Sentinel Iron Men Go Online

The Primaris Space Marine upgrade surgery merely provided a path forward for the already-formed first-generation Astartes.

Later Primaris Astartes would have the upgrade surgery incorporated directly into their first transformation, avoiding repeated procedures and wasted resources.

The Primaris upgrade was not merely a continued enhancement of the body; it also meant a continual ascension of the mind and soul.

To surpass their original limits of life, an Astartes's will and spirit had to be tested for sufficient strength.

Yet unwavering will was the most ordinary thing for these Space Marines who had followed Lox into the X-Men universe.

Every one of them had carved a path out of mountains of corpses and seas of blood, survived the slaughter of countless enemies and daemons, and held steadfast faith in the Emperor, never fearing death.

The emergence of Primaris technology would be a blessing for certain smaller Legions.

Many factors limited the size of Astartes Legions: gene-seed compatibility, gene-seed purity and stability, Legion recruitment culture, proficiency with augmentation procedures, and so on.

Gene-seed compatibility determined whether it was "picky" and whether it could transform humans of more varied traits.

Purity and stability determined whether stable, reliable gene-seed could be harvested from transformed Astartes.

An Astartes possessed two gene-seeds. One could only be recovered after death, while the other could be extracted once it had matured.

It was precisely through this means of propagation that Astartes Legions could maintain natural growth.

Legions such as the Ultramarines and Dark Angels had highly compatible, exceptionally pure, stable gene-seed, so they naturally surpassed difficult-to-recruit Legions like the Space Wolves and Thousand Sons in numbers.

Furthermore, Lox had used his prestige to influence the recruitment cultures of every Legion, allowing candidates who would once have been lost in large numbers during this stage to survive.

Combined with