Editing Horus Heresy (section)

===Angron: Slave of Nuceria===
Covers the events leading to the World Eaters' adoption of the Butcher's Nails and the Ghenna massacre. Ever since taking command of the Legion, Angron has been ordering them to complete every planetary conquest they undertake in thirty-one hours, this being the length of a single day on Nuceria. When and if they fail, he has them kill one in every ten Astartes; the same thing Perturabo did when he took command of the Iron Warriors. This has happened so many times that the World Eaters are starting to suffer some serious daddy issues, and the only way for them to earn his approval is to accept the Butcher's Nails. Unfortunately for them, the implants keep failing, sometimes explosively so, until they're sent to bring a rebellious Imperial world back into compliance and find that it's been turned into a planet full of androids who were created with some of the same tech used in the Nails; with this, one of the Legion's Apothecaries is able to create a stable version of the Nails. Kharn is the first to successfully undergo the procedure, and the Nails make him [[Rip and Tear|RAGE]] so hard the book literally blacks out for a couple of pages. Angron orders the entire legion to be implanted, which triggers a brief spate of infighting between the World Eaters who want to earn Papa Angron's approval at any cost and those who think that he's a broken psychopath who needs to be taken to the Emperor for help. The one World Eater captain who still thinks the Nails are a terrible idea gets killed by Kharn in a duel and the rest of them submit to the procedure. The story ends right as Russ shows up with the entire VI Legion fleet, having decided that Angron needs a talking-to about all this nonsense. We all know how this ends, of course. There's also an epilogue where Kharn happens to ransack Ghenna 10,000 years later and comes across an embellished statue of the World Eater captain he beheaded, and has a rare moment of clear headed dispair for what he and his broken legion have become.

The book gives Angron some character development beyond "giant frothing berserker" which turns him into a pretty tragic figure. As it turns out, he didn't get the Butcher's Nails immediately after landing on Nuceria, but received them as a punishment for refusing to kill his adoptive father in the arenas. Before the Nails he was a pretty bro-tier guy who loved his fellow gladiators and used what appeared to be latent psyker powers to absorb all their nightmares so they could rest properly while he dealt with all their accumulated fear and anger. This Angron would have probably made one hell of a general for the Crusade. Then the Nails got pounded into his head and he Hulked out and killed his adoptive father, which broke him and turned him into the psychotic death machine we're all familiar with. [[Slayer|He also has a death wish caused by the Emperor yoinking him from his last stand with the other gladiators on Nuceria and has spent the entirety of the Great Crusade looking for something tough enough to kill him.]]