Editing Exterminatus (section)

===Necrons===
The [[Necrons]] have lost many WMDs, but may have several more just waiting to be awakened. ([[Not as Planned|Maybe the Necrons are more trigger-happy with Exterminatus than the Imperium, but they're better at ensuring there're no witnesses]]?).

One of their most notorious Exterminatus-tier machines was the [[The World Engine|World Engine]], which was a planet-sized vessel equipped with the largest [[Gauss|gauss weapon]] known to man. It looked like the combination of a Death Star, Unicron and a Forerunner Shield-World all rolled into one. A [[Rape|flying rape-machine of ungodly proportions]], it took a coalition of several Space Marine chapters and the entire Imperial fleet of the Vidar Subsector to destroy it. For some reason, it had shields that could withstand the [[Awesome|bombardment of an ''entire navy'',]] yet it was [[What|vulnerable]] to a ship [[Meme|impacting at sufficient velocity.]] (Then again, most space shields are designed to stop large projectiles weighing several dozen tonnes fired at high velocity, not kilometers-long Battle Barges weighing hundreds of thousands of tonnes or more [[Angry Marines|being forced up their ass]] at comparatively slow velocity).

The [[Maynarkh Dynasty]] deploys a peculiar device that causes supercharged solar flares that incinerate the daylight-facing sides of ALL planets in a system. Unfortunately for the population on the side of the planet facing away from the sun, incinerating half a planet's surface would also incinerate its atmosphere, stripping the whole planet bare of its life giving biosphere, or whatever gases it had trapped. Even more unfortunately, Maynarkh Necrons are even more interested in making a planetfall and skinning them alive.

Also, the Tomb World of Thanatos has a giant hologram map of the galaxy known as the '''Celestial Orrery''', and if [[What|you were to destroy a star on it, the real life counterpart would go supernova]]. While this makes the Necrons seem like [[Matt Ward|the most powerful faction in the entire galaxy by far]] who could [[Bullshit|instantly kill everyone else in the galaxy without any risk]], the lore also states that a star detonated this way could set off a catastrophic and unpredictable chain-reaction of dying stars which in turn could destroy the whole galaxy. It could also destroy the Necrons of Thanatos, which would destroy the Celestial Orrery and guarantee the death of the entire galaxy, something even the Necrons are not willing to risk.

(In a similar vein to the above, if the Necrons ''really'' wanted to destroy a world, they could just unleash a particularly powerful Transcendent C'tan shard on it without a Tesseract Vault. Though it would most likely escape and be nearly impossible to return to Necron control, it would achieve the same effects.)

The Necrons can also employ an [[Abattoir]] when directly terraforming a planet. They are large, [[monolith]]-like devices except that they physically carry what they're transporting, are the size of a small city, and are covered in tentacles that disintegrate organic material while harvesting its anguish. Also, given that their standard guns can disintegrate adamantium, and they don't mind waiting a few million years to achieve their goals, an enterprising (or bored) Lord could just order his legions to start shooting rocks, making for a thorough but hilariously slow Exterminatus.

In "Twice-dead King" novels one of their capital ships has a star, [[Wat|too large to be held together by its own gravity]], stashed inside a sub-dimensional pocket, which both hides its gravity and stabilizes its existense. If need arises, the pocket can be opened, releasing a blast powerful enough to ''melt a continent''. The funny thing is that said weapon was initially designed to be used against enemies' fleets, not planets.