Editing Warhammer 40,000 8th edition (section)

====[[Tyranids]]====
* The Great Rift has become a stumbling block for the Tyranids; as Daemons have no biomass to harvest and planets lost to Chaos are usually sucked into the Warp, the Hive Mind has begun to create new generations of Hive Fleets better able to handle the Great Rift's pressures. 
* Brief descriptions of the preferred tactics of the main Hive Fleets:
** Behemoth uses a simple brute force approach, favoring powerful monsters above all else as it smashes its way through any resistance. 
** Kraken excels at outflanking and outmaneuvering its prey, and also exploits Lictors and Genestealers to perform hit-and-run attacks. 
** Leviathan possesses a more advanced synaptic network than other Hive Fleets and prefers coordinated attacks from both land and air.
** Jormungandr seeds planets with broods of Raveners, Trygons, and Mawlocs to undermine defenses and ambush victims when the invasion begins in earnest. Should they be repelled, they retreat to the tunnels to resume their assault later. 
*** Jormungandr's tactics and even color scheme is a pretty huge reference to the Airachnids in the [[Starship Troopers]] film. Black, Yellow, with Red highlights. Even utilize Bug Meteors. Presumably maleceptors, neurothropes and zoanthropes are Brain Bugs.
** Hydra overwhelms its foes with ridiculously massive swarms of Gaunts, which can be produced far faster than those of other Hive Fleets. It focuses mainly on planets that have recently repelled an earlier Tyranid invasion, feeding on both weakened defenders and the remnants of the previous invasion alike. 
** Gorgon deploys creatures with advanced toxic glands full of semi-sentient spores. These spores adapt specifically to kill the Hive Fleet's chosen prey, an evolution the Hive Fleet developed after its defeat by the Tau Empire. 
** Kronos focuses on ranged combat, as the Chaos forces it specializes in fighting are too dangerous to fight in melee. 
* Tyranid organisms from splinter fleets tend to develop unique markings, perhaps as a way to distinguish them from their original Hive Fleet.
* Hive Fleet Leviathan's attack on Baal nearly succeeds, with the bugs preparing to eat Baal's moons. However, they are ultimately defeated due to a combination of the Great Rift sucking their bio-ships into the Warp, Ka'bandha showing up to keep the Tyranids from robbing him of his revenge against the Blood Angels, and the arrival of the Indomitus Crusade.  
** The tendril of Hive Fleet Leviathan engaged at Baal was confirmed as being larger even then the forces in Octarius, being the largest concentration of Tyranid seen yet. The [[Swarmlord]], as predicted, died again in a fight with a tired [[Dante]]
** Despite this, several of Leviathan's bio-ships were in fact later expelled from the Warp, forming new splinters that spread out across the galaxy. One splinter ends up attacking the Red Corsairs' fleet. Another emerges alarmingly close to Segmentum Solar, and is said to possess strange new biomorphs. Deathwatch Apothecaries involved with these battles note that the Tyranids displayed very little mutation despite being stuck in the Warp for who knows how long. 
* Hive Fleet Gorgon wasn't actually destroyed after all, as the Tau and IG were too busy fighting each other to notice the remnant of the Hive Fleet escaping. It has since rebuilt and kept busy by poisoning the crops of several agri-worlds. Several systems fall prey to the tainted foodstuffs. 
* At least three new Tyranid Hive Fleets have emerged: Kronus, Scylla, and Charybdis. 
* Hive Fleet Tiamet is building an organic psychic super structure on one of the worlds it's occupied (something that is itself highly unusual for Tyranids to do); nobody's sure what it does, but it seems to act as some kind of psychic beacon. A Deathwatch Kill-Team stumbles over the structure as they investigate the trade fleets that have gone missing near the system (themselves strongly implied to have been hijacked by Genestealer Cults for use in constructing the structure), but is quickly overwhelmed. Since then, one Watch Commander Vilnus has agreed to work with Kryptmann to figure out a plan to whatever the Tyranids are trying to do.
* Strangely, Hive Fleet Hydra has consistently ignored most inhabited worlds in its path, and instead focuses on cannibalizing the splinters of other Hive Fleets. <strike> Nobody knows why. </strike> Because even a failed fleet has biomass and DNA to be added to the swarm, and it now allows for Nid vs. Nid battles on the tabletop.
* Hive Fleet Kronos seems to be the Hive Mind's solution for dealing with the aftermath of the Great Rift, and despite its recent creation it has grown greatly thanks to Leviathan leaving several weakened worlds for the newer Hive Fleet to consume. Kronos is currently traveling coreward along the Great Rift and focuses its attacks on areas of especially intense Warp activity. Indeed, the Shadow in the Warp projected from Kronos' Zoanthropes and Maleceptors is actually strong enough to close up smaller Warp rifts entirely.
* It is suggested that the Tyranids may have entered the galaxy as early as the Great Crusade, with records making mention of a legion of flying xenos creatures that are described in terms highly reminiscent of Gargoyles in the Thracian Sector. Coincidentally, an obscure hive fleet called Hive Fleet Ouroboros that uses mostly flying creatures has been spotted in said sector, and those creatures seem to sport unusually primitive versions of the typical Tyranid biomorphs.
* One splinter fleet of Behemoth called the Court of the Nephilim King has recently been making a name for itself. Its forces consist mainly of synapse creatures, monsters, and bio-titans, allowing it to rapidly overwhelm its opponents while maintaining a greater degree of autonomy than other Tyranid forces. After a series of crushing defeats to the splinter fleet, House Raven swears vengeance against the Court of the Nephilim King.