Editing Imperium Secundus (section)

===of Sanguinius===
Thanks to his prescient sight, Sanguinius became more and more aware of his ultimate fate to die by Horus' hands. When the fact that Terra had not yet fallen became known, the three Primarchs would attempt to brave the Ruinstorm and return to the throneworld. Along the way each brother would be tested, yet none more so than Sanguinius himself, who was presented with the possibility that he might survive the Heresy and spare his legion from the Black Rage, giving him hope. However, he later realized that he would have to become something far worse than Horus in order to do it, and so he rejected this possible future and strengthened his resolve to meet his end as a loyal son of the Emperor. The Dark Angels and Ultramarine forces would buy Sanguinius the opportunity to reach the Siege of Terra by assaulting the rear flanks of the Traitor forces and drawing them away. This explains why only the Blood Angels made it back to Terra even though they left with the Dark Angels and Ultramarines, and also explains why they were delayed in the first place.

One thing that does remain from this time is the [[Sanguinor]], who was a by-product of this era. Sanguinius needed a regent to stand for him and deal with petitioners when he was too busy with other important tasks, as well as to act as a body double for the sake of assassination attempts and keep the focus away from the Primarch. Even at the time, the identity of the herald was kept a closely guarded secret and his name removed from the records of the legion. By M41, the origins of the Sanguinor are completely forgotten about even by the majority of the Blood Angels themselves, if they ever knew about the practice at all. This individual would stand in for Sanguinius at Davin, pinning a powerful daemon in place in a portal between the warp and realspace while the planet was bombarded around him (potentially setting himself up as a Draigo-like figure later on). Sanguinius was originally going to take this task upon himself, but realized in another vision that whether he died on Davin or on Terra, his death would still cause his sons to suffer the [[Black Rage]] so there was no escaping that fate.