Editing Shattered Imperium (section)

===The Fault In The  Stars===
On Davin, Horus is seduced to Chaos by his brother Lorgar. Magnus is never made aware of the peril his brother faces as he is away from Prospero. The Alpha Legion arrive soon thereafter, already twisted to the Malign will of Tzeentch by their quest to understand Chaos. Together, four Primarchs plot their Heresy.

Magnus joins Ferrus Manus and Fulgrim in a joint crusade to crush an Eldar Craftworld. While there, Magnus discovers that Fulgrim has been tainted by the malign influence of a daemon-blade. He informs Manus and together they help stop the insidious creep of Chaotic influence over the 3rd legion. Magnus explains what has happened to his deeply concerned brothers and explains how he has saved Fulgrim from possession. Fulgrim devotes himself to Magnus' cause. Ferrus Manus takes more convincing but ultimately agrees that psykers are more powerful and so must be made superior. Together, they plot a new future.

Mortarion meets with Perturabo and Angron. The Iron Warrior is attempting to rid the Red Angel of his Butcher's nails using a bizarre new invention of his. Mortarion and Perturabo are overjoyed by the apparent success of the procedure, but it isn't long before Mortarion begins discussing the results of the Nikaea conference. Perturabo is dumbfounded by this revelation. Together, the three Primarchs agree that they must save Humanity from the madness of Magnus the Red and the Emperor. But first, Perturabo wishes to Seek out the mad Primarch Curze, and cure his insanity

In the deep, Russ and Lion El Johnson battle over past wrongs and minor slights. Both of them are driven by a sense of betrayal. the Lion is furious that Horus Lupercal, not he, was made Warmaster. The Wolf refuses to allow Maleficarum to take hold of his legion. Both Legions throw off the shackles of imperial law to impose their own.

Jaghatai Khan strives for perfection and speed. His White Scars engage in shamanistic ritual sacrifice and indulgence in order to gain the blessings of the various spirits. When Horus calls on his brother to join him, the Khan is already well and truly damned.