The Ashkin Brotherhood
Although the Ashkin Brotherhood holds a reputation of cruelty and aggression in battle, they weren't always this way. In the world that was the ancestors of the Brotherhood, were free people, proud members of the empire, willing to lay down life and limb to serve Sigmar. When the new population awoke on Ghur an untold time later, they quickly set to build again what had been lost, they were lead by a gray old priest going by the name Rafta.
Building a great empire proved more than difficult as the free people began to fall to famine and disease, not to mention the frequent attacks from Orcs, and other great beasts. Slowly, generation by generation, the people's connection to the Empire of the old world, grew smaller and smaller, until one day it was gone.
The free people's population was dying out, no more could the great protectors of the world defend them, warriors, knights, and peasants fell alike, hope was lost, Sigmar had abandoned them.
Several years passed before a Great Prophet, a Descendant of Rafta , took control of leading the once great civilization. The young man, built like a bear, said his name was Petra. Petra inspired hope in his followers, as, men women, and children all began work on constructing his dream of Tashghoul, the fortress temple. With the temple completed Petra summoned his most loyal followers into his inner chamber and sealed it for eight long days, before emerging once more. The warriors and knights walked with a grim resolve, and steadfast determination they hadn't shown in many years, but the task was clear, they had to obtain the Blood God's favor, to ensure the survival of the people of Tashghoul.
Each knight went to his family, and slayed them one by one. By casting aside the family of old they became true brothers in war. After all kin had been murdered, they one by one lit family homes ablaze and stepped into the flame, emerging with thick grey armor, they were now Blood Warriors... but truly the Ash Knights.
Only the most dedicated to Khorne may wear his symbol openly, and although Petra leads the many followers, he is not the leader of Tashghoul, that title belongs to the mysterious Priestess of Blood, Yvett.