Dominators

"My loyalty is only to the Emperor and his ideals, i was member of our legion long before you were even born boy. I am terran born as my old friend Rylanor. You disgust me, look at yourself wench. You call yourself Emperor's children but even the techno-barbarians of terra had more nobility than you. Say this to Fulgrim. I Rhamiel will forgive you with fire and death."

Emperor's children dreadnought Rhamiel the Dominator speaking to unknown traitor Emperor's children before his last stand with his squad and Iron hands at Istvan III.The Dominators are loaylist space marine chapter derived from gene-seed of Primarch Ferrus Manus. They are non-compliant codex chapter. They are known for their brutal purges opon chaos infested worlds. They hate chaos more than anything and they are willing to go to great lengths to extinguish flamex of chaos.

Even thought their unwavering loyalty to the Emperor of mankind, they look down opon normal humans as weak sacks of flesh that are easily corrupted by ruinous powers. They believe in uncorruptable will of bionics.

Chapter is organised in hierarchical structure. Instead of chapter master, Dominators have Iron king who rules over the clans. Each clan has 200 members and their own small fortess monastery at highest mountains of Orh'neon. There is only 1 Iron king and 9 Masters of metal.

Each clan has different colours of trim. Names of clans are unknown, only name of first clan has been translated to low and high gothic as Cobra kings, rest are unknown.

 Rhamiel the Dominator 

Rhamiel was terran born member of Emperor's children, his skills with lascannon were legendary. None had better accuracy in his legion other than his Primarch Fulgrim. He was known for using two custom lascannons. He was very fond of tenth legion, so when he was heavily injured in battle with Laers, he requested to be entombed into dreadnought with help of tenth legion. This decision probably saved Rhamiel from chaos corruption. With him went around 100 other Emperor's children. They have been on ship of Iron hands when Istvaan atrocity happened, they known nothing of what their legion had done. When Istvaan 5 massacre happened, Rhamiel as dreadnought and his squad stood with Iron hands to bitter end. Only 27 of loyal Emperor's children remained. In honor of Rhamiel they were allowed to make a new chapter. Still Dominators chapter is 95% made of Iron hands gene-seed.