After learning that the Sons of Dorn were returning to Terra to seek an audience with their Primarch father, Guilliman went straight to Dorn to arrange a grand Celebration on Terra, the first in a long time.
Guilliman's proposal met with Vulkan's and Leman Russ's approval.
After all, the Imperium always needed a little good news to bolster morale.
For this Celebration, Guilliman intended to have every returned Primarch take part.
To that end, he sent a message to Jaghatai, who had only just departed, and also tried to contact Lion El'Jonson.
As for Corax, no one knew where he was.
Still, Guilliman invited the Raven Guard to attend the Celebration as well.
Yet to certain people within the Inquisition, such a move all but sounded an alarm.
Numerous Primarchs were gathering on Terra with their sons.
And Guilliman was the instigator.
Was this truly a celebration of the Primarchs' return, or did they have another purpose?
Hidden forces began to converge.
More and more Sons of Dorn answered the announcement of the Celebration and returned to Terra, not merely for the festivities themselves, but to meet their Primarch father in person.
Many Chapters had duties to fulfill, so they had to draw lots to select a few representatives to attend, and those places carried immense honor.
Quite a few warriors won that distinction through honor duels between brothers.
But when the Black Templars arrived on Terra, they shocked almost everyone.
Chapter Master Helbrecht personally led more than twenty thousand battle-brothers back to Terra.
That far exceeded the number a Chapter was supposed to possess.
Yet Guilliman expressed no displeasure, even though they clearly had no intention of adhering to the Codex Astartes.
In fact, this was the solution Sigismund had devised long ago.
The Codex stipulated that under normal