Editing Hive Fleet Naga

Hive Fleet Naga is a small Tyranid Hive Fleet active on the Eastern Fringe, somewhere to the north of Tau-controlled space, first discovered in 801.M41.

==Discovery and early campaigns of Naga==

When first discovered by the Imperium, Hive Fleet Naga was thought to be just another splinter of Hive Fleet Behemoth, back when most experts thought Behemoth comprised the entirety of the Tyranid species. The arrival of Hive Fleet Kraken and other small hive fleets invalidated that theory. Yet, for most of its life, Hive Fleet Naga was fought by xenos species, due to the lach of control the Imperium had in that area, plus a decent amount of warpstorms that made space travel really dangerous there. The few imperial worlds there put up a desperate defense, but cut off from the rest of the Imperium, there was little they could have done to avoid doom. Also, most experts believe that, if the trajectory of Hive Fleet Naga had been slightly different, it would have made direct contact with

Hive Fleet Naga first appeared in this galaxy in xenos-controlled territory. During most of its early encounters, it laid waste of dozens upon dozens of alien worlds, mostly those from the Ulumeathic League (an unnamed alien species GW doesn't care about, so we can basically consider them extinct at this point). During its travels, it also found dozens of Eldar maiden and exodite worlds, eating most of them. The psykic cries for help from this attacks would cause the Craftworlds of  Malan'tai, Iyanden and Idharae to quickly organize a defense for the remaining aeldari worlds in the area. 

==Naga vs the Aeldari forces==

When Hive Fleet Naga headed towards the exodite world of Halathel in 808.M41, Craftworld Malan'tai sent their fleet (along with other aeldari forces), to intercept and drive back the Tyranids before they could consume the planet. Naga responded by dividing itself into two different splinter fleets, one on course to Halathel, and the other one to the maiden world Eth-aelas. The first tendril managed to beat the Malan'thai fleet and reach the wold, whose population organized a futile last stand to defend their worldspirit shrine, failing to do so. The planet became overrun, but the remaining Malan'thai vessels managed to destroy the bio-tyranid ships from orbit. The splinter fleet was destroyed, but the planet was lost. The eldar were luckier fighting the second splinter fleet, destroying it completely and launching a successful but long campaing of biopurge in the area.


==The destruction of Craftworld Malan'tai==

After the seemingly destruction of Hive Fleet Naga, suddenly all contact was lost from Craftworld Malan'tai. Noone knew what had happened to them until it was discovered decades later by a group of Grey Knights. Drifting in realspace and bereft of all like, it seemed like Craftworld Malan'tai had been completely consumed by the tyranid menace. However, the most worrying news the discoverers were able to find out was "what" exactly caused that. Apparently,  after the destruction of Naga's first tendril, a dying bio-ship crossed paths with the Craftworld and launched everything it could against it as a desperate final act of revenge. malan'tai's forces were able to defend themselves from most of the bioforms, but suddenly, something appeared and turned the tides of the battle. Some pskycic-consuming organism (probably a bigger version of a zoanthrope) managed to reach the craftworld's infinity circuit. An infinity circuit can contain thousands, if not millions, of eldar souls, stored to protect them from Slaanesh's gaze and to power up the psykic parts of the craftworld. The beast, usually called "the Doom of Malan'tai" gained inmeasuable power by consuming all of those souls, becoming an absolute monster, capable of tearing eldars's soul from their bodies. Nowadays, the story of the "the Doom of Malan'tai" is frequently told between aeldari groups, refering to the real menace the tyranids are to the galaxy, and by mothers to scare the kids if they don't behave (if you don't clean your soulstone everyday, the "the Doom of Malan'tai" will come for you.

Oh, and the body of the "the Doom of Malan'tai" was never found, so it's easy to assume it's still at large.