Editing Exterminatus (section)

===Smashing It with a Fucking Moon===
This method involves radically altering the orbit of a nearby moon or large asteroid and placing it on a collision course with the planet, and therefore requires the use of several Mechanicus voidships. This method was used to destroy Phaenon Prime when the Virus Bomb failed to wipe out the planet's corruptive influence. It was also used during the [[Horus Heresy]] by renegade Iron Hands commander Autek Mor to destroy the World Eaters recruitment world of Bodt and during the Badab War to finally smash through [[Huron Blackheart]]'s defensive Ring of Steel around Badab. Needless to say, this pretty much fucking annihilates the planet in question (or whatever else it's thrown at like Huron's defensive systems).

Despite its flair and effectiveness, [http://wh40k.lexicanum.com/wiki/Rocks_Are_Not_Free! the Administratum vehemently requests that Imperial commanders avoid this method whenever possible] because it's stupidly expensive -- it can take weeks or even months for the moon or asteroid in question to actually strike the planet, which costs rations and sublight fuel while the ships sit around doing fuck-all, while orbital bombardments only cost one day's worth of rations and fuel, plus ammunition. That said there is one advantage to doing this: you don't need to be near the planet to pull it off. If the planet in question has strong enough Orbital or Surface to Orbit Defences you can't get close, to do a traditional bombing, then a old fashion moon can be set up few thousand million kilometres away.