Demonkin: Duke Mordax Baleblood

The mighty spacemarine Captain Korgan Balestrong was the leader of the Second founding Chapter the Void Rangers, sucessors to son's of Huron. When his primarch rebelled he followed the path set before him leading his brothers to many distinguiushed victories. But he secretely had always held reservations regarding the killing of innocents, for he was a principled man. Yet inpsite of his space marine brothers and initiation, he always held close ties to his clan from the Planet Illium of the Galactic south. It was during the crusade to reclaim Illium from the Angels of Absolution that he was forever changed.

Laying siege to last three hives on the planet the Void Rangers had nearly completed their conquest when the angels of absolution negotiated a hostage release as tactic to buy more time for reinforcements to arrive. Marching entire clans out of the Hive, the clan of Korgan was, marched from the Hive gate to the defensive lines of the Void Rnagers. Suddenly thunderhawks and the Dark Angel battlebarges lanced into the Void Ranger lines and the citizenry marching towards them. Korgan looked on before he flew into a berserker rage. Taking therage of his lost family and clan, he was said to begin to glow with a maleficent aura. He charged the enemy lines and although he shoud have been killed, he and his band of veterans retook the Hive city that night. His anger had made him powerfull indeed. He vowed his allegiance to Khorne and rebranded his followers the cult of the Ninth gate. For himslef he began to use the Title Mordax Baleblood, promising to his  followersand provide skull to seek vengeance to sins that can not be repaied.

and finally some cultists from the cult of nine.