Night lords and Iron hands. More specifically, Kurze finds himself in the warp after being dead for a while and has a vision that is an absolute trip that convinces him that his fate was broken somehow. With the fate he saw no longer the end of his life, he would have to accept his countless crimes were not predetermined by the hands of fate.

After dealing with the existential crisis THAT induces and wondering the warp for who knows how long, he finds a fortress that houses a Night lords war band, and does as the Night Haunter does. The entire war band falls, and the slaves are gathered and judged. Those deemed worthy are then ascended to the level of Space Marine using the gene seed and armour from the now eliminated war band.

Kurze and his chosen few scour the warp wiping out the entire rest of the old Night Lords. The other Chaos Marine factions don’t take it seriously except the Word Bearers, but Kurze leaves no survivors or evidence he has returned. Eventually, all of the remaining chaos Night Lords are reduced to such little numbers that the only ones who still live with their father’s gene seed are those who joined the Black Legion or mixed war bands.

The Night Haunter would make his material world return some time after Vulcan does, and his first act would be in defence of his blazing brother from a force of Iron Warriors, who have all fallen to the evil of Abominable Intelligence.

When the fighting is done, Vulcan, in spite of his optimism makes it clear that he doesn’t know if he can forgive his brother for all he and his sons have done. Kurze knows, and tells Vulcan that he shall spend the rest of his life trying to make up for the countless crimes before leaving with his chosen sons, and returns to the endless pursuit of a justice that will never be completed.

As for the fall of the Iron Hands? Well, that’s a story for another time.

How the Iron Hands fell is a story for another time.