Editing Warhammer 40,000 8th edition (section)

====[[Chaos Space Marines]]====
*It's confirmed that some of Abbadon's Black Crusades were merely distractions, used to keep the Imperium from realizing he had been slowly destroying the network of Pylons that the Cadian Gate had been connected to. 
*The method of creating Rubric Marines has apparently been given to the Black Legion, among other warbands.
=====[[Black Legion]]=====
*Following the opening of the Great Rift, the Forge World Raeddon tries to evacuate its most sacred manufacturing relics, but is ultimately lost to the Warp when Black Legion forces destroy all its spaceports.
*The planet Aralest VII is wiped out similarly, through a combination of mass cult uprisings and an orbital docking platform being dropped onto the world's capital hive city.
*Just as the [[War of Beasts]] looks like it couldn't get any worse, [[Haarken Worldclaimer]], the herald of [[Abaddon|Abaddon the Despoiler]] arrives with hosts of [[Raptors]] and declares the world to be the domain of Abaddon over all of [[Vigilus]]' vox networks. He proclaims that the world will fall in 80 days, and by the end, Mr. Spiky Topknot himself will arrive to oversee the invasion himself. Of course it didn't work and he goes again with his secondary plan.

=====[[Alpha Legion]]=====
*Billions of sleeper agents placed within the Imperium by the Alpha Legion are activated when they foolishly look into the night sky and see the Great Rift. The resulting rebellions lead to the fall of dozens of worlds.

=====[[Iron Warriors]]=====
*[[Obliterators]] and [[Mutilators]] are confirmed to have originated from the Iron Warriors, as the Technovirus that creates them was first made in Medrengard's laboratories. 
**[[Perturabo]] and Mortarion have worked together to allow the Technovirus to spread to other machines, transforming the war machines of their foes into mechanical abominations.
*Perturabo had spent years of studying the defenses of Segmentum Obscurus; with the opening of the Great Rift, the Daemon Primarch orders a massive siege of the Segmentum's most valuable worlds.

=====[[Night Lords]]=====
*For the Night Lords, the terror inspired by the Great Rift proves to be the perfect conditions for an unprecedented level of raiding and pillaging.
*A temporary channel through the Great Rift near the Corinthe system proves to be a Night Lords trap. The Imperial ships trying to pass through the "safe" corridor are rapidly captured by Night Lords ambush forces. 

=====[[Word Bearers]]=====
*There are persistent if unconfirmed rumors that Lorgar has elected to end his seclusion on Sicarius to lead the Word Bearers personally. 
*Despite the efforts of Craftworld Alaitoc (which probably was mostly just them getting murderized by Chaos Space Marines), the Word Bearers complete a mass sacrifice of humans, Eldar, Orks, and Tau on the planet Gruelbowl. It is quickly subsumed into a Warp rift.
*Kor Phaeton personally leads a strike force consisting of multiple Traitor Legions to attack the Talledus System, a stronghold of the Adeptus Ministorum and the Adepta Sororitas.

=====[[World Eaters]]=====
*A massive force of World Eaters is en route to Terra, having been inspired by the recent Khornate incursion there.
*At one point in the past, the Wyches of the Cult of the Seventh Woe broke into the fight pits of the World Eaters on the planet Gladius. Dozens of Wyches and Traitors alike kill each other, but Khorne is so pleased by their carnage that he sends down a shower of blood to bring the slain fighters back to life. The two factions gain a degree of respect for each other, culminating in the invasion known as the Great Blood Wager of Anathema Quartus.

=====[[Emperor's Children]]=====
*As predicted by many fa/tg/uys, [[Fabius Bile]] becomes obsessed with capturing and dissecting Primaris Space Marines from the moment he first witnesses them in action. He now seeks to find a way to blend them with the power of the Warp to create his own Chaos Primaris Space Marines, and ultimately hopes to clone Roboute Guilliman himself.

