The Deltamarines
Macragge. What was once a mighty planetary sub-empire has been reduced to rubble in the all out attack by Hive Fleet Behemoth. According to Imperial vault entries, the entire First Company was wiped out in the polar fortresses. They were wrong. The Eldar of Craftworld Shlaereen, seeing the indefinite end to their race if the Ultramarines failed, created a superconsciousness which changed the First Company completely. Leaving their Ultramarines armour behind, the Deltamarines were born. With the superconsiousness, known to the Deltamarines as their exo-spirit, they only fight when they are needed most, but it is a terrible day on a planet where a Deltamarine sets foot for battle.