Jade Legion

Founding
The Jade legion were first created from the geneseed of their primarch after the loss of Primarchs in the Genetic Lab of Luna. Their Primarch’s unique Powers of the warp were inherited to some extent by the legion itself, a power to bend the barrier between the warp and the material space to blur the line and access the Powers of empyrean easily. The legion is made up entirely of Psykers. Reunion When they met their Primarch, Atrokyraz, on the World of Rarenth, the legion was endowed with powerful artifacts Atrokyraz had forged and stolen over the decades of his wars across the planet’s surface, with creatures of the warp trapped within their strange artifacts not in any way similar to normal chaos sorcerers. Despite pledging allegiance to his father eagerly, he was less than thrilled at being told that he was a mere general, whereas on his World he was a philosopher, a king, a god, a powerful authority whose voice was listened to.(edited)

Great Crusade
Prior to meeting their Primarch they aided the Emperor’s Great Crusade as enforcers and shock troopers, their psykic might crushing any foe that the Astra Militarum could not break, and their dreadful Powers keeping any World they were garrisoned in obedient out of fear. Legion’s numbers were few, and they were seldom deployed for prolonged warfare because of it. Their geneseed was expensive to produce and keep safe due to drawing the warp close to itself, and required being implanted on psykers only which made it even harder to find recruits. Overall only 20000 were created,divided into 40 units of 500 marines called Cabals, which are led by Cabalites. The low numbers are easily made up by the Jade Legion, an entire legion’s worth of soldiers that are composed of psychoreactive materials and possessed by Warp Constructs. These entities are not daemons, and are akin to artificial intelligence made out of warp energy, controlled by the Alchemists’ legionnaries. Though it is also possible to produce these Jade Constructs out of souls of people aswell. Now the Alchemists serve the Great Crusade without any secondary motives, not one that is told outsiders anyways, but they do tend to stick around after conquering the planets of mankind to assert the authority of the Imperium, leaving many worlds both in awe and fear of the Ninth Legion.