User blog comment:Supahbadmarine/By Tzeentch! Here We Go!/@comment-2253300-20130212233132/@comment-3258762-20130213101536

So I'm gonna jump in and contribute with my own idea for a Primarch here then. Noone has anything against that? Okay.

The 21st Primarch's name is Adium Imirus, widely considered as a dull and unimaginative Primarch, and while he might not be the most tactically gifted, he was by far the most zealous to the cause of the Great Crusade. In the precense of his brothers, he would never start the conversations, and those that others started would be answered with short bursts of "Yes" and "No"s. But, when it came to talking of their father and his plan, his soul was enveloped in a fire that turned him into an oratory fanatic, ranting on long and loud about the grandeur of what the Imperium would be when his father was finished.

He was one of the last to accept the decision to leave the forgotten zone, being fully sure that the Emperor would come when he needed them to.

When he found the Imperium, it is said that he collapsed togheter in tears, his golden skin torn and ripped as he tried to claw out his own eyes at the parody of the Emperor's vision, and it took two of his brothers to hold him so he would not hurl himself out the viewport in an effort to end his own existance.

While he had been the most reluctant to leave, Imirus immediatley sided with his brothers on starting the second Great Crusade, and with a fury and zeal unrivaled did he take the fight to both the loyalists and the traitors.

The XXI Legion, the Adamant Guard, are a legion that was once devoted to the protection of the citizens it would one day be called to serve, where the lives of a Space Marine meant little if the Astartes gave his life to save the common people of Man. But now, they are warped into something worse. The Adamant Guard have little care for collateral damage, at times seemingly provoking it, purging the faithful and the heretic alike, for amongst them, the secular Imperial Truth is the only thing aspiring too.

The Adamant Guard are well-versed in the ways of Siege and Attrition Warfare, being die-hard defenders and careful attackers. Tanks and Infantry can perform admirably, but Artillery is what wins wars, according to Imirus. To them, war is simply a matter of holding out until the next round of shells could be fired, and on the offensive, they strike in inflexible waves, moving forward only a few meters, entrenching the position as best they can in expectation for the artillery to fire. Whilst formerly sacrificial and, at times, suicidal in their urge to save the citizens of the Imperium, the Adamant Guard no longer hold any such ties, and will just as easily shell a shrine as they would a fortress. In fact, it is speculated that this is often a secondary objective to the Guard.