=====[[Death Guard]]=====
*A recap of the history of the Death Guard, including [[Mortarion]]'s early life on Barbarus. Mortarion's "father" is confirmed to be an alien. It's strongly suggested that Mortarion took the Emperor's killing of his foster as a thoughtless dismissal of his life's struggles against the overlords of Barbarus, and that the ensuing resentment was what eventually led him to side with Horus.
*The Death Guard's organization is discussed; much of it is very similar to the old Legion organization, albeit split into groups of 7 instead of groups of 10. 
**Specifically, it is split into 7 Plague Companies, each of which is composed of 7 Sepsis Cohorts. These in turn are split into 2 Maladictums, which are themselves composed of 7 Colonies. In practice, these all tend to deploy as smaller warbands known as Vectoriums. 
**Brief descriptions of each of the Plague Companies are given; each one is led by a Lord Commander that acts as the host of one of Nurgle's foulest diseases. Predictably, Typhus is Lord Commander of the First Plague Company.
*Typhus and the First Plague Company have focused much of their activity around what used to be the Cadian Gate, generally making life miserable for the Imperial forces trying to hold onto it. 
*Typhus and Huron Blackheart duel on the world of Danasar. Typhus wins, but allows Huron to survive as a show of Nurgle's generosity.
*The Death Guard defeats the Iron Warriors to claim control of the Temple of Ascension, with the duel between Mortarion and Perturabo lasting for seven hours.
*During the War in the Rift, [[Ka'bandha]] is banished by Mortarion using the plague-ridden skulls of seven Khornate champions.
*The Foul Blightspawn and Biologis Putrefiers are the Plague Marines tasked with creating new strains of disease for the Death Guard. The Foul Blightspawn creates new illnesses through blasphemous alchemical lore, which are then entrusted to the Biologis Putrefiers to "test" on any unfortunate victims they can find.
*Plague Surgeons were once the Apothecaries of the Death Guard. However, instead of healing their brothers they now bolster the diseases that they carry. Like their Loyalist counterparts, they too harvest gene-seed- both from the Death Guard and from any Loyalist Space Marines they might encounter. Chief among their number is one Nauseous Rotbone, Mortarion's personal physician.
*[[Foulspawn]] gets a mention; while Nurgle was amused by the Chaos Spawn's antics, Mortarion was not. However, he couldn't kill it without angering Nurgle, so instead he had it banished to the Plague Planet. It has continued to grow since that time, and is now the size of a small mountain.
*Even after becoming a Daemon Prince, Mortarion still despises witches and [[Psyker|psykers]]. The only reason he allows them in the Death Guard now is because he is forced to acknowledge their particular powers as gifts from Nurgle.

=====[[Thousand Sons]]=====
*Recap of the Thousand Sons' history, the Burning of Prospero, the Rubric of Ahriman, and the Siege of Fenris. 
*Tizca is confirmed to still exist on the Planet of the Sorcerers, though it is now mutated into a twisted mockery of its former self.
*The Thousand Sons still have their cults, albeit with a very different focus beyond simply specializing in a given psychic discipline. These include the lore-hunters of the Cult of Knowledge and the reality warpers of the Cult of Mutation. A few different Thousand Sons warbands are also introduced, complete with their own color schemes.
**The further description on how each Cult is organized strongly suggests that the Thousand Sons have significantly increased their numbers since the Horus Heresy; with some extrapolation, their numbers can be estimated at approximately 65,000 Astartes (Rubricae and Living) on top of any cultists and Tzaangors that might be serving them.
*Some kind of major ritual summoning is taking place near the Cadian Gate, overseen by the Cult of Prophecy.
*The dust within a Rubric Marine still contains the Marine's remaining essence. If a Sorcerer can recover this dust and put it into a new suit of armor, the Rubric Marine will effectively be resurrected. In at least one battle, this was used to devastating effect against the Sisters of Silence by dumping a massive cloud of Rubric-dust onto one of their fortresses, which was then followed by dropping a bunch of empty suits of armor down like meteors. [[awesome|The dust reanimated the suits into new Rubrics, and the Sisters were killed]]. 
*After his encounter with Yvraine revealing the Rubric could be undone, Ahriman has determined that the knowledge he needs to learn how to do so is hidden in Commorragh.
*[[Mutalith Vortex Beast]]s are created when dozens of [[Chaos Spawn|unnameable beasts]] end up getting fused together into a single abomination, although some very unlucky Champions of Tzeentch have ended up turning into one of them right as it appeared they were about to become Daemon Princes.
*[[Chaos Dreadnought|Helbrute]]s of the Thousand Sons are not actually created from the Sons themselves due to the unsuitability of the Rubrics to power them. Instead, they lure in members of other Legions/warbands with promises of power and bind their souls to the machines. At that point [[Grimdark|the unsuspecting pilot is flayed and scorched with warpfire while he's still conscious and able to feel it]] before being installed into the sarcophagus.
*Magnus has set a plan an in motion to hyper-accelerate humanity's development into a psychic race, gathering psykers from all over the Imperium to Sortiarius by promising them safety from Imperial persecution. Though his initial ritual is disrupted by the Grey Knights and Dark Angels, the plan itself has not yet been thwarted.

=====Other Renegades=====
*Khorne Daemonkin are still a thing. The Crimson Slaughter also gets a mention, as do the other Renegades created from the Abyssal Crusade.
*Huron Blackheart seems to have struck new bargains with the Ruinous Powers, as the Red Corsairs have been reported attacking Imperial assets far outside of the Maelstrom- and Huron himself has been reported as being in two different Segmentums at the same time.