Primaris Space Marines were the key to the second phase of the expedition plan.
Guilliman needed these warriors to help him swiftly crush the Ork Warlords and Necron dynasties, reorganize the Imperium, and strengthen humanity's military power.
This was thanks to the Heart of Guilliman, integrated with Dark Matter Biological Engine technology.
The danger of upgrading old-style Space Marines into Primaris Space Marines was nowhere near as terrifying as it had been in the original timeline. The risks had been greatly reduced.
In the original timeline, old-style Space Marines could easily encounter problems when undergoing the Primaris upgrade, resulting in casualties or even losing themselves.
Now, however, that was no longer a problem.
The Heart of Guilliman, this entirely new organ, possessed formidable nanoscale regenerative capabilities. It also tightly controlled the entire upgrade process, ensuring that no inhuman mutations occurred.
With the aid of this special organ, the process of upgrading Space Marines into Primaris Space Marines had been greatly simplified.
The success rate had risen dramatically, while the time required for the upgrade had been reduced severalfold.
In the original timeline, upgrading a Space Marine into a Primaris Space Marine took half a year.
Now, the upgrade could be completed in just half a month.
Turning recruits into Primaris Space Marines was even simpler. In the original timeline, it took at least six months for an ordinary human to become a Primaris Space Marine.
Now, it required only a month and a half.
The speed had increased fourfold.
More importantly, despite the shortened timeframe, stability had not suffered. It had actually improved.
The only reason preventing Guilliman from producing vast numbers of soldiers was the need to conduct psychological screening and tempering for recruits, preventing the seeds of corruption from being left behind.
To reduce the possibility of corruption,